./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P --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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:17:15,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:17:15,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:17:15,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:17:15,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:17:15,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:17:15,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:17:15,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:17:15,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:17:15,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:17:15,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:17:15,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:17:15,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:17:15,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:17:15,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:17:15,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:17:15,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:17:15,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:17:15,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:17:15,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:17:15,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:17:15,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:17:15,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:17:15,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:17:15,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:17:15,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:17:15,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:17:15,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:17:15,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:17:15,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:17:15,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:17:15,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:17:15,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:17:15,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:17:15,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:17:15,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:17:15,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:17:15,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:17:15,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:17:15,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:17:15,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:17:15,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:17:15,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:17:15,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:17:15,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:17:15,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:17:15,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:17:15,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:17:15,994 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:17:15,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:17:15,994 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:17:15,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:17:15,996 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:17:15,996 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:17:15,996 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:17:15,996 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:17:15,997 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:17:15,997 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:17:15,997 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:17:15,997 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:17:15,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:17:15,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:17:15,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:17:15,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:17:15,999 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:17:15,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:17:16,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:17:16,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:17:16,000 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:17:16,000 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:17:16,001 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:17:16,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:17:16,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:17:16,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:17:16,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:17:16,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:17:16,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:17:16,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:17:16,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:17:16,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:17:16,003 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:17:16,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:17:16,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:17:16,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:17:16,005 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_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2021-11-21 01:17:16,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:17:16,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:17:16,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:17:16,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:17:16,357 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:17:16,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-11-21 01:17:16,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/ce10064df/414b60e14e8b438ba1db3009407ff628/FLAG794e63ba5 [2021-11-21 01:17:17,086 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:17:17,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-11-21 01:17:17,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/ce10064df/414b60e14e8b438ba1db3009407ff628/FLAG794e63ba5 [2021-11-21 01:17:17,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/ce10064df/414b60e14e8b438ba1db3009407ff628 [2021-11-21 01:17:17,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:17:17,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:17:17,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:17:17,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:17:17,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:17:17,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665cb372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17, skipping insertion in model container [2021-11-21 01:17:17,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:17:17,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:17:17,759 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_cf687171-d6c8-4f33-bf30-f383b23783a5/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2021-11-21 01:17:17,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:17:17,783 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:17:17,855 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_cf687171-d6c8-4f33-bf30-f383b23783a5/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2021-11-21 01:17:17,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:17:17,887 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:17:17,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17 WrapperNode [2021-11-21 01:17:17,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:17:17,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:17:17,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:17:17,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:17:17,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,939 INFO L137 Inliner]: procedures = 127, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 164 [2021-11-21 01:17:17,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:17:17,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:17:17,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:17:17,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:17:17,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:17:17,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:17:17,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:17:17,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:17:17,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (1/1) ... [2021-11-21 01:17:17,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:17:17,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:17:18,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:17:18,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:17:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:17:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:17:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-21 01:17:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-21 01:17:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:17:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:17:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:17:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:17:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:17:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:17:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:17:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:17:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:17:18,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:17:18,245 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:17:18,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:17:18,681 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:17:18,751 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:17:18,754 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 01:17:18,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:17:18 BoogieIcfgContainer [2021-11-21 01:17:18,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:17:18,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:17:18,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:17:18,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:17:18,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:17:17" (1/3) ... [2021-11-21 01:17:18,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fadb3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:17:18, skipping insertion in model container [2021-11-21 01:17:18,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:17" (2/3) ... [2021-11-21 01:17:18,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fadb3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:17:18, skipping insertion in model container [2021-11-21 01:17:18,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:17:18" (3/3) ... [2021-11-21 01:17:18,767 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2021-11-21 01:17:18,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:17:18,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2021-11-21 01:17:18,832 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:17:18,844 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 [2021-11-21 01:17:18,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2021-11-21 01:17:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 110 states have internal predecessors, (124), 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) [2021-11-21 01:17:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:17:18,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:18,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:17:18,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash 246748118, now seen corresponding path program 1 times [2021-11-21 01:17:18,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:18,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937721075] [2021-11-21 01:17:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:18,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:19,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937721075] [2021-11-21 01:17:19,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937721075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:19,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:17:19,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234378716] [2021-11-21 01:17:19,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:19,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:17:19,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:17:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:17:19,191 INFO L87 Difference]: Start difference. First operand has 115 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 110 states have internal predecessors, (124), 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:17:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:19,403 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-21 01:17:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:17:19,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2021-11-21 01:17:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:19,415 INFO L225 Difference]: With dead ends: 113 [2021-11-21 01:17:19,415 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 01:17:19,417 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 [2021-11-21 01:17:19,421 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:19,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:17:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 01:17:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-21 01:17:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 106 states have internal predecessors, (115), 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) [2021-11-21 01:17:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-11-21 01:17:19,467 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 5 [2021-11-21 01:17:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:19,468 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-11-21 01:17:19,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:17:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-11-21 01:17:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:17:19,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:19,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:17:19,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:17:19,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash 246748119, now seen corresponding path program 1 times [2021-11-21 01:17:19,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:19,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498824383] [2021-11-21 01:17:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:19,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:19,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498824383] [2021-11-21 01:17:19,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498824383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:19,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:19,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:17:19,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427561684] [2021-11-21 01:17:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:19,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:17:19,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:17:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:17:19,528 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:17:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:19,632 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-21 01:17:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:17:19,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2021-11-21 01:17:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:19,635 