./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V --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 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:55:46,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:55:46,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:55:46,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:55:46,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:55:46,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:55:46,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:55:46,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:55:46,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:55:46,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:55:46,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:55:46,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:55:46,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:55:46,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:55:46,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:55:46,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:55:46,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:55:46,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:55:46,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:55:46,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:55:46,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:55:46,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:55:46,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:55:46,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:55:46,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:55:46,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:55:46,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:55:46,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:55:46,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:55:46,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:55:46,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:55:46,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:55:46,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:55:46,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:55:46,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:55:46,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:55:46,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:55:46,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:55:46,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:55:46,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:55:46,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:55:46,603 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:55:46,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:55:46,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:55:46,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:55:46,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:55:46,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:55:46,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:55:46,631 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:55:46,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:55:46,632 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:55:46,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:55:46,632 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:55:46,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:55:46,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:55:46,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:55:46,634 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:55:46,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:55:46,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:55:46,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:55:46,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:55:46,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:55:46,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:55:46,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:55:46,637 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:55:46,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:55:46,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:55:46,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:55:46,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:55:46,639 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:55:46,639 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:55:46,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:55:46,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:55:46,640 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:55:46,640 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:55:46,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:55:46,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:55:46,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:46,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:55:46,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:55:46,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:55:46,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:55:46,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:55:46,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:55:46,642 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_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae [2021-11-23 02:55:46,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:55:46,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:55:46,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:55:46,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:55:46,938 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:55:46,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-11-23 02:55:47,009 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/3519aadf3/914a17f08ab442ea930d8f7ff1e1d07c/FLAG42cde55a3 [2021-11-23 02:55:47,538 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:55:47,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-11-23 02:55:47,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/3519aadf3/914a17f08ab442ea930d8f7ff1e1d07c/FLAG42cde55a3 [2021-11-23 02:55:47,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/3519aadf3/914a17f08ab442ea930d8f7ff1e1d07c [2021-11-23 02:55:47,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:55:47,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:55:47,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:47,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:55:47,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:55:47,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:47" (1/1) ... [2021-11-23 02:55:47,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333a8ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:47, skipping insertion in model container [2021-11-23 02:55:47,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:47" (1/1) ... [2021-11-23 02:55:47,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:55:47,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:48,265 WARN L230 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_5f11048a-e049-4e38-bf3c-69439281fd48/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-11-23 02:55:48,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:48,276 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:55:48,326 WARN L230 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_5f11048a-e049-4e38-bf3c-69439281fd48/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-11-23 02:55:48,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:48,354 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:55:48,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48 WrapperNode [2021-11-23 02:55:48,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:48,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:48,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:55:48,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:55:48,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,408 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 115 [2021-11-23 02:55:48,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:48,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:55:48,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:55:48,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:55:48,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:55:48,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:55:48,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:55:48,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:55:48,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (1/1) ... [2021-11-23 02:55:48,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:48,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:55:48,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:55:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:55:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:55:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 02:55:48,551 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 02:55:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:55:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:55:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:55:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:55:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:55:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:55:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:55:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:55:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:55:48,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:55:48,706 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:55:48,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:55:49,059 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:55:49,121 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:55:49,121 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:55:49,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:49 BoogieIcfgContainer [2021-11-23 02:55:49,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:55:49,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:55:49,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:55:49,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:55:49,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:55:47" (1/3) ... [2021-11-23 02:55:49,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eb67c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:49, skipping insertion in model container [2021-11-23 02:55:49,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:48" (2/3) ... [2021-11-23 02:55:49,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eb67c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:49, skipping insertion in model container [2021-11-23 02:55:49,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:49" (3/3) ... [2021-11-23 02:55:49,149 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2021-11-23 02:55:49,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:55:49,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-11-23 02:55:49,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:55:49,208 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 [2021-11-23 02:55:49,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-11-23 