./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF --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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:40:09,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:40:09,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:40:09,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:40:09,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:40:09,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:40:09,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:40:09,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:40:09,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:40:09,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:40:09,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:40:09,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:40:09,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:40:09,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:40:09,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:40:09,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:40:09,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:40:09,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:40:09,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:40:09,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:40:09,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:40:09,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:40:09,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:40:09,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:40:09,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:40:09,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:40:09,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:40:09,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:40:09,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:40:09,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:40:09,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:40:09,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:40:09,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:40:09,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:40:09,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:40:09,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:40:09,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:40:09,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:40:09,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:40:09,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:40:09,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:40:09,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-12 22:40:09,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:40:09,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:40:09,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:40:09,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:40:09,461 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:40:09,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:40:09,462 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:40:09,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:40:09,462 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:40:09,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:40:09,463 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:40:09,464 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:40:09,464 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:40:09,464 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:40:09,464 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:40:09,465 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:40:09,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 22:40:09,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 22:40:09,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:40:09,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:40:09,467 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:40:09,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:40:09,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:40:09,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:40:09,468 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 22:40:09,468 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 22:40:09,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 22:40:09,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:40:09,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:40:09,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:40:09,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:40:09,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:40:09,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:40:09,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:09,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:40:09,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:40:09,473 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:40:09,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:40:09,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:40:09,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:40:09,474 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_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-11-12 22:40:09,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:40:09,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:40:09,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:40:09,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:40:09,866 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:40:09,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/list-properties/simple-2.i [2021-11-12 22:40:09,962 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/e4dce2a2d/8b52879c5986476599ed7b3d51b8f3e4/FLAGe99e16e0b [2021-11-12 22:40:10,611 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:40:10,613 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/sv-benchmarks/c/list-properties/simple-2.i [2021-11-12 22:40:10,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/e4dce2a2d/8b52879c5986476599ed7b3d51b8f3e4/FLAGe99e16e0b [2021-11-12 22:40:10,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/e4dce2a2d/8b52879c5986476599ed7b3d51b8f3e4 [2021-11-12 22:40:10,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:40:10,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:40:10,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:10,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:40:10,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:40:10,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:10" (1/1) ... [2021-11-12 22:40:10,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c70d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:10, skipping insertion in model container [2021-11-12 22:40:10,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:10" (1/1) ... [2021-11-12 22:40:10,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:40:10,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:40:11,375 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-12 22:40:11,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:11,392 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:40:11,461 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-12 22:40:11,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:11,507 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:40:11,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11 WrapperNode [2021-11-12 22:40:11,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:11,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:11,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:40:11,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:40:11,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:11,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:40:11,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:40:11,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:40:11,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:40:11,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:40:11,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:40:11,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:40:11,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (1/1) ... [2021-11-12 22:40:11,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:11,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:40:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:40:11,759 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-12 22:40:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-12 22:40:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 22:40:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 22:40:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:40:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:40:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:40:11,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:40:11,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:40:11,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:40:11,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:40:11,956 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-12 22:40:12,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:40:12,285 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:40:12,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:12 BoogieIcfgContainer [2021-11-12 22:40:12,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:40:12,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:40:12,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:40:12,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:40:12,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:40:10" (1/3) ... [2021-11-12 22:40:12,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ac5fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:12, skipping insertion in model container [2021-11-12 22:40:12,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:11" (2/3) ... [2021-11-12 22:40:12,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ac5fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:12, skipping