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:17:19,635 INFO L226 Difference]: Without dead ends: 109 [2021-11-21 01:17:19,636 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 [2021-11-21 01:17:19,637 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:19,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 164 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:17:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-21 01:17:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-21 01:17:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 51 states have (on average 2.215686274509804) internal successors, (113), 104 states have internal predecessors, (113), 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) [2021-11-21 01:17:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-11-21 01:17:19,650 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 5 [2021-11-21 01:17:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:19,650 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-11-21 01:17:19,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-21 01:17:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-11-21 01:17:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:17:19,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:19,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:19,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:17:19,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1094018592, now seen corresponding path program 1 times [2021-11-21 01:17:19,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:19,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955077830] [2021-11-21 01:17:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:19,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:19,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:19,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955077830] [2021-11-21 01:17:19,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955077830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:19,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:19,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:17:19,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766743274] [2021-11-21 01:17:19,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:19,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:17:19,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:17:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:17:19,703 INFO L87 Difference]: Start difference. First operand 109 states and 119 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) [2021-11-21 01:17:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:19,743 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-11-21 01:17:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:17:19,744 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 [2021-11-21 01:17:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:19,745 INFO L225 Difference]: With dead ends: 115 [2021-11-21 01:17:19,746 INFO L226 Difference]: Without dead ends: 115 [2021-11-21 01:17:19,746 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 [2021-11-21 01:17:19,748 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 4 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:19,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 203 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:17:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-21 01:17:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2021-11-21 01:17:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 105 states have internal predecessors, (114), 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) [2021-11-21 01:17:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-11-21 01:17:19,760 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 10 [2021-11-21 01:17:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:19,761 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-11-21 01:17:19,761 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) [2021-11-21 01:17:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-11-21 01:17:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:17:19,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:19,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:19,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:17:19,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash 727488831, now seen corresponding path program 1 times [2021-11-21 01:17:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338005946] [2021-11-21 01:17:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:19,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:17:19,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:19,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338005946] [2021-11-21 01:17:19,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338005946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:19,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:19,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:17:19,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331725142] [2021-11-21 01:17:19,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:19,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:17:19,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:19,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:17:19,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:17:19,846 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:17:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:20,052 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-11-21 01:17:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:17:20,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-21 01:17:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:20,055 INFO L225 Difference]: With dead ends: 110 [2021-11-21 01:17:20,056 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 01:17:20,056 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 [2021-11-21 01:17:20,057 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:20,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:17:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 01:17:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-21 01:17:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 52 states have (on average 2.173076923076923) internal successors, (113), 104 states have internal predecessors, (113), 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) [2021-11-21 01:17:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-11-21 01:17:20,071 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 17 [2021-11-21 01:17:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:20,072 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-11-21 01:17:20,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:17:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-11-21 01:17:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:17:20,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:20,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:20,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:17:20,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash 727488832, now seen corresponding path program 1 times [2021-11-21 01:17:20,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:20,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986182994] [2021-11-21 01:17:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:20,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:20,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:20,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986182994] [2021-11-21 01:17:20,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986182994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:20,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:20,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:17:20,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189874970] [2021-11-21 01:17:20,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:20,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:17:20,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:20,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:17:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:17:20,214 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:17:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:20,433 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-11-21 01:17:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:17:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-21 01:17:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:20,436 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:17:20,436 INFO L226 Difference]: Without dead ends: 109 [2021-11-21 01:17:20,436 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 [2021-11-21 01:17:20,439 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 7 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:20,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:17:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-21 01:17:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-11-21 01:17:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 103 states have internal predecessors, (112), 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) [2021-11-21 01:17:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-11-21 01:17:20,469 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 17 [2021-11-21 01:17:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:20,470 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-11-21 01:17:20,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:17:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-11-21 01:17:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:17:20,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:20,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:20,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:17:20,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash -962684734, now seen corresponding path program 1 times [2021-11-21 01:17:20,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:20,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177560289] [2021-11-21 01:17:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:20,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:20,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:20,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177560289] [2021-11-21 01:17:20,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177560289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:17:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985787599] [2021-11-21 01:17:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:20,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:17:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:17:20,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:17:20,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:17:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:17:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:20,817 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 [2021-11-21 01:17:20,941 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:17:20,941 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 14 treesize of output 9 [2021-11-21 01:17:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:21,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:17:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985787599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:21,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:17:21,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 12 [2021-11-21 01:17:21,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824273599] [2021-11-21 01:17:21,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:21,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:17:21,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:21,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:17:21,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:17:21,018 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:17:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:21,390 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2021-11-21 01:17:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:17:21,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 2 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 19 [2021-11-21 01:17:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:21,392 INFO L225 Difference]: With dead ends: 126 [2021-11-21 01:17:21,392 INFO L226 Difference]: Without dead ends: 126 [2021-11-21 01:17:21,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:17:21,394 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 197 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:21,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 379 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:17:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-21 01:17:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2021-11-21 01:17:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 102 states have internal predecessors, (111), 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) [2021-11-21 01:17:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-11-21 01:17:21,402 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 19 [2021-11-21 01:17:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:21,402 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-11-21 01:17:21,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:17:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-11-21 01:17:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:17:21,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:21,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:21,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:21,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:17:21,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash -962684733, now seen corresponding path program 1 times [2021-11-21 01:17:21,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:21,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263692952] [2021-11-21 01:17:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:21,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:21,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263692952] [2021-11-21 01:17:21,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263692952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:17:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468972802] [2021-11-21 01:17:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:21,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:17:21,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:17:21,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:17:21,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:17:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:21,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 01:17:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:21,942 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 [2021-11-21 01:17:22,107 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 01:17:22,108 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 14 treesize of output 9 [2021-11-21 01:17:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:22,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:17:22,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468972802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:17:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448621731] [2021-11-21 01:17:22,327 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 01:17:22,328 