02:55:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:55:49,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:49,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:55:49,235 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:55:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash 785766796, now seen corresponding path program 1 times [2021-11-23 02:55:49,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:49,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948693215] [2021-11-23 02:55:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:49,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:49,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:49,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948693215] [2021-11-23 02:55:49,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948693215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:49,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:49,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:55:49,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736698590] [2021-11-23 02:55:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:49,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:49,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:49,520 INFO L87 Difference]: Start difference. First operand has 65 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:49,626 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-11-23 02:55:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:49,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:55:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:49,638 INFO L225 Difference]: With dead ends: 63 [2021-11-23 02:55:49,639 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 02:55:49,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:49,644 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:49,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:55:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 02:55:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-23 02:55:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 57 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-11-23 02:55:49,687 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 6 [2021-11-23 02:55:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:49,687 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-11-23 02:55:49,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-11-23 02:55:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:55:49,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:49,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:55:49,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:55:49,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:55:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 785766795, now seen corresponding path program 1 times [2021-11-23 02:55:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:49,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151626640] [2021-11-23 02:55:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:49,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:49,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:49,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151626640] [2021-11-23 02:55:49,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151626640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:49,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:49,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:55:49,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000639178] [2021-11-23 02:55:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:49,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:49,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:49,733 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:49,801 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-23 02:55:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:55:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:49,803 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:55:49,803 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 02:55:49,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:49,805 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:49,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:55:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 02:55:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 02:55:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 55 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-23 02:55:49,816 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 6 [2021-11-23 02:55:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:49,823 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-23 02:55:49,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-23 02:55:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:55:49,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:49,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:49,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:55:49,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:55:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1239671577, now seen corresponding path program 1 times [2021-11-23 02:55:49,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489376627] [2021-11-23 02:55:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:49,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:49,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:49,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489376627] [2021-11-23 02:55:49,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489376627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:49,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:49,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:49,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391053317] [2021-11-23 02:55:49,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:49,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:55:49,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:55:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:55:49,986 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:55:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:50,180 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-23 02:55:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 02:55:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:50,183 INFO L225 Difference]: With dead ends: 61 [2021-11-23 02:55:50,184 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 02:55:50,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:55:50,186 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:50,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:55:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 02:55:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-11-23 02:55:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 54 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-23 02:55:50,208 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 10 [2021-11-23 02:55:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:50,209 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-23 02:55:50,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:55:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-23 02:55:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:55:50,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:50,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:50,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:55:50,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:55:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1239671576, now seen corresponding path program 1 times [2021-11-23 02:55:50,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116182433] [2021-11-23 02:55:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:50,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:50,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116182433] [2021-11-23 02:55:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116182433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:50,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:50,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:50,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986753653] [2021-11-23 02:55:50,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:50,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:55:50,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:55:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:55:50,341 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:55:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:50,512 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-23 02:55:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 02:55:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:50,517 INFO L225 Difference]: With dead ends: 60 [2021-11-23 02:55:50,517 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 02:55:50,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:55:50,531 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:50,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 174 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:55:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 02:55:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-11-23 02:55:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 2.0) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-11-23 02:55:50,550 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 10 [2021-11-23 02:55:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:50,551 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-11-23 02:55:50,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:55:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-11-23 02:55:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:55:50,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:50,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:50,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:55:50,553 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:55:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1456849542, now seen corresponding path program 1 times [2021-11-23 02:55:50,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:50,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751758412] [2021-11-23 02:55:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:50,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:50,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:50,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751758412] [2021-11-23 02:55:50,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751758412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:50,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:50,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:50,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910622851] [2021-11-23 02:55:50,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:50,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:50,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:50,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:50,618 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:55:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:50,646 