insertion in model container [2021-11-12 22:40:12,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:12" (3/3) ... [2021-11-12 22:40:12,303 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-11-12 22:40:12,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:40:12,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-12 22:40:12,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:40:12,377 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, mAutomataTypeConcurrency=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 [2021-11-12 22:40:12,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-12 22:40:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 36 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 22:40:12,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:12,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 22:40:12,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash 115843266, now seen corresponding path program 1 times [2021-11-12 22:40:12,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:12,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990641365] [2021-11-12 22:40:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:12,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:12,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990641365] [2021-11-12 22:40:12,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990641365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:12,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:12,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:40:12,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257265702] [2021-11-12 22:40:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:12,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:40:12,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:12,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:40:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:40:12,630 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 36 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-12 22:40:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:12,665 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-12 22:40:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:40:12,668 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-11-12 22:40:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:12,675 INFO L225 Difference]: With dead ends: 38 [2021-11-12 22:40:12,675 INFO L226 Difference]: Without dead ends: 33 [2021-11-12 22:40:12,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:40:12,682 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:12,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 16.99ms Time] [2021-11-12 22:40:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-12 22:40:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-12 22:40:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 2.0) internal successors, (34), 32 states have internal predecessors, (34), 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) [2021-11-12 22:40:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-12 22:40:12,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 5 [2021-11-12 22:40:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:12,721 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-12 22:40:12,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-12 22:40:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-12 22:40:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:40:12,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:12,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:40:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:40:12,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -703850802, now seen corresponding path program 1 times [2021-11-12 22:40:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:12,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119577675] [2021-11-12 22:40:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:12,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:12,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:12,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119577675] [2021-11-12 22:40:12,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119577675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:12,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:12,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:40:12,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504508513] [2021-11-12 22:40:12,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:12,790 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-12 22:40:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:12,874 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-12 22:40:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) Word has length 6 [2021-11-12 22:40:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:12,898 INFO L225 Difference]: With dead ends: 40 [2021-11-12 22:40:12,898 INFO L226 Difference]: Without dead ends: 40 [2021-11-12 22:40:12,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:12,900 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.26ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:12,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 10 Invalid, 52 Unknown, 0 Unchecked, 2.26ms Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 62.67ms Time] [2021-11-12 22:40:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-12 22:40:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-12 22:40:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 34 states have internal predecessors, (41), 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) [2021-11-12 22:40:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-12 22:40:12,909 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2021-11-12 22:40:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:12,909 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-12 22:40:12,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-12 22:40:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-12 22:40:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:40:12,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:12,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:40:12,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:40:12,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash -703850801, now seen corresponding path program 1 times [2021-11-12 22:40:12,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:12,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521253329] [2021-11-12 22:40:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:12,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:13,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:13,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521253329] [2021-11-12 22:40:13,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521253329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:13,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:13,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:40:13,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386164390] [2021-11-12 22:40:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:13,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:13,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:13,006 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-12 22:40:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:13,094 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-11-12 22:40:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:13,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) Word has length 6 [2021-11-12 22:40:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:13,096 INFO L225 Difference]: With dead ends: 45 [2021-11-12 22:40:13,096 INFO L226 Difference]: Without dead ends: 45 [2021-11-12 22:40:13,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:13,099 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:13,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 19 Invalid, 53 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [14 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 67.61ms Time] [2021-11-12 22:40:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-12 22:40:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-11-12 22:40:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 40 states have internal predecessors, (45), 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) [2021-11-12 22:40:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-12 22:40:13,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2021-11-12 22:40:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:13,109 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-12 22:40:13,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-12 22:40:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-12 22:40:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 22:40:13,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:13,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:13,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:40:13,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -388840606, now seen corresponding path program 1 times [2021-11-12 22:40:13,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:13,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586012755] [2021-11-12 22:40:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:13,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:13,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:13,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586012755] [2021-11-12 22:40:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586012755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:13,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:13,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:13,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194949755] [2021-11-12 