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:17:22,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:17:22,338 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:17:22,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:17:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:22,446 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 [2021-11-21 01:17:22,592 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-21 01:17:22,593 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 35 treesize of output 41 [2021-11-21 01:17:22,664 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 [2021-11-21 01:17:22,672 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 [2021-11-21 01:17:22,707 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 15 treesize of output 1 [2021-11-21 01:17:22,719 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 [2021-11-21 01:17:22,730 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 [2021-11-21 01:17:22,759 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 [2021-11-21 01:17:22,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:22,772 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 [2021-11-21 01:17:22,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:22,795 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 [2021-11-21 01:17:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2021-11-21 01:17:23,013 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-21 01:17:23,013 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 35 treesize of output 41 [2021-11-21 01:17:23,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:23,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2021-11-21 01:17:23,643 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:23,644 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 24 treesize of output 20 [2021-11-21 01:17:23,702 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 [2021-11-21 01:17:23,715 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 [2021-11-21 01:17:23,726 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 [2021-11-21 01:17:23,833 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 [2021-11-21 01:17:23,861 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 [2021-11-21 01:17:23,953 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:23,953 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 24 treesize of output 20 [2021-11-21 01:17:24,032 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 [2021-11-21 01:17:24,052 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 [2021-11-21 01:17:24,104 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 [2021-11-21 01:17:24,173 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 [2021-11-21 01:17:24,186 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 [2021-11-21 01:17:24,450 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 19 treesize of output 11 [2021-11-21 01:17:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:24,477 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 23 treesize of output 11 [2021-11-21 01:17:24,506 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 19 treesize of output 11 [2021-11-21 01:17:24,791 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:24,791 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 24 treesize of output 20 [2021-11-21 01:17:24,866 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 [2021-11-21 01:17:24,895 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 [2021-11-21 01:17:24,909 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 [2021-11-21 01:17:24,939 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 [2021-11-21 01:17:25,016 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 [2021-11-21 01:17:25,101 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:25,101 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 24 treesize of output 20 [2021-11-21 01:17:25,149 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 [2021-11-21 01:17:25,161 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 [2021-11-21 01:17:25,192 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 [2021-11-21 01:17:25,241 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 [2021-11-21 01:17:25,297 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 [2021-11-21 01:17:25,557 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 19 treesize of output 11 [2021-11-21 01:17:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:17:25,572 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 23 treesize of output 11 [2021-11-21 01:17:25,621 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 19 treesize of output 11 [2021-11-21 01:17:25,938 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:25,938 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 24 treesize of output 20 [2021-11-21 01:17:25,978 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 [2021-11-21 01:17:26,024 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 [2021-11-21 01:17:26,046 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 [2021-11-21 01:17:26,119 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 [2021-11-21 01:17:26,140 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 [2021-11-21 01:17:26,200 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:26,201 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 24 treesize of output 20 [2021-11-21 01:17:26,284 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 [2021-11-21 01:17:26,313 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 [2021-11-21 01:17:26,410 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 [2021-11-21 01:17:26,442 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 [2021-11-21 01:17:26,456 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 [2021-11-21 01:17:26,742 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:17:26,742 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 24 treesize of output 20 [2021-11-21 01:17:27,103 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-21 01:17:27,103 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 35 treesize of output 41 [2021-11-21 01:17:27,143 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 88 for LOIs [2021-11-21 01:17:29,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:29,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:17:29,271 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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) 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:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java: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) [2021-11-21 01:17:29,274 INFO L158 Benchmark]: Toolchain (without parser) took 11916.39ms. Allocated memory was 127.9MB in the beginning and 157.3MB in the end (delta: 29.4MB). Free memory was 93.5MB in the beginning and 120.9MB in the end (delta: -27.4MB). Peak memory consumption was 3.0MB. Max. memory is 16.1GB. [2021-11-21 01:17:29,274 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 46.8MB in the beginning and 46.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:17:29,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 527.73ms. Allocated memory is still 127.9MB. Free memory was 93.5MB in the beginning and 94.4MB in the end (delta: -906.7kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 01:17:29,275 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.76ms. Allocated memory is still 127.9MB. Free memory was 94.4MB in the beginning and 92.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:17:29,275 INFO L158 Benchmark]: Boogie Preprocessor took 35.54ms. Allocated memory is still 127.9MB. Free memory was 92.0MB in the beginning and 89.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:17:29,276 INFO L158 Benchmark]: RCFGBuilder took 780.22ms. Allocated memory is still 127.9MB. Free memory was 89.9MB in the beginning and 65.8MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-21 01:17:29,276 INFO L158 Benchmark]: TraceAbstraction took 10514.48ms. Allocated memory was 127.9MB in the beginning and 157.3MB in the end (delta: 29.4MB). Free memory was 65.5MB in the beginning and 120.9MB in the end (delta: -55.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:17:29,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 46.8MB in the beginning and 46.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 527.73ms. Allocated memory is still 127.9MB. Free memory was 93.5MB in the beginning and 94.4MB in the end (delta: -906.7kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.76ms. Allocated memory is still 127.9MB. Free memory was 94.4MB in the beginning and 92.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.54ms. Allocated memory is still 127.9MB. Free memory was 92.0MB in the beginning and 89.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 780.22ms. Allocated memory is still 127.9MB. Free memory was 89.9MB in the beginning and 65.8MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 10514.48ms. Allocated memory was 127.9MB in the beginning and 157.3MB in the end (delta: 29.4MB). Free memory was 65.5MB in the beginning and 120.9MB in the end (delta: -55.4MB). There was no memory consumed. 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. [2021-11-21 01:17:29,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/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_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P --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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:17:31,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:17:31,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:17:31,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:17:31,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:17:31,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:17:31,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:17:31,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:17:31,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:17:31,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:17:31,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:17:31,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:17:31,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:17:31,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:17:31,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:17:31,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:17:31,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:17:31,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:17:31,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:17:31,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:17:31,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:17:31,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:17:31,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:17:31,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:17:31,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:17:31,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:17:31,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:17:31,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:17:31,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:17:31,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:17:31,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:17:31,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:17:31,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:17:31,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:17:31,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:17:31,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:17:31,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:17:31,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:17:31,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:17:31,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:17:31,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:17:31,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:17:31,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:17:31,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:17:31,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:17:31,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:17:31,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:17:31,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:17:31,989 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:17:31,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:17:31,990 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:17:31,990 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:17:31,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:17:31,991 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:17:31,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:17:31,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:17:31,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:17:31,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:17:31,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:17:31,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:17:31,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:17:31,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:17:31,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:17:31,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:17:31,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:17:31,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:17:31,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:17:31,995 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:17:31,995 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:17:31,995 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:17:31,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:17:31,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:17:31,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:17:31,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:17:31,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:17:31,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:17:31,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:17:31,997 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:17:31,998 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:17:31,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:17:31,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:17:31,998 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_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2021-11-21 01:17:32,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:17:32,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:17:32,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:17:32,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:17:32,479 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:17:32,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-11-21 01:17:32,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/be767f1fb/71c40e7a449249cdb3bfda2b46082977/FLAG6397906c5 [2021-11-21 01:17:33,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:17:33,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-11-21 01:17:33,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/be767f1fb/71c40e7a449249cdb3bfda2b46082977/FLAG6397906c5 [2021-11-21 01:17:33,389 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/data/be767f1fb/71c40e7a449249cdb3bfda2b46082977 [2021-11-21 01:17:33,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:17:33,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:17:33,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:17:33,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:17:33,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:17:33,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588c6e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33, skipping