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-11-23 02:55:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 02:55:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:50,648 INFO L225 Difference]: With dead ends: 61 [2021-11-23 02:55:50,648 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 02:55:50,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:50,650 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:50,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:55:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 02:55:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-11-23 02:55:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 54 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-23 02:55:50,668 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 10 [2021-11-23 02:55:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:50,669 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-23 02:55:50,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:55:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-23 02:55:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:55:50,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:50,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:50,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:55:50,671 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:55:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:50,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1936506081, now seen corresponding path program 1 times [2021-11-23 02:55:50,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:50,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283946741] [2021-11-23 02:55:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:50,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:55:50,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283946741] [2021-11-23 02:55:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283946741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997146682] [2021-11-23 02:55:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:50,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:50,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:50,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:55:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:50,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:55:50,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:51,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:55:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997146682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:51,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330880168] [2021-11-23 02:55:51,109 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-23 02:55:51,109 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:55:51,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:55:51,120 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:55:51,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:55:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 02:55:51,379 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:55:51,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:55:51,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:55:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-23 02:55:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 02:55:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-23 02:55:51,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-23 02:55:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 02:55:51,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 02:55:51,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-23 02:55:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:55:51,652 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 02:55:51,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 45 [2021-11-23 02:55:51,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-23 02:55:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 02:55:51,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-23 02:55:51,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-23 02:55:51,878 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:55:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 02:55:51,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:51,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:55:51,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:51,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:55:51,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,027 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:55:52,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 02:55:52,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:55:52,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:55:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:52,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 250 [2021-11-23 02:55:52,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:52,324 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 0 case distinctions, treesize of input 251 treesize of output 239 [2021-11-23 02:55:52,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:52,339 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 0 case distinctions, treesize of input 248 treesize of output 236 [2021-11-23 02:55:52,453 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:55:52,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 02:55:52,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:55:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:55:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:52,591 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:55:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 02:55:52,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:55:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:55:52,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 02:55:52,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:52,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 250 [2021-11-23 02:55:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:52,847 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 0 case distinctions, treesize of input 251 treesize of output 239 [2021-11-23 02:55:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:52,861 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 0 case distinctions, treesize of input 248 treesize of output 236 [2021-11-23 02:55:53,114 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 7 treesize of output 3 [2021-11-23 02:55:53,126 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 7 treesize of output 3 [2021-11-23 02:55:53,229 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 7 treesize of output 3 [2021-11-23 02:55:53,242 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 7 treesize of output 3 [2021-11-23 02:55:53,501 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-23 02:55:53,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 396 treesize of output 401 [2021-11-23 02:55:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:53,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-23 02:55:53,681 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2021-11-23 02:55:54,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:54,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:54,570 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 02:55:54,575 INFO L158 Benchmark]: Toolchain (without parser) took 6721.49ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 63.2MB in the beginning and 63.1MB in the end (delta: 170.8kB). Peak memory consumption was 64.8MB. Max. memory is 16.1GB. [2021-11-23 02:55:54,576 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory was 61.7MB in the beginning and 61.6MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:55:54,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.57ms. Allocated memory is still 86.0MB. Free memory was 63.1MB in the beginning and 53.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:55:54,577 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.43ms. Allocated memory is still 86.0MB. Free memory was 53.1MB in the beginning and 51.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:55:54,577 INFO L158 Benchmark]: Boogie Preprocessor took 33.98ms. Allocated memory is still 86.0MB. Free memory was 51.0MB in the beginning and 49.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:55:54,578 INFO L158 Benchmark]: RCFGBuilder took 680.30ms. Allocated memory is still 86.0MB. Free memory was 49.2MB in the beginning and 30.8MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 02:55:54,578 INFO L158 Benchmark]: TraceAbstraction took 5448.60ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 30.4MB in the beginning and 63.1MB in the end (delta: -32.7MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2021-11-23 02:55:54,580 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 86.0MB. Free memory was 61.7MB in the beginning and 61.6MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 499.57ms. Allocated memory is still 86.0MB. Free memory was 63.1MB in the beginning and 53.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.43ms. Allocated memory is still 86.0MB. Free memory was 53.1MB in the beginning and 51.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.98ms. Allocated memory is still 86.0MB. Free memory was 51.0MB in the beginning and 49.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 680.30ms. Allocated memory is still 86.0MB. Free memory was 49.2MB in the beginning and 30.8MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 5448.60ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 30.4MB in the beginning and 63.1MB in the end (delta: -32.7MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 02:55:54,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/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_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V --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 