22:40:13,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:13,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:13,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:13,187 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-11-12 22:40:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:13,271 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-11-12 22:40:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) Word has length 9 [2021-11-12 22:40:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:13,273 INFO L225 Difference]: With dead ends: 43 [2021-11-12 22:40:13,273 INFO L226 Difference]: Without dead ends: 43 [2021-11-12 22:40:13,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:13,275 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:13,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 56.67ms Time] [2021-11-12 22:40:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-12 22:40:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-11-12 22:40:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 40 states have internal predecessors, (44), 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) [2021-11-12 22:40:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-12 22:40:13,283 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 9 [2021-11-12 22:40:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:13,284 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-12 22:40:13,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-11-12 22:40:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-12 22:40:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 22:40:13,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:13,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:13,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:40:13,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -14758093, now seen corresponding path program 1 times [2021-11-12 22:40:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:13,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137075759] [2021-11-12 22:40:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:13,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:13,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:13,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137075759] [2021-11-12 22:40:13,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137075759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:13,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:13,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:40:13,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125984463] [2021-11-12 22:40:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:13,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:40:13,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:40:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:40:13,420 INFO L87 Difference]: Start difference. First operand 41 states and 44 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) [2021-11-12 22:40:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:13,564 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-12 22:40:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:13,565 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 11 [2021-11-12 22:40:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:13,569 INFO L225 Difference]: With dead ends: 47 [2021-11-12 22:40:13,569 INFO L226 Difference]: Without dead ends: 47 [2021-11-12 22:40:13,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:13,581 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:13,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 54 Invalid, 86 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [12 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 97.60ms Time] [2021-11-12 22:40:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-12 22:40:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-11-12 22:40:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.46875) internal successors, (47), 43 states have internal predecessors, (47), 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) [2021-11-12 22:40:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-12 22:40:13,588 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 11 [2021-11-12 22:40:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:13,589 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-12 22:40:13,589 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) [2021-11-12 22:40:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-12 22:40:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 22:40:13,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:13,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:13,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:40:13,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1666679700, now seen corresponding path program 1 times [2021-11-12 22:40:13,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:13,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329992332] [2021-11-12 22:40:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:13,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:13,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:13,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329992332] [2021-11-12 22:40:13,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329992332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:13,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:13,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:40:13,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261215620] [2021-11-12 22:40:13,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:13,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:13,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:13,717 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-12 22:40:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:13,851 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-12 22:40:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) Word has length 12 [2021-11-12 22:40:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:13,857 INFO L225 Difference]: With dead ends: 54 [2021-11-12 22:40:13,857 INFO L226 Difference]: Without dead ends: 54 [2021-11-12 22:40:13,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:40:13,863 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:13,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 100.45ms Time] [2021-11-12 22:40:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-12 22:40:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2021-11-12 22:40:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.40625) internal successors, (45), 41 states have internal predecessors, (45), 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) [2021-11-12 22:40:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-11-12 22:40:13,877 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 12 [2021-11-12 22:40:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:13,878 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-11-12 22:40:13,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-12 22:40:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-11-12 22:40:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 22:40:13,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:13,879 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:13,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:40:13,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1666679699, now seen corresponding path program 1 times [2021-11-12 22:40:13,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:13,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338474209] [2021-11-12 22:40:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:13,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:14,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:14,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338474209] [2021-11-12 22:40:14,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338474209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:14,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:14,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:40:14,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017895831] [2021-11-12 22:40:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:14,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:14,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:14,033 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-12 22:40:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:14,201 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-12 22:40:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) Word has length 12 [2021-11-12 22:40:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:14,203 INFO L225 Difference]: With dead ends: 49 [2021-11-12 22:40:14,203 INFO L226 Difference]: Without dead ends: 49 [2021-11-12 22:40:14,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:14,208 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:14,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 83 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 106.23ms Time] [2021-11-12 22:40:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-12 22:40:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-12 22:40:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 32 states have internal predecessors, (36), 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) [2021-11-12 22:40:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-12 22:40:14,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12 [2021-11-12 22:40:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:14,224 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-12 22:40:14,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-12 22:40:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-12 22:40:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:40:14,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:14,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:14,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:40:14,226 