./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ffc296399091e9c280291eebdfd40e063dea077 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ffc296399091e9c280291eebdfd40e063dea077 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:00:55,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:00:55,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:00:55,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:00:55,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:00:55,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:00:55,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:00:55,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:00:55,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:00:55,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:00:55,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:00:55,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:00:55,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:00:55,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:00:55,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:00:55,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:00:55,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:00:55,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:00:55,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:00:55,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:00:55,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:00:55,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:00:55,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:00:55,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:00:55,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:00:55,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:00:55,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:00:55,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:00:55,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:00:55,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:00:55,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:00:55,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:00:55,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:00:55,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:00:55,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:00:55,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:00:55,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:00:55,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:00:55,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:00:55,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:00:55,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:00:55,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:00:55,519 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:00:55,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:00:55,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:00:55,520 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:00:55,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:00:55,520 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:00:55,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:00:55,521 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:00:55,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:00:55,521 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:00:55,521 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:00:55,521 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:00:55,522 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:00:55,522 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:00:55,522 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:00:55,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:00:55,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:00:55,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:00:55,523 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:00:55,524 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:00:55,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:00:55,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:00:55,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:00:55,524 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:00:55,524 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:00:55,525 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:00:55,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:00:55,525 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:00:55,525 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:00:55,525 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:00:55,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:00:55,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:00:55,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:00:55,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:00:55,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:00:55,527 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:00:55,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:00:55,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:00:55,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:00:55,527 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_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ffc296399091e9c280291eebdfd40e063dea077 [2021-10-13 07:00:55,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:00:55,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:00:55,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:00:55,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:00:55,799 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:00:55,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-10-13 07:00:55,864 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/76baf045e/3b155928f3bc4f3fb4315c3a21aa319e/FLAG4dab0e5e9 [2021-10-13 07:00:56,378 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:00:56,378 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-10-13 07:00:56,403 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/76baf045e/3b155928f3bc4f3fb4315c3a21aa319e/FLAG4dab0e5e9 [2021-10-13 07:00:56,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/76baf045e/3b155928f3bc4f3fb4315c3a21aa319e [2021-10-13 07:00:56,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:00:56,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:00:56,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:00:56,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:00:56,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:00:56,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:00:56" (1/1) ... [2021-10-13 07:00:56,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181c1149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:56, skipping insertion in model container [2021-10-13 07:00:56,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:00:56" (1/1) ... [2021-10-13 07:00:56,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:00:56,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:00:57,078 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-10-13 07:00:57,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:00:57,097 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:00:57,162 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-10-13 07:00:57,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:00:57,194 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:00:57,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57 WrapperNode [2021-10-13 07:00:57,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:00:57,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:00:57,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:00:57,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:00:57,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:00:57,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:00:57,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:00:57,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:00:57,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:00:57,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:00:57,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:00:57,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:00:57,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (1/1) ... [2021-10-13 07:00:57,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:00:57,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:57,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:00:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:00:57,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:00:57,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:00:57,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:00:57,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:00:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:00:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:00:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:00:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:00:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:00:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:00:57,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:00:58,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:00:58,071 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 07:00:58,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:58 BoogieIcfgContainer [2021-10-13 07:00:58,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:00:58,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:00:58,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:00:58,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:00:58,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:00:56" (1/3) ... [2021-10-13 07:00:58,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412f06a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:00:58, skipping insertion in model container [2021-10-13 07:00:58,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:57" (2/3) ... [2021-10-13 07:00:58,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412f06a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:00:58, skipping insertion in model container [2021-10-13 07:00:58,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:58" (3/3) ... [2021-10-13 07:00:58,084 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2021-10-13 07:00:58,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:00:58,090 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2021-10-13 07:00:58,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:00:58,141 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:00:58,142 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-13 07:00:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 38 states have (on average 2.473684210526316) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:00:58,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:58,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:00:58,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:00:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 6688050, now seen corresponding path program 1 times [2021-10-13 07:00:58,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:58,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134229181] [2021-10-13 07:00:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:58,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:58,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:58,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134229181] [2021-10-13 