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:55:57,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:55:57,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:55:57,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:55:57,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:55:57,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:55:57,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:55:57,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:55:57,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:55:57,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:55:57,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:55:57,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:55:57,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:55:57,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:55:57,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:55:57,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:55:57,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:55:57,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:55:57,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:55:57,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:55:57,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:55:57,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:55:57,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:55:57,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:55:57,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:55:57,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:55:57,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:55:57,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:55:57,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:55:57,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:55:57,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:55:57,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:55:57,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:55:57,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:55:57,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:55:57,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:55:57,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:55:57,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:55:57,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:55:57,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:55:57,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:55:57,246 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:55:57,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:55:57,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:55:57,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:55:57,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:55:57,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:55:57,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:55:57,300 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:55:57,300 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:55:57,300 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:55:57,300 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:55:57,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:55:57,302 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:55:57,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:55:57,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:55:57,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:55:57,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:55:57,304 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:55:57,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:55:57,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:55:57,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:55:57,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:55:57,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:55:57,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:55:57,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:55:57,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:55:57,306 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:55:57,306 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:55:57,307 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:55:57,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:55:57,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:55:57,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:55:57,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:55:57,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:57,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:55:57,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:55:57,309 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:55:57,309 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:57,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:55:57,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:55:57,310 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_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae [2021-11-23 02:55:57,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:55:57,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:55:57,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:55:57,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:55:57,734 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:55:57,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-11-23 02:55:57,813 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/5e167918d/f0ff5d7e9d0046619e8ede1ab0a23545/FLAG96118a3f1 [2021-11-23 02:55:58,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:55:58,415 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-11-23 02:55:58,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/5e167918d/f0ff5d7e9d0046619e8ede1ab0a23545/FLAG96118a3f1 [2021-11-23 02:55:58,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/data/5e167918d/f0ff5d7e9d0046619e8ede1ab0a23545 [2021-11-23 02:55:58,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:55:58,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:55:58,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:58,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:55:58,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:55:58,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:58" (1/1) ... [2021-11-23 02:55:58,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325a8369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:58, skipping insertion in model container [2021-11-23 02:55:58,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:58" (1/1) ... [2021-11-23 02:55:58,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:55:58,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:59,270 WARN L230 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_5f11048a-e049-4e38-bf3c-69439281fd48/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-11-23 02:55:59,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:59,299 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:55:59,363 WARN L230 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_5f11048a-e049-4e38-bf3c-69439281fd48/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-11-23 02:55:59,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:59,415 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:55:59,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59 WrapperNode [2021-11-23 02:55:59,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:59,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:59,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:55:59,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:55:59,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,489 INFO L137 Inliner]: procedures = 130, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 116 [2021-11-23 02:55:59,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:59,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:55:59,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:55:59,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:55:59,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:55:59,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:55:59,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:55:59,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:55:59,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (1/1) ... [2021-11-23 02:55:59,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:59,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:55:59,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:55:59,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:55:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 02:55:59,667 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 02:55:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:55:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:55:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:55:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:55:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:55:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:55:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:55:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:55:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:55:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:55:59,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:55:59,781 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:55:59,782 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:56:00,247 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:56:00,255 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:56:00,255 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:56:00,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:00 BoogieIcfgContainer [2021-11-23 02:56:00,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:56:00,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:56:00,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:56:00,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:56:00,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:55:58" (1/3) ... [2021-11-23 02:56:00,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197431f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:00, skipping insertion in model container [2021-11-23 02:56:00,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:59" (2/3) ... [2021-11-23 02:56:00,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197431f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:00, skipping insertion in model container [2021-11-23 02:56:00,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:00" (3/3) ... [2021-11-23 02:56:00,266 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2021-11-23 02:56:00,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:56:00,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-11-23 02:56:00,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:56:00,359 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 [2021-11-23 02:56:00,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-11-23 02:56:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 46 states have (on average 1.891304347826087) internal successors, (87), 77 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:56:00,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:00,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:00,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:56:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1813443002, now seen corresponding path program 1 times [2021-11-23 02:56:00,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:00,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390661137] [2021-11-23 02:56:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:00,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:00,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:00,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:56:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:00,637 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 [2021-11-23 02:56:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:00,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:00,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:00,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390661137] [2021-11-23 02:56:00,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390661137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:00,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:00,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 