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1297449383, now seen corresponding path program 1 times [2021-11-12 22:40:14,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:14,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166996691] [2021-11-12 22:40:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:14,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:40:14,245 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:40:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:40:14,284 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 22:40:14,284 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:40:14,286 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2021-11-12 22:40:14,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-11-12 22:40:14,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-11-12 22:40:14,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-11-12 22:40:14,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-11-12 22:40:14,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-11-12 22:40:14,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-11-12 22:40:14,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-11-12 22:40:14,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-11-12 22:40:14,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-11-12 22:40:14,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-11-12 22:40:14,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (4 of 16 remaining) [2021-11-12 22:40:14,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (3 of 16 remaining) [2021-11-12 22:40:14,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2021-11-12 22:40:14,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (1 of 16 remaining) [2021-11-12 22:40:14,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (0 of 16 remaining) [2021-11-12 22:40:14,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:40:14,296 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:14,299 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:40:14,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:40:14 BoogieIcfgContainer [2021-11-12 22:40:14,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:40:14,325 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:40:14,326 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:40:14,326 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:40:14,326 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:12" (3/4) ... [2021-11-12 22:40:14,330 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:40:14,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:40:14,331 INFO L158 Benchmark]: Toolchain (without parser) took 3474.18ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 76.4MB in the beginning and 58.2MB in the end (delta: 18.2MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2021-11-12 22:40:14,332 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 115.3MB. Free memory was 87.8MB in the beginning and 87.8MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:14,332 INFO L158 Benchmark]: CACSL2BoogieTranslator took 646.40ms. Allocated memory is still 115.3MB. Free memory was 76.3MB in the beginning and 81.5MB in the end (delta: -5.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:40:14,333 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.35ms. Allocated memory is still 115.3MB. Free memory was 81.5MB in the beginning and 79.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:40:14,333 INFO L158 Benchmark]: Boogie Preprocessor took 63.81ms. Allocated memory is still 115.3MB. Free memory was 79.6MB in the beginning and 78.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:14,333 INFO L158 Benchmark]: RCFGBuilder took 631.05ms. Allocated memory is still 115.3MB. Free memory was 78.5MB in the beginning and 64.4MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:40:14,334 INFO L158 Benchmark]: TraceAbstraction took 2033.78ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 63.9MB in the beginning and 58.2MB in the end (delta: 5.7MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2021-11-12 22:40:14,334 INFO L158 Benchmark]: Witness Printer took 5.21ms. Allocated memory is still 142.6MB. Free memory was 58.2MB in the beginning and 58.2MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:14,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 115.3MB. Free memory was 87.8MB in the beginning and 87.8MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 646.40ms. Allocated memory is still 115.3MB. Free memory was 76.3MB in the beginning and 81.5MB in the end (delta: -5.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.35ms. Allocated memory is still 115.3MB. Free memory was 81.5MB in the beginning and 79.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.81ms. Allocated memory is still 115.3MB. Free memory was 79.6MB in the beginning and 78.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 631.05ms. Allocated memory is still 115.3MB. Free memory was 78.5MB in the beginning and 64.4MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2033.78ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 63.9MB in the beginning and 58.2MB in the end (delta: 5.7MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 5.21ms. Allocated memory is still 142.6MB. Free memory was 58.2MB in the beginning and 58.2MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 39 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 218 SdHoareTripleChecker+Valid, 508.23ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 218 mSDsluCounter, 252 SdHoareTripleChecker+Invalid, 411.06ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 121 mSDsCounter, 60 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 343 IncrementalHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 60 mSolverCounterUnsat, 134 mSDtfsCounter, 343 mSolverCounterSat, 15.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 42 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 270 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 4/4 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 22:40:14,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF --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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:40:17,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:40:17,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:40:17,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:40:17,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:40:17,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:40:17,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:40:17,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:40:17,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:40:17,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:40:17,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:40:17,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:40:17,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:40:17,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:40:17,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:40:17,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:40:17,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:40:17,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:40:17,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:40:17,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:40:17,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:40:17,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:40:17,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:40:17,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:40:17,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:40:17,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:40:17,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:40:17,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:40:17,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:40:17,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:40:17,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:40:17,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:40:17,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:40:17,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:40:17,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:40:17,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:40:17,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:40:17,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:40:17,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:40:17,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:40:17,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:40:17,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-12 22:40:17,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:40:17,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:40:17,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:40:17,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:40:17,295 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:40:17,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:40:17,295 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:40:17,296 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:40:17,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:40:17,296 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:40:17,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 22:40:17,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 22:40:17,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:40:17,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:40:17,299 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:40:17,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:40:17,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:40:17,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:40:17,300 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 22:40:17,300 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 22:40:17,300 