07:00:58,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134229181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:58,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:58,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:00:58,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546596314] [2021-10-13 07:00:58,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:00:58,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:00:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:00:58,445 INFO L87 Difference]: Start difference. First operand has 82 states, 38 states have (on average 2.473684210526316) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:58,490 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-10-13 07:00:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:00:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:00:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:58,501 INFO L225 Difference]: With dead ends: 94 [2021-10-13 07:00:58,501 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 07:00:58,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:00:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 07:00:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2021-10-13 07:00:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-10-13 07:00:58,537 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 4 [2021-10-13 07:00:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:58,538 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-10-13 07:00:58,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-10-13 07:00:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:00:58,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:58,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:00:58,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:00:58,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:00:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash 6504563, now seen corresponding path program 1 times [2021-10-13 07:00:58,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:58,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531376971] [2021-10-13 07:00:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:58,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:58,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:58,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531376971] [2021-10-13 07:00:58,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531376971] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:58,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:58,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:00:58,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091091610] [2021-10-13 07:00:58,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:00:58,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:00:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:00:58,581 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:58,696 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-10-13 07:00:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:00:58,696 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:00:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:58,698 INFO L225 Difference]: With dead ends: 86 [2021-10-13 07:00:58,698 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 07:00:58,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:00:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 07:00:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-10-13 07:00:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-10-13 07:00:58,711 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 4 [2021-10-13 07:00:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:58,711 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-10-13 07:00:58,712 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-10-13 07:00:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:00:58,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:58,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:00:58,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:00:58,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:00:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash 6504564, now seen corresponding path program 1 times [2021-10-13 07:00:58,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:58,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960030694] [2021-10-13 07:00:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:58,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:58,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:58,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960030694] [2021-10-13 07:00:58,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960030694] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:58,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:58,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:00:58,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904384278] [2021-10-13 07:00:58,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:00:58,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:00:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:00:58,788 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:58,883 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-10-13 07:00:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:00:58,883 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:00:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:58,884 INFO L225 Difference]: With dead ends: 72 [2021-10-13 07:00:58,884 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 07:00:58,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:00:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 07:00:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 07:00:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-10-13 07:00:58,900 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 4 [2021-10-13 07:00:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:58,900 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-10-13 07:00:58,900 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-10-13 07:00:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:00:58,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:58,901 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:00:58,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:00:58,902 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:00:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1955922797, now seen corresponding path program 1 times [2021-10-13 07:00:58,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:58,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519172033] [2021-10-13 07:00:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:58,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:58,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:58,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519172033] [2021-10-13 07:00:58,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519172033] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:58,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:58,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:00:58,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645217708] [2021-10-13 07:00:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:00:58,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:00:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:00:58,997 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:59,108 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-10-13 07:00:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:00:59,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:00:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:59,112 INFO L225 Difference]: With dead ends: 84 [2021-10-13 07:00:59,113 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 07:00:59,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 07:00:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-10-13 07:00:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 37 states have (on average 2.108108108108108) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-13 07:00:59,136 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 6 [2021-10-13 07:00:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:59,136 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-13 07:00:59,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-13 07:00:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:00:59,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:59,137 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:00:59,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:00:59,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:00:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1955922798, now seen corresponding path program 1 times [2021-10-13 07:00:59,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:59,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944183315] [2021-10-13 07:00:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:59,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:59,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:59,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944183315] [2021-10-13 07:00:59,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944183315] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:59,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:59,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:00:59,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186753084] [2021-10-13 07:00:59,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:00:59,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:00:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:00:59,240 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:59,330 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-13 07:00:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:00:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:00:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:59,334 INFO L225 Difference]: With dead ends: 73 [2021-10-13 07:00:59,334 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 07:00:59,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 07:00:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-10-13 07:00:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 2.081081081081081) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-10-13 07:00:59,347 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 6 [2021-10-13 07:00:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:59,347 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-10-13 07:00:59,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-10-13 07:00:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:00:59,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:59,349 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:59,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:00:59,350 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:00:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 384333176, now seen corresponding path program 1 times [2021-10-13 07:00:59,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:59,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654019215] [2021-10-13 07:00:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:59,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:59,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:59,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654019215] [2021-10-13 