02:56:00,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751572947] [2021-11-23 02:56:00,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:00,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:56:00,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:56:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:00,798 INFO L87 Difference]: Start difference. First operand has 81 states, 46 states have (on average 1.891304347826087) internal successors, (87), 77 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:01,231 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-11-23 02:56:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:56:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:56:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:01,246 INFO L225 Difference]: With dead ends: 79 [2021-11-23 02:56:01,246 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:56:01,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:01,253 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 176 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:56:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:56:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 02:56:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 44 states have (on average 1.75) internal successors, (77), 72 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-11-23 02:56:01,291 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 7 [2021-11-23 02:56:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:01,292 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-11-23 02:56:01,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-11-23 02:56:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:56:01,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:01,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:01,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:01,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:01,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:56:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1813443001, now seen corresponding path program 1 times [2021-11-23 02:56:01,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:01,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463554492] [2021-11-23 02:56:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:01,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:01,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:01,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:01,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:56:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:56:01,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:01,626 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 [2021-11-23 02:56:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:01,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:01,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463554492] [2021-11-23 02:56:01,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463554492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:01,673 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:01,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:56:01,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523487310] [2021-11-23 02:56:01,673 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:01,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:56:01,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:56:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:01,680 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:01,843 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-11-23 02:56:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:56:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:56:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:01,846 INFO L225 Difference]: With dead ends: 74 [2021-11-23 02:56:01,846 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 02:56:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:01,848 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:01,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:56:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 02:56:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 02:56:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 70 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-11-23 02:56:01,858 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 7 [2021-11-23 02:56:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-11-23 02:56:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-11-23 02:56:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:56:01,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:01,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:01,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:02,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:02,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:56:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash 712803264, now seen corresponding path program 1 times [2021-11-23 02:56:02,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654192685] [2021-11-23 02:56:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:02,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:02,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:02,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:56:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:02,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:56:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:02,174 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 [2021-11-23 02:56:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:02,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:02,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654192685] [2021-11-23 02:56:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654192685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:02,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:02,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:56:02,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827989499] [2021-11-23 02:56:02,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:02,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:56:02,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:56:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:56:02,383 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:56:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:02,773 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-11-23 02:56:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:56:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-23 02:56:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:02,776 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:56:02,777 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 02:56:02,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:56:02,779 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 10 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:02,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 251 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:56:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 02:56:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-11-23 02:56:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 69 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-11-23 02:56:02,790 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 13 [2021-11-23 02:56:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-11-23 02:56:02,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:56:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-11-23 02:56:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:56:02,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:02,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:02,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:03,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:03,011 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:56:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 712803265, now seen corresponding path program 1 times [2021-11-23 02:56:03,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607478908] [2021-11-23 02:56:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:03,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:03,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:03,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:56:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:56:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:03,127 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 [2021-11-23 02:56:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:03,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:03,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:03,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607478908] [2021-11-23 02:56:03,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607478908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:03,739 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:03,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 02:56:03,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410135335] [2021-11-23 02:56:03,739 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:03,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:56:03,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:56:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:56:03,741 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:56:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:04,551 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-11-23 02:56:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:56:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-23 02:56:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:04,557 INFO L225 Difference]: With dead ends: 77 [2021-11-23 02:56:04,558 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 02:56:04,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:56:04,563 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 9 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:04,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 456 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:56:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 02:56:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-23 02:56:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 68 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-11-23 02:56:04,572 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 13 [2021-11-23 02:56:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:04,572 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-11-23 02:56:04,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:56:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-11-23 02:56:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:56:04,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:04,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:04,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:04,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:04,789 