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 22:40:17,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:40:17,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:40:17,301 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:40:17,301 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:40:17,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:40:17,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:40:17,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:40:17,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:40:17,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:40:17,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:17,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:40:17,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:40:17,304 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:40:17,304 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:17,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:40:17,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:40:17,305 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_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-11-12 22:40:17,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:40:17,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:40:17,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:40:17,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:40:17,742 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:40:17,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/list-properties/simple-2.i [2021-11-12 22:40:17,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/32ebee595/cd83ff6b5d1649a7a9f88b87b7590386/FLAG6af7c9ec9 [2021-11-12 22:40:18,397 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:40:18,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/sv-benchmarks/c/list-properties/simple-2.i [2021-11-12 22:40:18,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/32ebee595/cd83ff6b5d1649a7a9f88b87b7590386/FLAG6af7c9ec9 [2021-11-12 22:40:18,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/data/32ebee595/cd83ff6b5d1649a7a9f88b87b7590386 [2021-11-12 22:40:18,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:40:18,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:40:18,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:18,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:40:18,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:40:18,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:18" (1/1) ... [2021-11-12 22:40:18,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fff10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:18, skipping insertion in model container [2021-11-12 22:40:18,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:18" (1/1) ... [2021-11-12 22:40:18,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:40:18,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:40:19,154 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-12 22:40:19,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:19,173 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:40:19,215 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-12 22:40:19,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:19,251 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:40:19,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19 WrapperNode [2021-11-12 22:40:19,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:19,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:19,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:40:19,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:40:19,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:19,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:40:19,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:40:19,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:40:19,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:40:19,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:40:19,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:40:19,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:40:19,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (1/1) ... [2021-11-12 22:40:19,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:19,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:40:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:40:19,414 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-12 22:40:19,414 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-12 22:40:19,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:40:19,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:40:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:40:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:40:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:40:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:40:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:40:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:40:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:40:19,584 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-12 22:40:19,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:40:19,998 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:40:20,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:20 BoogieIcfgContainer [2021-11-12 22:40:20,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:40:20,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:40:20,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:40:20,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:40:20,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:40:18" (1/3) ... [2021-11-12 22:40:20,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6e8541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:20, skipping insertion in model container [2021-11-12 22:40:20,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:19" (2/3) ... [2021-11-12 22:40:20,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6e8541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:20, skipping insertion in model container [2021-11-12 22:40:20,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:20" (3/3) ... [2021-11-12 22:40:20,012 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-11-12 22:40:20,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:40:20,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-12 22:40:20,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:40:20,074 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, mAutomataTypeConcurrency=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 [2021-11-12 22:40:20,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-12 22:40:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:40:20,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:20,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:40:20,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516511, now seen corresponding path program 1 times [2021-11-12 22:40:20,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:20,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547453238] [2021-11-12 22:40:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:20,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:20,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:20,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:20,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:40:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:40:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:20,349 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 [2021-11-12 22:40:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:20,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:20,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:20,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547453238] [2021-11-12 22:40:20,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547453238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:20,665 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:20,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:40:20,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270197480] [2021-11-12 22:40:20,668 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:20,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:40:20,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:40:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:40:20,705 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 2.2) 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) [2021-11-12 22:40:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:21,157 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-11-12 22:40:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:40:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) 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 6 [2021-11-12 22:40:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:21,173 INFO L225 Difference]: With dead ends: 74 [2021-11-12 22:40:21,173 INFO L226 Difference]: Without dead ends: 65 [2021-11-12 22:40:21,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:21,181 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 195 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.85ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 350.