07:00:59,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654019215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:00:59,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383425209] [2021-10-13 07:00:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:59,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:59,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:59,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:00:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:00:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:59,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383425209] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:59,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086544559] [2021-10-13 07:00:59,660 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-13 07:00:59,660 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:00:59,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:00:59,670 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:00:59,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:00:59,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,722 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:00:59,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:00:59,727 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:00:59,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:00:59,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-13 07:00:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:00:59,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:00:59,824 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:00:59,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:00:59,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:00:59,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:00:59,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:00:59,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:00:59,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:59,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:00:59,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:00:59,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:134, output treesize:122 [2021-10-13 07:00:59,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:00,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 07:01:00,088 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_86| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:01:00,090 INFO L168 Benchmark]: Toolchain (without parser) took 3398.50 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 70.5 MB in the beginning and 48.2 MB in the end (delta: 22.3 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:00,091 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 67.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:01:00,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 500.13 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 60.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:00,092 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.39 ms. Allocated memory is still 92.3 MB. Free memory was 60.3 MB in the beginning and 58.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:00,093 INFO L168 Benchmark]: Boogie Preprocessor took 36.06 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 56.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:00,093 INFO L168 Benchmark]: RCFGBuilder took 792.75 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 56.3 MB in the beginning and 92.5 MB in the end (delta: -36.2 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:00,094 INFO L168 Benchmark]: TraceAbstraction took 2013.52 ms. Allocated memory is still 121.6 MB. Free memory was 92.5 MB in the beginning and 48.2 MB in the end (delta: 44.3 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:00,096 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 67.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 500.13 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 60.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.39 ms. Allocated memory is still 92.3 MB. Free memory was 60.3 MB in the beginning and 58.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.06 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 56.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 792.75 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 56.3 MB in the beginning and 92.5 MB in the end (delta: -36.2 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2013.52 ms. Allocated memory is still 121.6 MB. Free memory was 92.5 MB in the beginning and 48.2 MB in the end (delta: 44.3 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_86| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_86|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:01:00,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:01:02,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:01:02,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:01:02,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:01:02,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:01:02,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:01:02,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:01:02,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:01:02,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:01:02,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:01:02,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:01:02,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:01:02,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:01:02,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:01:02,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:01:02,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:01:02,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:01:02,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:01:02,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:01:02,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:01:02,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:01:02,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:01:02,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:01:02,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:01:02,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:01:02,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:01:02,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:01:02,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:01:02,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:01:02,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:01:02,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:01:02,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:01:02,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:01:02,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:01:02,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:01:02,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:01:02,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:01:02,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:01:02,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:01:02,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:01:02,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:01:02,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:01:02,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:01:02,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:01:02,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:01:02,733 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:01:02,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:01:02,734 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:01:02,734 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:01:02,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:01:02,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:01:02,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:01:02,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:01:02,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:01:02,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:01:02,738 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:01:02,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:01:02,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:01:02,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:01:02,739 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:01:02,739 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:01:02,739 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:01:02,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:01:02,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:01:02,740 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:01:02,740 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:01:02,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:01:02,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:01:02,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:01:02,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:01:02,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:01:02,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:02,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:01:02,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:01:02,743 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:01:02,743 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:01:02,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:01:02,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:01:02,744 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_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ffc296399091e9c280291eebdfd40e063dea077 [2021-10-13 07:01:03,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:01:03,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:01:03,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:01:03,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:01:03,165 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:01:03,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-10-13 07:01:03,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/4a5e6a2a4/fd903981eb7440a089afd24f47eed76a/FLAG470898be4 [2021-10-13 07:01:03,896 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:01:03,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-10-13 07:01:03,923 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/4a5e6a2a4/fd903981eb7440a089afd24f47eed76a/FLAG470898be4 [2021-10-13 07:01:04,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/data/4a5e6a2a4/fd903981eb7440a089afd24f47eed76a [2021-10-13 07:01:04,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:01:04,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:01:04,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:04,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:01:04,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:01:04,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54285e5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04, skipping insertion in model container [2021-10-13 07:01:04,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:01:04,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:01:04,567 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-10-13 07:01:04,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:04,582 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:01:04,627 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2021-10-13 