insertion in model container [2021-11-21 01:17:33,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:17:33,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:17:33,816 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_cf687171-d6c8-4f33-bf30-f383b23783a5/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2021-11-21 01:17:33,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:17:33,831 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:17:33,876 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_cf687171-d6c8-4f33-bf30-f383b23783a5/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2021-11-21 01:17:33,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:17:33,911 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:17:33,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33 WrapperNode [2021-11-21 01:17:33,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:17:33,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:17:33,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:17:33,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:17:33,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,968 INFO L137 Inliner]: procedures = 130, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2021-11-21 01:17:33,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:17:33,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:17:33,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:17:33,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:17:33,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:33,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:34,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:34,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:34,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:17:34,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:17:34,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:17:34,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:17:34,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (1/1) ... [2021-11-21 01:17:34,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:17:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:17:34,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:17:34,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:17:34,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:17:34,121 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-21 01:17:34,121 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-21 01:17:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:17:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:17:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:17:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:17:34,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:17:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:17:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:17:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:17:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:17:34,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:17:34,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:17:34,309 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:17:34,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:17:34,944 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:17:34,952 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:17:34,952 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 01:17:34,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:17:34 BoogieIcfgContainer [2021-11-21 01:17:34,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:17:34,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:17:34,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:17:34,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:17:34,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:17:33" (1/3) ... [2021-11-21 01:17:34,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d4ebbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:17:34, skipping insertion in model container [2021-11-21 01:17:34,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:17:33" (2/3) ... [2021-11-21 01:17:34,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d4ebbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:17:34, skipping insertion in model container [2021-11-21 01:17:34,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:17:34" (3/3) ... [2021-11-21 01:17:34,962 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2021-11-21 01:17:34,968 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:17:34,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2021-11-21 01:17:35,013 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:17:35,020 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 [2021-11-21 01:17:35,021 INFO L340 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2021-11-21 01:17:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 69 states have (on average 2.072463768115942) internal successors, (143), 127 states have internal predecessors, (143), 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) [2021-11-21 01:17:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:17:35,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:35,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:17:35,065 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash 895983381, now seen corresponding path program 1 times [2021-11-21 01:17:35,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520320584] [2021-11-21 01:17:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:35,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:35,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:35,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:17:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:35,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:17:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:35,296 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 [2021-11-21 01:17:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:35,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:17:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:35,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:17:35,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520320584] [2021-11-21 01:17:35,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520320584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:35,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:35,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:17:35,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70075160] [2021-11-21 01:17:35,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:35,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:17:35,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:17:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:17:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:17:35,403 INFO L87 Difference]: Start difference. First operand has 132 states, 69 states have (on average 2.072463768115942) internal successors, (143), 127 states have internal predecessors, (143), 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) 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) [2021-11-21 01:17:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:35,685 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-11-21 01:17:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:17:35,687 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 [2021-11-21 01:17:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:35,696 INFO L225 Difference]: With dead ends: 130 [2021-11-21 01:17:35,699 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 01:17:35,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:17:35,705 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:35,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 207 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:17:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 01:17:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-21 01:17:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 67 states have (on average 1.955223880597015) internal successors, (131), 122 states have internal predecessors, (131), 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) [2021-11-21 01:17:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-11-21 01:17:35,789 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 6 [2021-11-21 01:17:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:35,789 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-11-21 01:17:35,790 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) [2021-11-21 01:17:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-11-21 01:17:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:17:35,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:35,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:17:35,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:35,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:17:35,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash 895983382, now seen corresponding path program 1 times [2021-11-21 01:17:35,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:35,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100764471] [2021-11-21 01:17:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:35,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:35,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:36,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:17:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:17:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:36,116 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 [2021-11-21 01:17:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:36,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:17:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:36,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:17:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100764471] [2021-11-21 01:17:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100764471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:36,236 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:36,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 01:17:36,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039285056] [2021-11-21 01:17:36,236 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:36,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:17:36,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:17:36,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:17:36,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:17:36,239 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-21 01:17:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:36,811 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-21 01:17:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:17:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 [2021-11-21 01:17:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:36,816 INFO L225 Difference]: With dead ends: 125 [2021-11-21 01:17:36,816 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 01:17:36,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:17:36,818 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:36,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 287 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:17:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 01:17:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-21 01:17:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 120 states have internal predecessors, (129), 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) [2021-11-21 01:17:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-11-21 01:17:36,846 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 6 [2021-11-21 01:17:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:36,847 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-11-21 01:17:36,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-21 01:17:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-11-21 01:17:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:17:36,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:36,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:36,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:37,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:17:37,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash 229520599, now seen corresponding path program 1 times [2021-11-21 01:17:37,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:37,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469940051] [2021-11-21 01:17:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:37,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:37,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:37,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:37,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:17:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:17:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:37,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:17:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:37,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:17:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469940051] [2021-11-21 01:17:37,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469940051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:37,303 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:37,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:17:37,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125202093] [2021-11-21 01:17:37,303 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:37,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:17:37,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:17:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:17:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:17:37,305 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-21 01:17:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:37,323 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-11-21 01:17:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:17:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 13 [2021-11-21 01:17:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:37,326 INFO L225 Difference]: With dead ends: 132 [2021-11-21 01:17:37,326 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 01:17:37,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:17:37,328 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 9 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:37,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 386 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:17:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 01:17:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-11-21 01:17:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.911764705882353) internal successors, (130), 121 states have internal predecessors, (130), 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) [2021-11-21 01:17:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-11-21 01:17:37,341 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 13 [2021-11-21 01:17:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:37,342 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-11-21 01:17:37,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-21 01:17:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-11-21 01:17:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:17:37,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:37,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:37,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:37,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:17:37,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2102414876, now