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:21,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 34 Invalid, 86 Unknown, 0 Unchecked, 5.85ms Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 350.46ms Time] [2021-11-12 22:40:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-12 22:40:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-11-12 22:40:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 49 states have internal predecessors, (61), 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) [2021-11-12 22:40:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-12 22:40:21,230 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 6 [2021-11-12 22:40:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:21,231 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-12 22:40:21,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) 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) [2021-11-12 22:40:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-12 22:40:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:40:21,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:21,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:40:21,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:21,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:21,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516510, now seen corresponding path program 1 times [2021-11-12 22:40:21,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:21,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81560706] [2021-11-12 22:40:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:21,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:21,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:21,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:40:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:40:21,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:21,530 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 [2021-11-12 22:40:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:21,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:21,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:21,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81560706] [2021-11-12 22:40:21,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81560706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:21,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:21,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:40:21,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261897929] [2021-11-12 22:40:21,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:21,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:21,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:21,618 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-11-12 22:40:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:21,782 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-12 22:40:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) Word has length 6 [2021-11-12 22:40:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:21,784 INFO L225 Difference]: With dead ends: 49 [2021-11-12 22:40:21,784 INFO L226 Difference]: Without dead ends: 49 [2021-11-12 22:40:21,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:21,786 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:21,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 144.44ms Time] [2021-11-12 22:40:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-12 22:40:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-11-12 22:40:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-11-12 22:40:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-12 22:40:21,798 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2021-11-12 22:40:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:21,801 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-12 22:40:21,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-11-12 22:40:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-12 22:40:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 22:40:21,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:21,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:21,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:22,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash 417959389, now seen corresponding path program 1 times [2021-11-12 22:40:22,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:22,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586463627] [2021-11-12 22:40:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:22,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:22,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:22,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:40:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:40:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:22,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:22,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:22,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586463627] [2021-11-12 22:40:22,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586463627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:22,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:40:22,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576866835] [2021-11-12 22:40:22,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:22,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:22,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:22,200 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-11-12 22:40:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:22,345 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-12 22:40:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2021-11-12 22:40:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:22,347 INFO L225 Difference]: With dead ends: 51 [2021-11-12 22:40:22,347 INFO L226 Difference]: Without dead ends: 51 [2021-11-12 22:40:22,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:22,349 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:22,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 130.36ms Time] [2021-11-12 22:40:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-12 22:40:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-11-12 22:40:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 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) [2021-11-12 22:40:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-11-12 22:40:22,356 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2021-11-12 22:40:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:22,356 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-11-12 22:40:22,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-11-12 22:40:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-11-12 22:40:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 22:40:22,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:22,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:22,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:22,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:22,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash 71880067, now seen corresponding path program 1 times [2021-11-12 22:40:22,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:22,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721920474] [2021-11-12 22:40:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:22,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:22,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:22,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:40:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:40:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:22,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-12 22:40:22,758 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-12 22:40:22,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-12 22:40:22,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 22:40:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:22,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:22,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:40:22,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 22:40:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 156 [2021-11-12 22:40:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:23,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:23,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721920474] [2021-11-12 22:40:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721920474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:23,112 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:40:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11567619] [2021-11-12 22:40:23,113 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:23,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:40:23,115 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-12 22:40:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:23,523 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-11-12 22:40:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) Word has length 12 [2021-11-12 22:40:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:23,526 INFO L225 Difference]: With dead ends: 82 [2021-11-12 22:40:23,526 INFO L226 Difference]: Without dead ends: 82 [2021-11-12 22:40:23,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:23,528 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 292.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.57ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 362.