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:56:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash 150600896, now seen corresponding path program 1 times [2021-11-23 02:56:04,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:04,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785932613] [2021-11-23 02:56:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:04,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:04,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:04,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:56:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:04,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:56:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:04,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:04,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785932613] [2021-11-23 02:56:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785932613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:04,916 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:56:04,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680711969] [2021-11-23 02:56:04,917 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:56:04,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:56:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:04,919 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:56:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:04,936 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-11-23 02:56:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:56:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-23 02:56:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:04,938 INFO L225 Difference]: With dead ends: 79 [2021-11-23 02:56:04,938 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:56:04,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:04,940 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:04,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 148 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:56:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:56:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-23 02:56:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.58) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:56:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-11-23 02:56:04,949 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 15 [2021-11-23 02:56:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-11-23 02:56:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:56:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-11-23 02:56:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:56:04,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:04,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:04,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:05,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:05,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:56:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash -416014336, now seen corresponding path program 1 times [2021-11-23 02:56:05,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:05,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537660903] [2021-11-23 02:56:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:05,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:05,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:05,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:56:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:56:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:05,344 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 [2021-11-23 02:56:05,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 [2021-11-23 02:56:05,623 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 02:56:05,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-23 02:56:05,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:56:05,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 02:56:06,155 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 02:56:06,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 63 [2021-11-23 02:56:07,136 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 02:56:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 64 [2021-11-23 02:56:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:56:07,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 6 refuted. 14 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:57,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537660903] [2021-11-23 02:56:57,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537660903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167445695] [2021-11-23 02:56:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:57,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:57,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:57,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:57,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 02:56:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:57,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:56:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:57,433 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 02:56:57,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-23 02:56:57,828 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:56:57,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 02:57:02,203 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 02:57:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 46 [2021-11-23 02:57:02,921 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:57:02,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 49 [2021-11-23 02:57:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:13,740 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-23 02:57:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 75 [2021-11-23 02:57:15,282 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:57:15,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2021-11-23 02:57:21,666 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-23 02:57:21,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 91 [2021-11-23 02:57:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:57:22,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:58:04,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [167445695] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:58:04,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:58:04,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10, 11] total 33 [2021-11-23 02:58:04,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155368182] [2021-11-23 02:58:04,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:04,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:58:04,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:58:04,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:58:04,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=915, Unknown=34, NotChecked=0, Total=1122 [2021-11-23 02:58:04,380 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 7 states, 5 states have (on average 4.8) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:58:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:04,521 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-11-23 02:58:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:58:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.8) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-23 02:58:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:04,523 INFO L225 Difference]: With dead ends: 89 [2021-11-23 02:58:04,525 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:58:04,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 113 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 108.1s TimeCoverageRelationStatistics Valid=173, Invalid=915, Unknown=34, NotChecked=0, Total=1122 [2021-11-23 02:58:04,527 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 52 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:04,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 142 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2021-11-23 02:58:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:58:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-11-23 02:58:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.54) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:58:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-23 02:58:04,536 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 41 [2021-11-23 02:58:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:04,537 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-23 02:58:04,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.8) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:58:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-23 02:58:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:58:04,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:04,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:04,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 02:58:04,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:04,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:58:04,952 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-11-23 02:58:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash -416014335, now seen corresponding path program 1 times [2021-11-23 02:58:04,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:04,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706209055] [2021-11-23 02:58:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:04,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:04,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:58:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:05,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:58:05,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:05,196 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 [2021-11-23 02:58:05,208 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 [2021-11-23 02:58:05,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-23 02:58:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 10 [2021-11-23 02:58:05,613 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:58:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 02:58:05,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:58:05,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 02:58:05,930 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:58:05,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-23 02:58:06,312 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:58:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2021-11-23 02:58:07,409 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-23 02:58:07,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2021-11-23 02:58:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:58:07,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:13,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_55| (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_6| (_ BitVec 32))) (let ((.cse0 (bvadd |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_2| (_ bv4 32)))) (or (not (bvule |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_2| (_ bv4 32)) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_6|)))) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_55| (_ bv8 32)) |v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_6|))))) is different from false [2021-11-23 02:58:16,888 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_58| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_58| (_ bv8 32)) |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (not (= |v_node_create_~temp~0#1.base_58| (_ bv0 32))) (bvult |v_node_create_~temp~0#1.base_58| |c_#StackHeapBarrier|))))) is different from false [2021-11-23 03:00:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 7 times theorem prover too weak. 0 trivial. 