07:01:04,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:04,679 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:01:04,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04 WrapperNode [2021-10-13 07:01:04,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:04,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:04,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:01:04,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:01:04,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:04,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:01:04,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:01:04,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:01:04,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:01:04,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:01:04,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:01:04,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:01:04,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (1/1) ... [2021-10-13 07:01:04,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:04,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:01:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:01:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:01:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:01:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:01:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:01:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:01:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:01:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:01:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:01:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:01:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:01:04,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:01:05,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:01:05,623 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 07:01:05,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:05 BoogieIcfgContainer [2021-10-13 07:01:05,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:01:05,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:01:05,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:01:05,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:01:05,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:01:04" (1/3) ... [2021-10-13 07:01:05,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7d8b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:05, skipping insertion in model container [2021-10-13 07:01:05,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:04" (2/3) ... [2021-10-13 07:01:05,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7d8b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:05, skipping insertion in model container [2021-10-13 07:01:05,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:05" (3/3) ... [2021-10-13 07:01:05,641 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2021-10-13 07:01:05,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:01:05,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2021-10-13 07:01:05,690 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:01:05,696 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:01:05,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-13 07:01:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:01:05,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:05,743 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:01:05,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash 28698858, now seen corresponding path program 1 times [2021-10-13 07:01:05,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:05,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049022291] [2021-10-13 07:01:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:05,765 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:05,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:05,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:05,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:01:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:01:05,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:05,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:05,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:06,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:06,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049022291] [2021-10-13 07:01:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049022291] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:06,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:06,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:01:06,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137437316] [2021-10-13 07:01:06,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:06,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:06,073 INFO L87 Difference]: Start difference. First operand has 99 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:06,336 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-10-13 07:01:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:06,337 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:01:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:06,346 INFO L225 Difference]: With dead ends: 110 [2021-10-13 07:01:06,346 INFO L226 Difference]: Without dead ends: 106 [2021-10-13 07:01:06,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-13 07:01:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2021-10-13 07:01:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-13 07:01:06,396 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 5 [2021-10-13 07:01:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:06,396 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-13 07:01:06,396 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-13 07:01:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:01:06,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:06,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:01:06,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:06,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:06,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash 28698859, now seen corresponding path program 1 times [2021-10-13 07:01:06,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:06,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682789858] [2021-10-13 07:01:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:06,617 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:06,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:06,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:06,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:01:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:06,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:01:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:06,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:06,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:06,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:06,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682789858] [2021-10-13 07:01:06,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682789858] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:06,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:06,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:01:06,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960882074] [2021-10-13 07:01:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:06,890 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:07,113 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-10-13 07:01:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:07,115 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:01:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:07,116 INFO L225 Difference]: With dead ends: 90 [2021-10-13 07:01:07,117 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 07:01:07,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 07:01:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-10-13 07:01:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.8076923076923077) internal successors, (94), 86 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-10-13 07:01:07,126 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 5 [2021-10-13 07:01:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-10-13 07:01:07,127 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-10-13 07:01:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:01:07,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:07,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:07,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:07,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:07,339 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -245418610, now seen corresponding path program 1 times [2021-10-13 07:01:07,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:07,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858227578] [2021-10-13 07:01:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:07,341 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:07,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:01:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:07,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:01:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:07,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:07,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:07,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:07,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858227578] [2021-10-13 07:01:07,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858227578] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:07,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:07,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:01:07,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756041263] [2021-10-13 07:01:07,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:01:07,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:01:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:01:07,581 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:08,189 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2021-10-13 07:01:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:01:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:01:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:08,193 INFO L225 Difference]: With dead ends: 176 [2021-10-13 07:01:08,193 INFO L226 Difference]: Without dead ends: 176 [2021-10-13 07:01:08,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:01:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-13 07:01:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 86. [2021-10-13 07:01:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-10-13 07:01:08,204 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 9 [2021-10-13 07:01:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:08,204 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-10-13 07:01:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-10-13 07:01:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:01:08,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:08,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:08,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:08,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:08,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash -245418609, now seen corresponding path program 1 times [2021-10-13 07:01:08,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:08,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217251980] [2021-10-13 07:01:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:08,418 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:08,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:08,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:08,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:01:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:08,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:01:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:08,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:08,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:08,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:08,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217251980] [2021-10-13 07:01:08,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217251980] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:08,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:08,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:01:08,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834754007] [2021-10-13 07:01:08,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:01:08,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:01:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:01:08,865 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:09,645 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-10-13 07:01:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:01:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:01:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:09,647 INFO L225 Difference]: With dead ends: 165 [2021-10-13 07:01:09,647 INFO L226 Difference]: Without dead ends: 165 [2021-10-13 07:01:09,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:01:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-13 07:01:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 85. [2021-10-13 07:01:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-10-13 07:01:09,656 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 9 [2021-10-13 07:01:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-10-13 07:01:09,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-10-13 07:01:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:01:09,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:09,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:09,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:09,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:09,858 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1442029390, now seen corresponding path program 1 times [2021-10-13 07:01:09,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:09,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171473048] [2021-10-13 07:01:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:09,859 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:09,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:09,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:09,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:01:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:09,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:01:09,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:09,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:10,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:10,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171473048] [2021-10-13 07:01:10,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171473048] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:10,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:10,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:01:10,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494248267] [2021-10-13 07:01:10,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:10,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:10,027 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:10,040 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-10-13 07:01:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:01:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:10,042 INFO L225 Difference]: With dead ends: 95 [2021-10-13 07:01:10,042 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 07:01:10,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 07:01:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-13 07:01:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-13 07:01:10,053 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 11 [2021-10-13 07:01:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:10,053 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-13 07:01:10,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-13 07:01:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:01:10,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:10,055 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:10,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:10,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:10,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1941472818, now seen corresponding path program 1 times [2021-10-13 07:01:10,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:10,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113997004] [2021-10-13 07:01:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:10,266 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:10,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:10,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:01:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:01:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:10,584 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:01:10,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 07:01:11,027 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:01:11,027 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 45 treesize of output 56 [2021-10-13 07:01:11,906 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:01:11,906 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 48 treesize of output 59 [2021-10-13 07:01:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:12,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:14,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:14,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113997004] [2021-10-13 07:01:14,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113997004] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:14,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:14,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 07:01:14,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796677802] [2021-10-13 07:01:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:01:14,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:01:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=58, Unknown=1, NotChecked=0, Total=90 [2021-10-13 07:01:14,870 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:15,293 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2021-10-13 07:01:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 07:01:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:15,294 INFO L225 Difference]: With dead ends: 102 [2021-10-13 07:01:15,294 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 07:01:15,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2248.4ms TimeCoverageRelationStatistics Valid=37, Invalid=72, Unknown=1, NotChecked=0, Total=110 [2021-10-13 07:01:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 07:01:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-10-13 07:01:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.564516129032258) internal successors, (97), 89 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-10-13 07:01:15,300 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 29 [2021-10-13 07:01:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:15,300 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-10-13 07:01:15,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-10-13 07:01:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:01:15,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:15,302 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:15,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:15,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:15,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1941472817, now seen corresponding path program 1 times [2021-10-13 07:01:15,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:15,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667429057] [2021-10-13 07:01:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:15,527 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:15,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:15,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:15,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:01:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:01:15,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:15,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:15,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:15,903 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:01:15,904 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 29 treesize of output 31 [2021-10-13 07:01:15,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:01:15,913 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 28 treesize of output 24 [2021-10-13 07:01:16,152 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 07:01:16,153 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 [2021-10-13 07:01:16,704 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 07:01:16,704 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 [2021-10-13 07:01:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:17,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:20,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:20,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667429057] [2021-10-13 07:01:20,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667429057] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:20,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:20,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 07:01:20,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755317462] [2021-10-13 07:01:20,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:01:20,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:01:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2021-10-13 07:01:20,470 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:21,273 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-10-13 07:01:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:01:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 07:01:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:21,275 INFO L225 Difference]: With dead ends: 85 [2021-10-13 07:01:21,275 INFO L226 Difference]: Without dead ends: 85 [2021-10-13 07:01:21,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2588.7ms TimeCoverageRelationStatistics Valid=36, Invalid=73, Unknown=1, NotChecked=0, Total=110 [2021-10-13 07:01:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-13 07:01:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-13 07:01:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-10-13 07:01:21,282 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 29 [2021-10-13 07:01:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:21,282 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-10-13 07:01:21,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-10-13 07:01:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:01:21,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:21,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:21,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:21,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:21,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash -984983596, now seen corresponding path program 1 times [2021-10-13 07:01:21,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:21,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625877060] [2021-10-13 07:01:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:21,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:21,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:21,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:21,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:01:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:01:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:21,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:22,148 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-13 07:01:22,149 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 26 treesize of output 37 [2021-10-13 07:01:22,298 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:01:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 45 [2021-10-13 07:01:22,511 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:01:22,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 74 treesize of output 65 [2021-10-13 07:01:23,599 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:01:23,600 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 39 [2021-10-13 07:01:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:23,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:23,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:23,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-10-13 07:01:33,900 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 148 treesize of output 140 [2021-10-13 07:01:36,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:36,194 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 92 treesize of output 110 [2021-10-13 07:01:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:36,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:36,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625877060] [2021-10-13 07:01:36,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625877060] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:36,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:36,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2021-10-13 07:01:36,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030586854] [2021-10-13 07:01:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:01:36,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:01:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=477, Unknown=2, NotChecked=0, Total=552 [2021-10-13 07:01:36,519 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:53,401 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2021-10-13 07:01:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:01:53,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:01:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:53,403 INFO L225 Difference]: With dead ends: 144 [2021-10-13 07:01:53,403 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 07:01:53,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 16354.3ms TimeCoverageRelationStatistics Valid=281, Invalid=907, Unknown=2, NotChecked=0, Total=1190 [2021-10-13 07:01:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 07:01:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2021-10-13 07:01:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-10-13 07:01:53,408 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 33 [2021-10-13 07:01:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:53,409 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-10-13 07:01:53,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-10-13 07:01:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:01:53,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:53,411 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:53,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 07:01:53,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:53,627 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:01:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash -984983595, now seen corresponding path program 1 times [2021-10-13 07:01:53,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:53,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483262312] [2021-10-13 07:01:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:53,628 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:53,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:53,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:53,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:01:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 07:01:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:54,564 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:01:54,565 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 22 treesize of output 22 [2021-10-13 07:01:54,577 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 16 treesize of output 18 [2021-10-13 07:01:54,744 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:01:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2021-10-13 07:01:54,850 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:01:54,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:01:55,067 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:01:55,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 84 [2021-10-13 07:01:55,137 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:01:55,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 69 [2021-10-13 07:01:57,272 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:01:57,272 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 68 treesize of output 50 [2021-10-13 07:01:57,280 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:01:57,281 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 44 treesize of output 30 [2021-10-13 07:01:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:57,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:57,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:57,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-13 07:01:57,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:57,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-13 07:02:12,384 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 241 treesize of output 233 [2021-10-13 07:02:12,400 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 1188 treesize of output 1136 [2021-10-13 07:02:17,878 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 18 treesize of output 16 [2021-10-13 07:02:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:02:18,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:02:18,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483262312] [2021-10-13 07:02:18,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483262312] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:02:18,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:02:18,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2021-10-13 07:02:18,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822662758] [2021-10-13 07:02:18,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:02:18,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:02:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:02:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=475, Unknown=3, NotChecked=0, Total=552 [2021-10-13 07:02:18,017 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:02:31,007 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-10-13 07:02:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:02:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:02:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:02:31,009 INFO L225 Difference]: With dead ends: 155 [2021-10-13 07:02:31,009 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 07:02:31,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 24961.9ms TimeCoverageRelationStatistics Valid=290, Invalid=967, Unknown=3, NotChecked=0, Total=1260 [2021-10-13 07:02:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 07:02:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 89. [2021-10-13 07:02:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 88 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-10-13 07:02:31,014 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 33 [2021-10-13 07:02:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:02:31,014 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-10-13 07:02:31,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-10-13 07:02:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:02:31,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:02:31,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:02:31,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:02:31,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:02:31,227 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:02:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:02:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash -474463151, now seen corresponding path program 1 times [2021-10-13 07:02:31,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:02:31,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906559730] [2021-10-13 07:02:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:02:31,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:02:31,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:02:31,230 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:02:31,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:02:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:02:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:02:31,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:02:31,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:02:31,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 07:02:31,845 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 23 treesize of output 15 [2021-10-13 07:02:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 07:02:31,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:02:31,937 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 48 treesize of output 44 [2021-10-13 07:02:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 07:02:32,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:02:32,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906559730] [2021-10-13 07:02:32,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906559730] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:02:32,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:02:32,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-13 07:02:32,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110271582] [2021-10-13 07:02:32,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 07:02:32,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:02:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 07:02:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:02:32,312 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:02:33,215 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-10-13 07:02:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:02:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 07:02:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:02:33,217 INFO L225 Difference]: With dead ends: 137 [2021-10-13 07:02:33,217 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 07:02:33,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:02:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 07:02:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 90. [2021-10-13 07:02:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 89 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-10-13 07:02:33,223 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 34 [2021-10-13 07:02:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:02:33,223 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-10-13 07:02:33,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-10-13 07:02:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:02:33,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:02:33,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:02:33,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:02:33,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:02:33,425 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:02:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:02:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash -474463150, now seen corresponding path program 1 times [2021-10-13 07:02:33,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:02:33,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154759110] [2021-10-13 07:02:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:02:33,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:02:33,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:02:33,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:02:33,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:02:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:02:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:02:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:02:33,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:02:34,126 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 17 treesize of output 13 [2021-10-13 07:02:34,133 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 [2021-10-13 07:02:34,165 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 31 treesize of output 23 [2021-10-13 07:02:34,168 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 20 treesize of output 12 [2021-10-13 07:02:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 07:02:34,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:02:34,458 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 40 treesize of output 32 [2021-10-13 07:02:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:34,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 07:02:35,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:02:35,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154759110] [2021-10-13 07:02:35,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154759110] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:02:35,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:02:35,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-13 07:02:35,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147738317] [2021-10-13 07:02:35,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:02:35,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:02:35,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:02:35,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:02:35,033 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:02:36,814 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2021-10-13 07:02:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:02:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 07:02:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:02:36,816 INFO L225 Difference]: With dead ends: 146 [2021-10-13 07:02:36,816 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 07:02:36,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:02:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 07:02:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 96. [2021-10-13 07:02:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 95 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-10-13 07:02:36,820 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 34 [2021-10-13 07:02:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:02:36,820 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-10-13 07:02:36,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:02:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-10-13 07:02:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 07:02:36,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:02:36,822 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:02:36,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:02:37,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:02:37,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:02:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:02:37,027 INFO L82 PathProgramCache]: Analyzing trace with hash -435534134, now seen corresponding path program 1 times [2021-10-13 07:02:37,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:02:37,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749787319] [2021-10-13 07:02:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:02:37,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:02:37,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:02:37,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:02:37,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:02:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:02:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 07:02:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:02:37,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:02:37,765 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:02:37,765 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 18 treesize of output 23 [2021-10-13 07:02:38,000 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 27 treesize of output 23 [2021-10-13 07:02:38,336 INFO L354 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2021-10-13 07:02:38,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 83 [2021-10-13 07:02:38,552 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:02:38,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:02:38,644 INFO L354 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2021-10-13 07:02:38,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 80 [2021-10-13 07:02:38,991 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-10-13 07:02:38,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 141 treesize of output 131 [2021-10-13 07:02:39,085 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:02:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 126 treesize of output 117 [2021-10-13 07:02:41,650 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:02:41,650 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 124 treesize of output 110 [2021-10-13 07:02:42,912 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-13 07:02:42,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 90 [2021-10-13 07:02:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:02:43,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:02:43,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:43,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:02:43,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:43,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-13 07:02:54,390 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 357 treesize of output 349 [2021-10-13 07:06:21,463 INFO L354 Elim1Store]: treesize reduction 537, result has 41.2 percent of original size [2021-10-13 07:06:21,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 53453 treesize of output 52076 [2021-10-13 07:06:22,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:06:22,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749787319] [2021-10-13 07:06:22,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:06:22,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430372248] [2021-10-13 07:06:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:06:22,143 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:06:22,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:06:22,158 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:06:22,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:06:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:06:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 07:06:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:06:23,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:06:23,784 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:06:23,784 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 [2021-10-13 07:06:24,415 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 29 treesize of output 25 [2021-10-13 07:06:25,477 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-10-13 07:06:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 86 [2021-10-13 07:06:25,920 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:06:25,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:06:26,065 INFO L354 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2021-10-13 07:06:26,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 86 [2021-10-13 07:06:26,874 INFO L354 Elim1Store]: treesize reduction 110, result has 17.9 percent of original size [2021-10-13 07:06:26,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 138 [2021-10-13 07:06:26,942 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:06:26,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 137 treesize of output 128 [2021-10-13 07:06:28,660 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:06:28,660 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 143 treesize of output 129 [2021-10-13 07:06:30,379 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:06:30,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 77 [2021-10-13 07:06:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:06:31,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:06:32,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:06:32,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 07:06:32,318 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:06:32,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 07:06:34,331 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_6)))) (select .cse0 (select (select .cse0 c_ULTIMATE.start_sll_append_~head.base) c_ULTIMATE.start_sll_append_~head.offset))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_7)) c_ULTIMATE.start_sll_append_~head.base) c_ULTIMATE.start_sll_append_~head.offset))))))) (_ bv1 1)))) is different from false [2021-10-13 07:06:36,355 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (ULTIMATE.start_node_create_~temp~0.offset (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv4 32) ULTIMATE.start_node_create_~temp~0.offset))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_6)))) (select .cse0 (select (select .cse0 c_ULTIMATE.start_sll_append_~head.base) c_ULTIMATE.start_sll_append_~head.offset))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_7)) c_ULTIMATE.start_sll_append_~head.base) c_ULTIMATE.start_sll_append_~head.offset) (_ bv4 32)))))))) (_ bv1 1)))) is different from false [2021-10-13 07:06:36,398 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 572 treesize of output 560 [2021-10-13 07:07:16,707 INFO L354 Elim1Store]: treesize reduction 537, result has 41.2 percent of original size [2021-10-13 07:07:16,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 102650 treesize of output 98369 [2021-10-13 07:07:17,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:07:17,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975178871] [2021-10-13 07:07:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:17,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:07:17,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:07:17,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:07:17,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:07:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 07:07:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:07:18,403 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:07:18,403 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 18 treesize of output 23 [2021-10-13 07:07:18,564 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 27 treesize of output 23 [2021-10-13 07:07:18,756 INFO L354 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2021-10-13 07:07:18,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 81 [2021-10-13 07:07:18,998 INFO L354 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2021-10-13 07:07:18,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 84 [2021-10-13 07:07:19,188 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:07:19,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:07:19,395 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-10-13 07:07:19,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 142 treesize of output 132 [2021-10-13 07:07:19,457 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:07:19,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 127 treesize of output 118 [2021-10-13 07:07:21,134 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:07:21,134 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 124 treesize of output 110 [2021-10-13 07:07:24,178 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-13 07:07:24,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 82 [2021-10-13 07:07:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:07:24,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:07:25,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:25,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-13 07:07:25,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:25,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-10-13 07:07:27,453 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 355 treesize of output 347 [2021-10-13 07:10:45,769 INFO L354 Elim1Store]: treesize reduction 537, result has 41.2 percent of original size [2021-10-13 07:10:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 37093 treesize of output 36228 [2021-10-13 07:10:46,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:10:46,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:10:46,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:10:46,229 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:10:46,229 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:10:46,234 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:10:46,236 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:10:46,236 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:10:46,236 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:10:46,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:10:46,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:10:46,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:10:46,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:10:46,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:10:46,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:10:46,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:10:46,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:10:46,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:10:46,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:10:46,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:10:46,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:10:46,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:10:46,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:10:46,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:10:46,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:10:46,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:10:46,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 07:10:46,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 07:10:46,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 07:10:46,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-13 07:10:46,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-13 07:10:46,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-13 07:10:46,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-13 07:10:46,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-13 07:10:46,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-13 07:10:46,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-13 07:10:46,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-13 07:10:46,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:10:46,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:10:46,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:10:46,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:10:46,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:10:46,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:46,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:46,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-13 07:10:46,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:10:46,861 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:10:46,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:10:46 BoogieIcfgContainer [2021-10-13 07:10:46,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:10:46,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:10:46,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:10:46,876 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:10:46,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:05" (3/4) ... [2021-10-13 07:10:46,880 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:10:46,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:10:46,881 INFO L168 Benchmark]: Toolchain (without parser) took 582682.41 ms. Allocated memory was 58.7 MB in the beginning and 180.4 MB in the end (delta: 121.6 MB). Free memory was 35.1 MB in the beginning and 54.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 102.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:46,881 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 58.7 MB. Free memory is still 39.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:10:46,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 480.95 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 34.9 MB in the beginning and 54.5 MB in the end (delta: -19.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:46,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.28 ms. Allocated memory is still 79.7 MB. Free memory was 54.3 MB in the beginning and 52.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:46,882 INFO L168 Benchmark]: Boogie Preprocessor took 38.31 ms. Allocated memory is still 79.7 MB. Free memory was 52.0 MB in the beginning and 50.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:46,882 INFO L168 Benchmark]: RCFGBuilder took 818.35 ms. Allocated memory is still 79.7 MB. Free memory was 50.0 MB in the beginning and 47.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:46,883 INFO L168 Benchmark]: TraceAbstraction took 581248.29 ms. Allocated memory was 79.7 MB in the beginning and 180.4 MB in the end (delta: 100.7 MB). Free memory was 47.5 MB in the beginning and 54.3 MB in the end (delta: -6.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:10:46,883 INFO L168 Benchmark]: Witness Printer took 4.20 ms. Allocated memory is still 180.4 MB. Free memory is still 54.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:10:46,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 58.7 MB. Free memory is still 39.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 480.95 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 34.9 MB in the beginning and 54.5 MB in the end (delta: -19.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.28 ms. Allocated memory is still 79.7 MB. Free memory was 54.3 MB in the beginning and 52.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.31 ms. Allocated memory is still 79.7 MB. Free memory was 52.0 MB in the beginning and 50.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 818.35 ms. Allocated memory is still 79.7 MB. Free memory was 50.0 MB in the beginning and 47.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 581248.29 ms. Allocated memory was 79.7 MB in the beginning and 180.4 MB in the end (delta: 100.7 MB). Free memory was 47.5 MB in the beginning and 54.3 MB in the end (delta: -6.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.20 ms. Allocated memory is still 180.4 MB. Free memory is still 54.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L612] const int len = 2; [L613] const int data = 1; [L614] SLL s = sll_create(len, data); [L584] SLL head = ((void *)0); [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND FALSE !(len > 0) [L590] return head; [L614] SLL s = sll_create(len, data); [L615] const int uneq = 5; [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L600] SLL new_last = node_create(data); [L601] EXPR \read(*head) [L601] COND FALSE !(((void *)0) == *head) [L604] EXPR \read(*head) [L604] SLL last = *head; [L605] last->next [L605] COND TRUE last->next [L606] EXPR last->next [L606] last = last->next [L605] last->next - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 604]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 604]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 638]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 99 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 581172.6ms, OverallIterations: 12, TraceHistogramMax: 2, EmptinessCheckTime: 44.1ms, AutomataDifference: 35748.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 701 SDtfs, 3252 SDslu, 1186 SDs, 0 SdLazy, 2072 SolverSat, 162 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 21043.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 485 GetRequests, 341 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 47974.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=0, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95.9ms AutomataMinimizationTime, 11 MinimizatonAttempts, 418 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 179.1ms SsaConstructionTime, 1028.2ms SatisfiabilityAnalysisTime, 50495.4ms InterpolantComputationTime, 231 NumberOfCodeBlocks, 231 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 440 ConstructedInterpolants, 150 QuantifiedInterpolants, 7391 SizeOfPredicates, 104 NumberOfNonLiveVariables, 1257 ConjunctsInSsa, 122 ConjunctsInUnsatCore, 22 InterpolantComputations, 18 PerfectInterpolantSequences, 91/132 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:10:46,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6f4ce3-a3d9-42d9-b936-5d5d795c3d7d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...