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:23,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 114 Invalid, 158 Unknown, 0 Unchecked, 2.57ms Time], IncrementalHoareTripleChecker [18 Valid, 122 Invalid, 0 Unknown, 18 Unchecked, 362.78ms Time] [2021-11-12 22:40:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-12 22:40:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2021-11-12 22:40:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.394736842105263) internal successors, (53), 49 states have internal predecessors, (53), 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) [2021-11-12 22:40:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-12 22:40:23,534 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2021-11-12 22:40:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:23,535 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-12 22:40:23,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-12 22:40:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-12 22:40:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:40:23,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:23,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:23,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:23,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:23,737 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:23,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769707, now seen corresponding path program 1 times [2021-11-12 22:40:23,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:23,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409364408] [2021-11-12 22:40:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:23,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:23,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:23,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:23,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:40:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:40:23,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:23,837 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 [2021-11-12 22:40:23,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-12 22:40:23,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:23,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-12 22:40:23,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-12 22:40:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:23,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:24,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:24,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409364408] [2021-11-12 22:40:24,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409364408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:24,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:24,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 22:40:24,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599177884] [2021-11-12 22:40:24,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:24,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:40:24,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:40:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:24,334 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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) [2021-11-12 22:40:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:25,113 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-11-12 22:40:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:40:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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 [2021-11-12 22:40:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:25,115 INFO L225 Difference]: With dead ends: 60 [2021-11-12 22:40:25,115 INFO L226 Difference]: Without dead ends: 60 [2021-11-12 22:40:25,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:40:25,116 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 523.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 592.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:25,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 125 Invalid, 158 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 592.97ms Time] [2021-11-12 22:40:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-12 22:40:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-11-12 22:40:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 40 states have internal predecessors, (44), 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) [2021-11-12 22:40:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-12 22:40:25,122 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 13 [2021-11-12 22:40:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:25,122 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-12 22:40:25,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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) [2021-11-12 22:40:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-12 22:40:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:40:25,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:25,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:25,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:25,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:25,334 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769708, now seen corresponding path program 1 times [2021-11-12 22:40:25,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:25,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554086233] [2021-11-12 22:40:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:25,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:25,337 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:25,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:40:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:40:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:25,404 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 [2021-11-12 22:40:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-12 22:40:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-12 22:40:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:25,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:25,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:25,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554086233] [2021-11-12 22:40:25,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554086233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:25,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:25,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:40:25,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616466883] [2021-11-12 22:40:25,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:25,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:40:25,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:25,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:40:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:40:25,555 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 22:40:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:25,846 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-12 22:40:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:40:25,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 [2021-11-12 22:40:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:25,847 INFO L225 Difference]: With dead ends: 54 [2021-11-12 22:40:25,847 INFO L226 Difference]: Without dead ends: 54 [2021-11-12 22:40:25,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:40:25,850 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 238.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:25,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 107 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 238.38ms Time] [2021-11-12 22:40:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-12 22:40:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-11-12 22:40:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 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) [2021-11-12 22:40:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-12 22:40:25,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2021-11-12 22:40:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-12 22:40:25,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-12 22:40:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-12 22:40:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 22:40:25,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:25,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:25,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:40:26,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:26,066 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1804762195, now seen corresponding path program 1 times [2021-11-12 22:40:26,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:26,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461240103] [2021-11-12 22:40:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:26,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:26,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:26,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:40:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:40:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:26,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:26,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 22:40:26,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 22:40:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:26,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:26,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-11-12 22:40:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:26,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:26,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461240103] [2021-11-12 22:40:26,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461240103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:26,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429480837] [2021-11-12 22:40:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:26,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:26,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:26,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:26,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:40:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:40:26,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:26,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:26,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-12 22:40:26,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-12 22:40:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:26,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-11-12 22:40:26,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:26,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429480837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:26,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048753601] [2021-11-12 22:40:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:26,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:40:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:26,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:40:26,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 