14 not checked. [2021-11-23 03:00:04,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:00:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706209055] [2021-11-23 03:00:04,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706209055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:00:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [302329542] [2021-11-23 03:00:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:04,123 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:00:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:00:04,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:00:04,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:00:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:00:04,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:00:04,359 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 [2021-11-23 03:00:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-11-23 03:00:10,010 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:00:10,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2021-11-23 03:00:12,698 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:00:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:00:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:25,342 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-23 03:00:25,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 25 [2021-11-23 03:00:30,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:00:30,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:00:36,773 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 03:00:36,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-23 03:00:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:00:37,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 21 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:03:13,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [302329542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:03:13,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664992681] [2021-11-23 03:03:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:13,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:13,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:13,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11048a-e049-4e38-bf3c-69439281fd48/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:03:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:14,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 03:03:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:03:14,127 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 [2021-11-23 03:03:14,142 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 [2021-11-23 03:03:29,275 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:03:29,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-23 03:03:29,363 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:03:29,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-23 03:03:33,677 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 03:03:33,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 66 [2021-11-23 03:03:33,761 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-23 03:03:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 73 [2021-11-23 03:03:47,897 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-23 03:03:47,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 100 [2021-11-23 03:03:47,956 INFO L354 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2021-11-23 03:03:47,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 91 [2021-11-23 03:03:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:03:50,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:59,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_10|)) (bvule |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| .cse0))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_79|))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_10|))) (not (bvule |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| .cse1)))))))) is different from false [2021-11-23 03:04:04,564 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_80| (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)))) (and (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_80| (_ bv8 32)) |v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_10|)) (bvule |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| .cse0))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_80|)))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_79|))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_sll_prepend_~head#1.base_BEFORE_CALL_10|))) (not (bvule |v_ULTIMATE.start_sll_prepend_~head#1.offset_BEFORE_CALL_6| .cse1)))))))) is different from false [2021-11-23 03:04:17,573 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_79|)))))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store (store |c_old(#length)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv8 32)) |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv1 1)) |v_node_create_~temp~0#1.base_79|))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49|)))))))) is different from false [2021-11-23 03:08:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 20 not checked. [2021-11-23 03:08:01,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664992681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:08:01,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:08:01,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 10, 12, 13] total 62 [2021-11-23 03:08:01,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814765464] [2021-11-23 03:08:01,986 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:08:01,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-23 03:08:01,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:08:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-23 03:08:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2783, Unknown=167, NotChecked=580, Total=3906 [2021-11-23 03:08:01,991 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 63 states, 56 states have (on average 3.25) internal successors, (182), 46 states have internal predecessors, (182), 17 states have call successors, (18), 14 states have call predecessors, (18), 16 states have return successors, (18), 15 states have call predecessors, (18), 17 states have call successors, (18) [2021-11-23 03:08:20,276 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_58| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_58| (_ bv8 32)) |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (not (= |v_node_create_~temp~0#1.base_58| (_ bv0 32))) (bvult |v_node_create_~temp~0#1.base_58| |c_#StackHeapBarrier|))))) (forall ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_79|)))))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store (store |c_old(#length)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv8 32)) |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv1 1)) |v_node_create_~temp~0#1.base_79|))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49|)))))))) (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (not (= (_ bv0 32) |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from false [2021-11-23 03:08:22,303 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_#res#1.base|)))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_58| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_58| (_ bv8 32)) |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (not (= |v_node_create_~temp~0#1.base_58| (_ bv0 32))) (bvult |v_node_create_~temp~0#1.base_58| |c_#StackHeapBarrier|))))) (forall ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_79|)))))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store (store |c_old(#length)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv8 32)) |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv1 1)) |v_node_create_~temp~0#1.base_79|))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49|)))))))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) (= (store |c_old(#valid)| |c_node_create_#res#1.base| (_ bv1 1)) |c_#valid|) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (= (store |c_old(#length)| |c_node_create_#res#1.base| (_ bv8 32)) |c_#length|) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (not (= (_ bv0 32) |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|)))) is different from false [2021-11-23 03:08:59,221 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_58| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_58| (_ bv8 32)) |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (not (= |v_node_create_~temp~0#1.base_58| (_ bv0 32))) (bvult |v_node_create_~temp~0#1.base_58| |c_#StackHeapBarrier|))))) (forall ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_79|)))))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store (store |c_old(#length)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv8 32)) |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv1 1)) |v_node_create_~temp~0#1.base_79|))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49|)))))))) (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (not (= (_ bv0 32) |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from false [2021-11-23 03:09:01,243 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_#res#1.base|)))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_58| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_54| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_58| (_ bv8 32)) |v_node_create_~temp~0#1.base_54| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (not (= |v_node_create_~temp~0#1.base_58| (_ bv0 32))) (bvult |v_node_create_~temp~0#1.base_58| |c_#StackHeapBarrier|))))) (forall ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_79|)))))) (exists ((|v_node_create_~temp~0#1.base_79| (_ BitVec 32)) (|v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| .cse1)) (not (bvule .cse1 (select (store (store |c_old(#length)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv8 32)) |v_node_create_~temp~0#1.base_79| (_ bv8 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49| (_ bv1 1)) |v_node_create_~temp~0#1.base_79|))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_sll_create_#t~ret5#1.base_49|)))))))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|)))))) (= (store |c_old(#valid)| |c_node_create_#res#1.base| (_ bv1 1)) |c_#valid|) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (= (store |c_old(#length)| |c_node_create_#res#1.base| (_ bv8 32)) |c_#length|) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (not (= (_ bv0 32) |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|)))) is different from false