seen corresponding path program 1 times [2021-11-21 01:17:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943383351] [2021-11-21 01:17:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:37,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:37,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:37,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:17:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:37,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:17:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:37,715 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 [2021-11-21 01:17:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:37,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:17:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:37,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:17:37,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943383351] [2021-11-21 01:17:37,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943383351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:37,901 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:37,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-21 01:17:37,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912020521] [2021-11-21 01:17:37,902 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:17:37,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:17:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:17:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:17:37,904 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:17:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:38,416 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-11-21 01:17:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:17:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-21 01:17:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:38,422 INFO L225 Difference]: With dead ends: 126 [2021-11-21 01:17:38,422 INFO L226 Difference]: Without dead ends: 126 [2021-11-21 01:17:38,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:17:38,423 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 12 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:38,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 400 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:17:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-21 01:17:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-21 01:17:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 120 states have internal predecessors, (129), 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) [2021-11-21 01:17:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-11-21 01:17:38,444 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 22 [2021-11-21 01:17:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:38,445 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-11-21 01:17:38,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:17:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-11-21 01:17:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:17:38,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:38,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:38,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:38,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:17:38,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2102414877, now seen corresponding path program 1 times [2021-11-21 01:17:38,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:38,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706025281] [2021-11-21 01:17:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:38,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:38,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:38,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:17:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:17:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:38,809 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 [2021-11-21 01:17:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:38,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:17:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:17:39,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:17:39,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706025281] [2021-11-21 01:17:39,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706025281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:39,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:39,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:17:39,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031764629] [2021-11-21 01:17:39,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:39,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:17:39,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:17:39,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:17:39,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:17:39,339 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:17:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:40,768 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-11-21 01:17:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:17:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-21 01:17:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:40,773 INFO L225 Difference]: With dead ends: 125 [2021-11-21 01:17:40,774 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 01:17:40,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:17:40,775 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:40,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 646 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 01:17:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 01:17:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-11-21 01:17:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 68 states have (on average 1.8823529411764706) internal successors, (128), 119 states have internal predecessors, (128), 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) [2021-11-21 01:17:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-11-21 01:17:40,784 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 22 [2021-11-21 01:17:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-11-21 01:17:40,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:17:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-11-21 01:17:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:17:40,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:40,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:40,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:40,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:17:40,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:17:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash -466517819, now seen corresponding path program 1 times [2021-11-21 01:17:40,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:40,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804000551] [2021-11-21 01:17:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:40,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:41,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:41,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:17:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:17:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:41,160 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 [2021-11-21 01:17:41,408 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:17:41,408 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 24 treesize of output 31 [2021-11-21 01:17:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:41,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:04,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:18:04,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804000551] [2021-11-21 01:18:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804000551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:18:04,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [58146070] [2021-11-21 01:18:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:04,249 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:18:04,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:18:04,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:18:04,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-21 01:18:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:04,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:18:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:04,455 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 [2021-11-21 01:18:08,591 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:18:08,591 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 16 treesize of output 21 [2021-11-21 01:18:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:18:08,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:18:17,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [58146070] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:18:17,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:18:17,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 6] total 18 [2021-11-21 01:18:17,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039614899] [2021-11-21 01:18:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:17,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:18:17,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:18:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:18:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=271, Unknown=12, NotChecked=0, Total=342 [2021-11-21 01:18:17,018 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:18:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:19,626 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-11-21 01:18:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:18:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 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 25 [2021-11-21 01:18:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:19,627 INFO L225 Difference]: With dead ends: 141 [2021-11-21 01:18:19,628 INFO L226 Difference]: Without dead ends: 141 [2021-11-21 01:18:19,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=69, Invalid=298, Unknown=13, NotChecked=0, Total=380 [2021-11-21 01:18:19,629 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 112 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:19,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 417 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 323 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2021-11-21 01:18:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-21 01:18:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2021-11-21 01:18:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 118 states have internal predecessors, (127), 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) [2021-11-21 01:18:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-11-21 01:18:19,636 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 25 [2021-11-21 01:18:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:19,636 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-11-21 01:18:19,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:18:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-11-21 01:18:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:18:19,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:19,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:19,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:19,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-21 01:18:20,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:18:20,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:18:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash -466517818, now seen corresponding path program 1 times [2021-11-21 01:18:20,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:18:20,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657056157] [2021-11-21 01:18:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:20,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:18:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:18:20,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:18:20,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:18:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:20,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:18:20,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:20,186 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 [2021-11-21 01:18:20,193 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 [2021-11-21 01:18:20,492 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:18:20,493 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 [2021-11-21 01:18:20,503 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:20,504 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 27 [2021-11-21 01:18:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:20,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:26,311 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) is different from false [2021-11-21 01:18:28,325 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) is different from true [2021-11-21 01:18:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-21 01:18:46,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:18:46,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657056157] [2021-11-21 01:18:46,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657056157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:18:46,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [900814294] [2021-11-21 01:18:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:46,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:18:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:18:46,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:18:46,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:18:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:18:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:46,895 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 [2021-11-21 01:18:46,915 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 [2021-11-21 01:18:47,196 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:18:47,197 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 32 treesize of output 34 [2021-11-21 01:18:47,213 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:47,214 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 31 treesize of output 31 [2021-11-21 01:18:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:05,596 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_57|)))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) is different from false [2021-11-21 01:19:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [900814294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846865357] [2021-11-21 01:19:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:06,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:06,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:06,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:19:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:06,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:19:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:06,331 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 [2021-11-21 01:19:06,941 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:19:06,941 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 31 treesize of output 33 [2021-11-21 01:19:06,955 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:19:06,955 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 30 treesize of output 30 [2021-11-21 01:19:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:07,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:27,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_65|)))))) is different from false [2021-11-21 01:19:27,920 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:19:27,921 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 34 treesize of output 33 [2021-11-21 01:19:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:30,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846865357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:30,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:19:30,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 21 [2021-11-21 01:19:30,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859425505] [2021-11-21 01:19:30,312 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:19:30,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:19:30,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:19:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:19:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=280, Unknown=19, NotChecked=108, Total=462 [2021-11-21 01:19:30,315 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:19:58,889 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_57|)))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) (= |c_old(#valid)| |c_#valid|) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse2) (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_65|)))))) (= |c_#length| |c_old(#length)|)) is different from false [2021-11-21 01:20:00,908 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_57|)))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_49| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_49|)))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse2) (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_49| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse3 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse3)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse4) (bvule .cse4 (select (store |c_#length| |v_node_create_~temp~0#1.base_65| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse5 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_65|))))))) is different from false [2021-11-21 01:20:02,946 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) (= (_ bv8 32) (select |c_#length| |c_node_create_~temp~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse4) (bvule .cse4 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse5 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))))))))) is different from false [2021-11-21 01:20:04,974 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|)) (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse0))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_6|))) (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_2| .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|)))))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_4| .cse3) (bvule .cse3 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_8|)))))) (= |c_node_create_#res#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (or (let ((.cse4 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse4) (bvule .cse4 (select |c_#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|)))) (exists ((|v_node_create_~temp~0#1.base_48| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_48|))))) (let ((.cse5 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_create_~last~0#1.offset_BEFORE_CALL_6| .cse5)) (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_48| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_BEFORE_CALL_10|))))))))) (= (_ bv8 32) (select |c_#length| |c_node_create_#res#1.base|))) is different from false [2021-11-21 01:20:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:06,099 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2021-11-21 01:20:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:20:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2021-11-21 01:20:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:06,103 INFO L225 Difference]: With dead ends: 151 [2021-11-21 01:20:06,103 INFO L226 Difference]: Without dead ends: 151 [2021-11-21 01:20:06,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 92.8s TimeCoverageRelationStatistics Valid=79, Invalid=339, Unknown=30, NotChecked=308, Total=756 [2021-11-21 01:20:06,105 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 7 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 885 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:06,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 890 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 885 Unchecked, 1.1s Time] [2021-11-21 01:20:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-21 01:20:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-21 01:20:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 89 states have (on average 1.6853932584269662) internal successors, (150), 139 states have internal predecessors, (150), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:20:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2021-11-21 01:20:06,115 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 25 [2021-11-21 01:20:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:06,116 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2021-11-21 01:20:06,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 16 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:20:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2021-11-21 01:20:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:20:06,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:06,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:06,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:06,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-21 01:20:06,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:06,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:20:06,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:20:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash -342690401, now seen corresponding path program 1 times [2021-11-21 01:20:06,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:20:06,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448652182] [2021-11-21 01:20:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:06,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:20:06,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:20:06,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:20:06,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:20:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:06,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:20:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:06,981 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 [2021-11-21 01:20:07,021 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 13 treesize of output 11 [2021-11-21 01:20:07,250 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:20:07,250 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 24 treesize of output 31 [2021-11-21 01:20:07,491 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:20:07,491 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 39 treesize of output 35 [2021-11-21 01:20:07,690 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-21 01:20:07,690 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 54 treesize of output 65 [2021-11-21 01:20:08,718 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-21 01:20:08,718 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 54 treesize of output 65 [2021-11-21 01:20:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:20:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 14 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:20:53,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:20:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448652182] [2021-11-21 01:20:53,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448652182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1688005010] [2021-11-21 01:20:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:53,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:20:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:20:53,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:20:53,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-21 01:20:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:54,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:20:54,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:54,375 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 01:20:54,376 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 14 treesize of output 19 [2021-11-21 01:20:54,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:20:54,870 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 21 treesize of output 17 [2021-11-21 01:20:55,116 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-21 01:20:55,117 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 26 treesize of output 37 [2021-11-21 01:20:55,466 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:20:55,466 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 39 treesize of output 33 [2021-11-21 01:20:59,579 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-21 01:20:59,579 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 48 treesize of output 65 [2021-11-21 01:21:00,492 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:21:00,492 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 39 treesize of output 33 [2021-11-21 01:21:00,839 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-21 01:21:00,839 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 54 treesize of output 71 [2021-11-21 01:21:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:21:01,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:21:08,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1688005010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:08,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:21:08,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [10, 10] total 26 [2021-11-21 01:21:08,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631387986] [2021-11-21 01:21:08,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:08,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:21:08,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:21:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:21:08,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=568, Unknown=21, NotChecked=0, Total=702 [2021-11-21 01:21:08,418 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand has 15 states, 11 states have (on average 4.090909090909091) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-21 01:21:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:17,033 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2021-11-21 01:21:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:21:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 4.090909090909091) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2021-11-21 01:21:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:17,035 INFO L225 Difference]: With dead ends: 166 [2021-11-21 01:21:17,035 INFO L226 Difference]: Without dead ends: 166 [2021-11-21 01:21:17,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=129, Invalid=658, Unknown=25, NotChecked=0, Total=812 [2021-11-21 01:21:17,037 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 105 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:17,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 307 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2021-11-21 01:21:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-21 01:21:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 145. [2021-11-21 01:21:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 89 states have (on average 1.651685393258427) internal successors, (147), 136 states have internal predecessors, (147), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:21:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-11-21 01:21:17,045 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 37 [2021-11-21 01:21:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-11-21 01:21:17,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 4.090909090909091) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-21 01:21:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-11-21 01:21:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:21:17,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:17,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:17,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:21:17,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:21:17,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:21:17,450 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:21:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -342690400, now seen corresponding path program 1 times [2021-11-21 01:21:17,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:21:17,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787886740] [2021-11-21 01:21:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:17,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:21:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:21:17,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:21:17,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:21:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:17,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:21:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:17,623 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 [2021-11-21 01:21:17,636 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 [2021-11-21 01:21:17,689 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 19 treesize of output 17 [2021-11-21 01:21:17,697 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 [2021-11-21 01:21:18,026 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:21:18,027 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 27 treesize of output 29 [2021-11-21 01:21:18,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:21:18,039 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 26 treesize of output 22 [2021-11-21 01:21:18,216 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:21:18,217 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 [2021-11-21 01:21:18,535 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 01:21:18,536 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 29 treesize of output 34 [2021-11-21 01:21:19,565 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-21 01:21:19,566 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 23 treesize of output 32 [2021-11-21 01:21:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:19,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:41,835 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_102| (_ 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_102| (_ 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_106| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_102| (_ 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_106| (_ bv8 32)) |v_node_create_~temp~0#1.base_102| (_ 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|)))) (bvult |v_node_create_~temp~0#1.base_106| |c_#StackHeapBarrier|))))) is different from false [2021-11-21 01:23:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 9 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-21 01:23:20,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:23:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787886740] [2021-11-21 01:23:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787886740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785743234] [2021-11-21 01:23:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:20,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:23:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:23:20,367 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:23:20,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-21 01:23:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:23:20,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:20,724 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 [2021-11-21 01:23:24,935 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 [2021-11-21 01:23:25,147 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:23:25,148 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 [2021-11-21 01:23:29,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:23:29,066 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 [2021-11-21 01:23:33,729 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 01:23:33,730 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 23 treesize of output 28 [2021-11-21 01:23:35,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:23:35,602 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 [2021-11-21 01:23:35,901 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 01:23:35,901 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 [2021-11-21 01:23:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:23:36,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:39,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_116| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_116| |c_#StackHeapBarrier|) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_4|))) (or (not (bvule |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_4| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_116| (_ bv8 32)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|)) (bvule |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_4| .cse1))))) is different from false [2021-11-21 01:26:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 9 times theorem prover too weak. 1 trivial. 12 not checked. [2021-11-21 01:26:11,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785743234] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:11,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:11,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11, 10] total 34 [2021-11-21 01:26:11,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70761497] [2021-11-21 01:26:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:11,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:26:11,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:26:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=820, Unknown=86, NotChecked=126, Total=1190 [2021-11-21 01:26:11,976 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:12,833 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2021-11-21 01:26:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:26:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-21 01:26:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:12,836 INFO L225 Difference]: With dead ends: 145 [2021-11-21 01:26:12,836 INFO L226 Difference]: Without dead ends: 145 [2021-11-21 01:26:12,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 244.9s TimeCoverageRelationStatistics Valid=158, Invalid=820, Unknown=86, NotChecked=126, Total=1190 [2021-11-21 01:26:12,838 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 6 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:12,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 567 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 220 Unchecked, 0.8s Time] [2021-11-21 01:26:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-21 01:26:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-11-21 01:26:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 89 states have (on average 1.6404494382022472) internal successors, (146), 135 states have internal predecessors, (146), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:26:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2021-11-21 01:26:12,846 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 37 [2021-11-21 01:26:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:12,846 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2021-11-21 01:26:12,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:12,847 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2021-11-21 01:26:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:26:12,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:12,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:12,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:13,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:13,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:26:13,267 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:26:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1387006624, now seen corresponding path program 1 times [2021-11-21 01:26:13,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:13,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858831817] [2021-11-21 01:26:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:13,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:13,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:13,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:13,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:26:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:13,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:13,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:13,434 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 [2021-11-21 01:26:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:26:13,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:26:13,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:13,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858831817] [2021-11-21 01:26:13,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858831817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:13,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:13,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-21 01:26:13,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001545852] [2021-11-21 01:26:13,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:13,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:13,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:13,792 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:26:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:14,777 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2021-11-21 01:26:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-21 01:26:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:14,779 INFO L225 Difference]: With dead ends: 160 [2021-11-21 01:26:14,779 INFO L226 Difference]: Without dead ends: 160 [2021-11-21 01:26:14,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:14,780 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 97 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:14,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 301 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:26:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-21 01:26:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2021-11-21 01:26:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 89 states have (on average 1.6179775280898876) internal successors, (144), 133 states have internal predecessors, (144), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:26:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-11-21 01:26:14,789 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 39 [2021-11-21 01:26:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:14,789 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-11-21 01:26:14,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:26:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-11-21 01:26:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:26:14,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:14,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:14,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:15,006 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:26:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1387006625, now seen corresponding path program 1 times [2021-11-21 01:26:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:15,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852957304] [2021-11-21 01:26:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:15,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:15,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:15,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:15,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:26:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:26:15,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:15,232 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 [2021-11-21 01:26:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:26:15,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:26:16,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:16,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852957304] [2021-11-21 01:26:16,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852957304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:16,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:16,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:26:16,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869357590] [2021-11-21 01:26:16,185 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:16,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:26:16,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:16,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:26:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:26:16,187 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:26:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:18,209 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2021-11-21 01:26:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-11-21 01:26:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:18,212 INFO L225 Difference]: With dead ends: 140 [2021-11-21 01:26:18,213 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:26:18,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:26:18,214 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 196 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:18,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 440 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:26:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:26:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-21 01:26:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 89 states have (on average 1.595505617977528) internal successors, (142), 131 states have internal predecessors, (142), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:26:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-11-21 01:26:18,221 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 39 [2021-11-21 01:26:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:18,222 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-11-21 01:26:18,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:26:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-11-21 01:26:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:26:18,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:18,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:18,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:18,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:18,445 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:26:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1387006880, now seen corresponding path program 1 times [2021-11-21 01:26:18,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:18,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097665756] [2021-11-21 01:26:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:18,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:18,447 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:18,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:26:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:26:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:26:18,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:26:18,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097665756] [2021-11-21 01:26:18,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097665756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:18,742 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:18,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:26:18,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91739861] [2021-11-21 01:26:18,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:18,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:18,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:18,743 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:26:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:19,054 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2021-11-21 01:26:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-21 01:26:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:19,056 INFO L225 Difference]: With dead ends: 156 [2021-11-21 01:26:19,056 INFO L226 Difference]: Without dead ends: 156 [2021-11-21 01:26:19,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:19,057 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 91 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:19,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 108 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:26:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-21 01:26:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-11-21 01:26:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 89 states have (on average 1.5730337078651686) internal successors, (140), 129 states have internal predecessors, (140), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:26:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2021-11-21 01:26:19,065 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 39 [2021-11-21 01:26:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2021-11-21 01:26:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:26:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2021-11-21 01:26:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:26:19,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:19,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:19,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:19,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:19,275 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:26:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1387006881, now seen corresponding path program 1 times [2021-11-21 01:26:19,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:19,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485888544] [2021-11-21 01:26:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:19,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:19,276 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:26:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:26:19,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:19,723 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 8 treesize of output 6 [2021-11-21 01:26:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:26:19,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485888544] [2021-11-21 01:26:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485888544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:19,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:19,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-21 01:26:19,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335170956] [2021-11-21 01:26:19,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:19,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:26:19,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:26:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:19,974 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-21 01:26:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:20,415 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-11-21 01:26:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-11-21 01:26:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:20,419 INFO L225 Difference]: With dead ends: 134 [2021-11-21 01:26:20,419 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 01:26:20,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:26:20,420 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 283 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:20,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:26:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 01:26:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-21 01:26:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 89 states have (on average 1.5280898876404494) internal successors, (136), 125 states have internal predecessors, (136), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:26:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-11-21 01:26:20,426 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 39 [2021-11-21 01:26:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:20,426 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-11-21 01:26:20,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-21 01:26:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-11-21 01:26:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:26:20,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:20,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:20,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:20,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:20,629 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-21 01:26:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1473750501, now seen corresponding path program 1 times [2021-11-21 01:26:20,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:20,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079600364] [2021-11-21 01:26:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:20,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:20,632 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:20,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:26:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:26:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:20,947 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 [2021-11-21 01:26:21,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 01:26:24,378 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-21 01:26:24,378 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 2 case distinctions, treesize of input 61 treesize of output 49 [2021-11-21 01:26:24,474 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-21 01:26:24,475 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 46 treesize of output 57 [2021-11-21 01:26:25,188 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:26:25,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 43 [2021-11-21 01:26:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:26:25,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:15,444 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|))))) (_ bv1 1))) (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_156| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_166| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_166| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_166| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166|) |v_node_create_~temp~0#1.offset_156| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_156|) v_DerPreprocessor_1)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|)))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_166|)))))))))) is different from false [2021-11-21 01:27:17,656 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_156| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_166| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_166| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_166| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166|) |v_node_create_~temp~0#1.offset_156| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_156|) v_DerPreprocessor_1)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|)))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_166|)))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|))))) (_ bv1 1))))) is different from false [2021-11-21 01:27:20,231 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_167| (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_156| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_166| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_166| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_166| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166|) |v_node_create_~temp~0#1.offset_156| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_156|) v_DerPreprocessor_1)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|)))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_166|)))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_167|)))) (not (bvult |v_node_create_~temp~0#1.base_167| |c_#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_node_create_~temp~0#1.base_167| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_167| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_167|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) v_DerPreprocessor_2)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|))))))))) (_ bv1 1))))) is different from true [2021-11-21 01:27:20,248 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 138 treesize of output 130 [2021-11-21 01:27:24,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:27:24,859 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 85 treesize of output 103 [2021-11-21 01:27:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-21 01:27:26,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079600364] [2021-11-21 01:27:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079600364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442969945] [2021-11-21 01:27:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:26,273 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:27:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:27:26,274 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:27:26,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-21 01:27:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:27:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:26,878 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 [2021-11-21 01:27:28,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 01:27:28,747 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-21 01:27:28,747 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 2 case distinctions, treesize of input 63 treesize of output 51 [2021-11-21 01:27:28,820 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-21 01:27:28,821 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 48 treesize of output 59 [2021-11-21 01:27:29,647 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:27:29,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 38 [2021-11-21 01:27:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:27:30,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:23,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (or (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_156| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_166| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_166| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_166| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166|) |v_node_create_~temp~0#1.offset_156| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_156|) v_DerPreprocessor_1)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|)))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_166|)))))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_4)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|)))))))))) is different from false [2021-11-21 01:28:25,787 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) v_DerPreprocessor_4)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|))))))) (_ bv1 1))) (exists ((v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.offset_156| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_166| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_166| |c_#StackHeapBarrier|) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_166| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_166|) |v_node_create_~temp~0#1.offset_156| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_156|) v_DerPreprocessor_1)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_8|)))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_166|)))))))))) is different from false [2021-11-21 01:29:31,187 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 142 treesize of output 134 [2021-11-21 01:29:33,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:29:33,074 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 84 treesize of output 102 [2021-11-21 01:29:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-21 01:29:33,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442969945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:29:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863755456] [2021-11-21 01:29:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:33,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:33,807 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:33,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf687171-d6c8-4f33-bf30-f383b23783a5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:29:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 01:29:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:44,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:29:46,316 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 54 treesize of output 42 [2021-11-21 01:29:48,933 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:29:48,933 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 1 case distinctions, treesize of input 54 treesize of output 50 [2021-11-21 01:29:48,994 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:29:48,994 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 50 treesize of output 57 [2021-11-21 01:29:53,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:29:53,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 57 treesize of output 57 [2021-11-21 01:29:59,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:29:59,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 35 [2021-11-21 01:30:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:30:04,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:09,688 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 123 treesize of output 119 [2021-11-21 01:30:52,962 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|))) (or (and (= .cse0 (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|) (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| .cse0)))) (_ bv1 1))) (exists ((|v_node_create_~temp~0#1.base_188| (_ BitVec 32))) (and (or (not (= |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ bv0 32))) (not (= |v_node_create_~temp~0#1.base_188| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_188|)))))))) (exists ((v_DerPreprocessor_5 (_ BitVec 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_188| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_5)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1)))))))))) is different from true [2021-11-21 01:30:58,483 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_8)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|))) (or (and (= (_ bv0 32) .cse0) (forall ((v_DerPreprocessor_7 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_7)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|) (_ bv0 32)))) (exists ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_188| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_188| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_5)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1)))) (or (not (= |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ bv0 32))) (not (= |v_node_create_~temp~0#1.base_188| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_188|)))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse0)))))) (_ bv1 1)))))) is different from false [2021-11-21 01:31:00,493 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_8)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|))) (or (and (= (_ bv0 32) .cse0) (forall ((v_DerPreprocessor_7 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_node_create_~temp~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_node_create_~temp~0#1.base|) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_7)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|) (_ bv0 32)))) (exists ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_188| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_188| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_5)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1)))) (or (not (= |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ bv0 32))) (not (= |v_node_create_~temp~0#1.base_188| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_188|)))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| .cse0)))))) (_ bv1 1)))))) is different from true [2021-11-21 01:31:00,685 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 178 treesize of output 174 [2021-11-21 01:31:05,069 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_8)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1))) (exists ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_188| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_188| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_5)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1)))) (or (not (= |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ bv0 32))) (not (= |v_node_create_~temp~0#1.base_188| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_188|)))))))))) (and (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| |c_node_create_~temp~0#1.base|) (= |c_node_create_~temp~0#1.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))) is different from false [2021-11-21 01:31:07,077 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |c_node_create_~temp~0#1.offset|) v_DerPreprocessor_8)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1))) (exists ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_188| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_node_create_~temp~0#1.base_188| (_ bv1 1)) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188| (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_188|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_DerPreprocessor_5)) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|) |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))))))) (_ bv1 1)))) (or (not (= |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12| (_ bv0 32))) (not (= |v_node_create_~temp~0#1.base_188| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_188|)))))))))) (and (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_14| |c_node_create_~temp~0#1.base|) (= |c_node_create_~temp~0#1.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.offset_BEFORE_CALL_12|)))) is different from true