22:40:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:27,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:40:27,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:27,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:27,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:40:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-12 22:40:27,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-12 22:40:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:27,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:27,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-11-12 22:40:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:40:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:27,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048753601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:27,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:40:27,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8, 7] total 11 [2021-11-12 22:40:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461673786] [2021-11-12 22:40:27,302 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:40:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:40:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:27,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:40:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:40:27,303 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-11-12 22:40:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:27,723 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-11-12 22:40:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:40:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 15 [2021-11-12 22:40:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:27,724 INFO L225 Difference]: With dead ends: 53 [2021-11-12 22:40:27,724 INFO L226 Difference]: Without dead ends: 53 [2021-11-12 22:40:27,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:40:27,725 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 269.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:27,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 117 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 269.81ms Time] [2021-11-12 22:40:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-12 22:40:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-11-12 22:40:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 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) [2021-11-12 22:40:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-12 22:40:27,731 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-11-12 22:40:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:27,732 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-12 22:40:27,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-11-12 22:40:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-12 22:40:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 22:40:27,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:27,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:27,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:27,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-12 22:40:28,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:28,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:28,345 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-12 22:40:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:28,345 INFO L85 PathProgramCache]: Analyzing trace with hash -113054509, now seen corresponding path program 1 times [2021-11-12 22:40:28,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:28,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964746083] [2021-11-12 22:40:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:28,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:28,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:28,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:28,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:40:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:40:28,403 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:40:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:40:28,462 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 22:40:28,462 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:40:28,463 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2021-11-12 22:40:28,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-11-12 22:40:28,476 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-11-12 22:40:28,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-11-12 22:40:28,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-11-12 22:40:28,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-11-12 22:40:28,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-11-12 22:40:28,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-11-12 22:40:28,477 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-11-12 22:40:28,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-11-12 22:40:28,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-11-12 22:40:28,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (4 of 16 remaining) [2021-11-12 22:40:28,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (3 of 16 remaining) [2021-11-12 22:40:28,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2021-11-12 22:40:28,478 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (1 of 16 remaining) [2021-11-12 22:40:28,479 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (0 of 16 remaining) [2021-11-12 22:40:28,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:28,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:28,682 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:28,684 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:40:28,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:40:28 BoogieIcfgContainer [2021-11-12 22:40:28,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:40:28,708 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:40:28,708 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:40:28,708 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:40:28,709 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:20" (3/4) ... [2021-11-12 22:40:28,712 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:40:28,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:40:28,712 INFO L158 Benchmark]: Toolchain (without parser) took 10024.74ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 50.6MB in the beginning and 45.3MB in the end (delta: 5.3MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2021-11-12 22:40:28,713 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:28,713 INFO L158 Benchmark]: CACSL2BoogieTranslator took 559.85ms. Allocated memory is still 86.0MB. Free memory was 50.5MB in the beginning and 56.0MB in the end (delta: -5.5MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2021-11-12 22:40:28,713 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.56ms. Allocated memory is still 86.0MB. Free memory was 56.0MB in the beginning and 53.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:40:28,714 INFO L158 Benchmark]: Boogie Preprocessor took 35.62ms. Allocated memory is still 86.0MB. Free memory was 53.9MB in the beginning and 52.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:28,714 INFO L158 Benchmark]: RCFGBuilder took 664.32ms. Allocated memory is still 86.0MB. Free memory was 52.5MB in the beginning and 67.3MB in the end (delta: -14.8MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-11-12 22:40:28,717 INFO L158 Benchmark]: TraceAbstraction took 8702.57ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 66.9MB in the beginning and 45.3MB in the end (delta: 21.6MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2021-11-12 22:40:28,717 INFO L158 Benchmark]: Witness Printer took 3.80ms. Allocated memory is still 119.5MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:40:28,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 559.85ms. Allocated memory is still 86.0MB. Free memory was 50.5MB in the beginning and 56.0MB in the end (delta: -5.5MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.56ms. Allocated memory is still 86.0MB. Free memory was 56.0MB in the beginning and 53.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.62ms. Allocated memory is still 86.0MB. Free memory was 53.9MB in the beginning and 52.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 664.32ms. Allocated memory is still 86.0MB. Free memory was 52.5MB in the beginning and 67.3MB in the end (delta: -14.8MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8702.57ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 66.9MB in the beginning and 45.3MB in the end (delta: 21.6MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. * Witness Printer took 3.80ms. Allocated memory is still 119.5MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={1:0}, p={1:0}] [L544] p->n = 0 VAL [a={1:0}, p={1:0}] [L545] p = a VAL [a={1:0}, p={1:0}] [L546] COND TRUE p!=0 VAL [a={1:0}, p={1:0}] [L547] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={1:0}, p={1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 8.6s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 530 SdHoareTripleChecker+Valid, 2089.20ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 530 mSDsluCounter, 494 SdHoareTripleChecker+Invalid, 1769.69ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18 IncrementalHoareTripleChecker+Unchecked, 333 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 609 IncrementalHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 161 mSDtfsCounter, 609 mSolverCounterSat, 18.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=1, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 102 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 194 ConstructedInterpolants, 1 QuantifiedInterpolants, 1528 SizeOfPredicates, 52 NumberOfNonLiveVariables, 468 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 10/16 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 22:40:28,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e73c2f66-9b96-4d92-a005-bd8e72f7e4aa/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample