./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8 --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 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:29,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:29,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:29,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:29,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:29,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:29,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:29,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:29,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:29,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:29,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:29,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:29,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:29,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:29,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:29,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:29,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:29,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:29,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:29,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:29,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:29,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:29,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:29,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:29,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:29,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:29,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:29,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:29,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:29,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:29,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:29,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:29,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:29,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:29,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:29,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:29,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:29,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:29,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:29,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:29,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:29,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:58:29,573 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:29,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:29,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:29,576 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:29,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:29,576 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:29,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:58:29,577 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:29,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:29,578 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:58:29,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:58:29,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:29,580 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:58:29,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:58:29,580 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:58:29,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:58:29,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:58:29,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:29,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:29,584 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:58:29,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:58:29,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:29,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:29,585 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:58:29,586 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:58:29,586 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:58:29,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:29,590 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:29,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:29,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:29,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:29,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:29,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:29,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:29,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:29,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:58:29,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:58:29,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:29,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:29,594 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 [2021-11-07 01:58:29,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:29,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:29,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:29,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:29,953 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:29,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-07 01:58:30,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/c992ef933/8fdf29283e8e402e9ec373541a960272/FLAG37125bdbe [2021-11-07 01:58:30,875 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:30,876 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-07 01:58:30,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/c992ef933/8fdf29283e8e402e9ec373541a960272/FLAG37125bdbe [2021-11-07 01:58:30,974 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/c992ef933/8fdf29283e8e402e9ec373541a960272 [2021-11-07 01:58:30,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:30,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:30,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:30,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:30,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:30,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:30" (1/1) ... [2021-11-07 01:58:30,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c31ef03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:30, skipping insertion in model container [2021-11-07 01:58:30,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:30" (1/1) ... [2021-11-07 01:58:31,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:31,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:31,806 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-07 01:58:31,922 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-07 01:58:31,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:31,966 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:58:31,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@367337d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:31, skipping insertion in model container [2021-11-07 01:58:31,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:31,967 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:58:31,970 INFO L168 Benchmark]: Toolchain (without parser) took 988.12 ms. Allocated memory is still 107.0 MB. Free memory was 70.5 MB in the beginning and 72.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:31,971 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 107.0 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:58:31,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 984.16 ms. Allocated memory is still 107.0 MB. Free memory was 70.2 MB in the beginning and 72.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:31,974 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 107.0 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 984.16 ms. Allocated memory is still 107.0 MB. Free memory was 70.2 MB in the beginning and 72.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8 --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 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:35,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:35,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:35,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:35,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:35,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:35,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:35,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:35,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:35,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:35,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:35,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:35,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:35,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:35,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:35,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:35,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:35,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:35,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:35,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:35,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:35,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:35,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:35,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:35,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:35,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:35,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:35,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:35,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:35,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:35,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:35,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:35,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:35,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:35,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:35,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:35,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:35,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:35,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:35,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:35,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:35,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:58:35,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:35,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:35,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:35,331 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:35,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:35,332 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:35,332 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:35,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:35,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:35,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:58:35,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:58:35,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:35,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:35,336 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:58:35,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:58:35,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:35,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:35,337 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:58:35,337 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:58:35,338 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:58:35,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:35,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:35,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:58:35,339 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:58:35,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:35,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:35,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:35,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:58:35,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:35,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:35,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:35,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:35,341 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:58:35,342 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:35,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:35,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:35,342 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 [2021-11-07 01:58:35,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:35,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:35,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:35,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:35,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:35,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-07 01:58:35,971 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/7fbe19148/3a37254440064c9d994636211ffc8ca1/FLAG1c2e4146e [2021-11-07 01:58:36,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:36,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-07 01:58:36,992 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/7fbe19148/3a37254440064c9d994636211ffc8ca1/FLAG1c2e4146e [2021-11-07 01:58:37,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/data/7fbe19148/3a37254440064c9d994636211ffc8ca1 [2021-11-07 01:58:37,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:37,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:37,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:37,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:37,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:37,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:37" (1/1) ... [2021-11-07 01:58:37,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7984f1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:37, skipping insertion in model container [2021-11-07 01:58:37,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:37" (1/1) ... [2021-11-07 01:58:37,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:37,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:37,981 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-07 01:58:38,206 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-07 01:58:38,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:38,277 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:58:38,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:38,373 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-07 01:58:38,501 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-07 01:58:38,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:38,528 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:58:38,582 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-07 01:58:38,672 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_81018a6a-4716-4ffe-9134-6fdc5f189d17/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-07 01:58:38,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:38,785 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:58:38,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38 WrapperNode [2021-11-07 01:58:38,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:38,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:38,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:58:38,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:58:38,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:38,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:38,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:38,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:58:38,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:58:38,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:58:39,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:58:39,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:58:39,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:58:39,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:58:39,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:39,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:58:39,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:58:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:58:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:58:46,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:58:46,678 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-07 01:58:46,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:46 BoogieIcfgContainer [2021-11-07 01:58:46,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:58:46,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:58:46,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:58:46,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:58:46,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:37" (1/3) ... [2021-11-07 01:58:46,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ba2fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:46, skipping insertion in model container [2021-11-07 01:58:46,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (2/3) ... [2021-11-07 01:58:46,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ba2fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:46, skipping insertion in model container [2021-11-07 01:58:46,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:46" (3/3) ... [2021-11-07 01:58:46,698 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test2-2.i [2021-11-07 01:58:46,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:58:46,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 540 error locations. [2021-11-07 01:58:46,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:58:46,789 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:58:46,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 540 error locations. [2021-11-07 01:58:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 1089 states, 548 states have (on average 2.2354014598540144) internal successors, (1225), 1088 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:58:46,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:46,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:58:46,876 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:58:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 01:58:46,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:46,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693150692] [2021-11-07 01:58:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:46,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:46,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:46,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:58:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:47,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:58:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:47,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:47,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:47,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693150692] [2021-11-07 01:58:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693150692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:47,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:47,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:58:47,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065780135] [2021-11-07 01:58:47,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:47,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:47,431 INFO L87 Difference]: Start difference. First operand has 1089 states, 548 states have (on average 2.2354014598540144) internal successors, (1225), 1088 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:50,397 INFO L93 Difference]: Finished difference Result 1253 states and 1325 transitions. [2021-11-07 01:58:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:50,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:58:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:50,432 INFO L225 Difference]: With dead ends: 1253 [2021-11-07 01:58:50,432 INFO L226 Difference]: Without dead ends: 1251 [2021-11-07 01:58:50,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-07 01:58:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1073. [2021-11-07 01:58:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 548 states have (on average 2.0748175182481754) internal successors, (1137), 1072 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1137 transitions. [2021-11-07 01:58:50,566 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1137 transitions. Word has length 3 [2021-11-07 01:58:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:50,567 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1137 transitions. [2021-11-07 01:58:50,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1137 transitions. [2021-11-07 01:58:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:58:50,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:50,568 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:58:50,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:50,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:50,798 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:58:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 01:58:50,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:50,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141429350] [2021-11-07 01:58:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:50,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:50,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:50,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:58:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:58:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:51,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:58:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:51,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:51,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:51,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141429350] [2021-11-07 01:58:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141429350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:51,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:51,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:58:51,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493080076] [2021-11-07 01:58:51,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:51,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:51,232 INFO L87 Difference]: Start difference. First operand 1073 states and 1137 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:57,822 INFO L93 Difference]: Finished difference Result 1576 states and 1680 transitions. [2021-11-07 01:58:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-11-07 01:58:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:57,834 INFO L225 Difference]: With dead ends: 1576 [2021-11-07 01:58:57,835 INFO L226 Difference]: Without dead ends: 1576 [2021-11-07 01:58:57,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-11-07 01:58:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1108. [2021-11-07 01:58:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 592 states have (on average 2.054054054054054) internal successors, (1216), 1107 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1216 transitions. [2021-11-07 01:58:57,877 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1216 transitions. Word has length 3 [2021-11-07 01:58:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:57,878 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1216 transitions. [2021-11-07 01:58:57,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1216 transitions. [2021-11-07 01:58:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:58:57,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:57,880 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:57,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:58,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:58,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:58:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-07 01:58:58,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:58,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698421372] [2021-11-07 01:58:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:58,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:58,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:58,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:58:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:58,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:58,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:58:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:58,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:58,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:58,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698421372] [2021-11-07 01:58:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698421372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:58,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:58,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:58:58,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762771609] [2021-11-07 01:58:58,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:58,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:58,404 INFO L87 Difference]: Start difference. First operand 1108 states and 1216 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-07 01:59:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:00,669 INFO L93 Difference]: Finished difference Result 1295 states and 1425 transitions. [2021-11-07 01:59:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:00,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 8 [2021-11-07 01:59:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:00,680 INFO L225 Difference]: With dead ends: 1295 [2021-11-07 01:59:00,680 INFO L226 Difference]: Without dead ends: 1295 [2021-11-07 01:59:00,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-07 01:59:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1061. [2021-11-07 01:59:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 592 states have (on average 1.9695945945945945) internal successors, (1166), 1060 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1166 transitions. [2021-11-07 01:59:00,715 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1166 transitions. Word has length 8 [2021-11-07 01:59:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:00,715 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1166 transitions. [2021-11-07 01:59:00,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-07 01:59:00,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1166 transitions. [2021-11-07 01:59:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:59:00,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:00,717 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:00,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:00,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:00,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-07 01:59:00,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:00,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431447280] [2021-11-07 01:59:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:00,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:00,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:00,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:00,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:59:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:01,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:59:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:01,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:01,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:01,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431447280] [2021-11-07 01:59:01,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431447280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:01,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:01,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:59:01,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445124619] [2021-11-07 01:59:01,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:01,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:01,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:01,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:01,352 INFO L87 Difference]: Start difference. First operand 1061 states and 1166 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:08,128 INFO L93 Difference]: Finished difference Result 1325 states and 1419 transitions. [2021-11-07 01:59:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:59:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:08,138 INFO L225 Difference]: With dead ends: 1325 [2021-11-07 01:59:08,139 INFO L226 Difference]: Without dead ends: 1325 [2021-11-07 01:59:08,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-07 01:59:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1051. [2021-11-07 01:59:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 592 states have (on average 1.947635135135135) internal successors, (1153), 1050 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1153 transitions. [2021-11-07 01:59:08,186 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1153 transitions. Word has length 8 [2021-11-07 01:59:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1153 transitions. [2021-11-07 01:59:08,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1153 transitions. [2021-11-07 01:59:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:59:08,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:08,188 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:08,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:08,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:08,405 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr434REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -945756139, now seen corresponding path program 1 times [2021-11-07 01:59:08,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:08,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448132941] [2021-11-07 01:59:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:08,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:08,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:08,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:08,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:59:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:08,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:08,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:08,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448132941] [2021-11-07 01:59:08,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448132941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:08,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:08,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:08,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050507083] [2021-11-07 01:59:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:08,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:08,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:08,877 INFO L87 Difference]: Start difference. First operand 1051 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:09,258 INFO L93 Difference]: Finished difference Result 1534 states and 1675 transitions. [2021-11-07 01:59:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 01:59:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:09,271 INFO L225 Difference]: With dead ends: 1534 [2021-11-07 01:59:09,272 INFO L226 Difference]: Without dead ends: 1534 [2021-11-07 01:59:09,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-11-07 01:59:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1231. [2021-11-07 01:59:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 772 states have (on average 1.8976683937823835) internal successors, (1465), 1230 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1465 transitions. [2021-11-07 01:59:09,310 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1465 transitions. Word has length 11 [2021-11-07 01:59:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:09,311 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 1465 transitions. [2021-11-07 01:59:09,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1465 transitions. [2021-11-07 01:59:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:59:09,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:09,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:09,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:09,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:09,533 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1258779124, now seen corresponding path program 1 times [2021-11-07 01:59:09,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:09,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74301149] [2021-11-07 01:59:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:09,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:09,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:09,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:59:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:09,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:09,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:09,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:09,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74301149] [2021-11-07 01:59:09,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74301149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:09,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:09,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:09,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868421027] [2021-11-07 01:59:09,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:09,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:09,835 INFO L87 Difference]: Start difference. First operand 1231 states and 1465 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:09,878 INFO L93 Difference]: Finished difference Result 1385 states and 1605 transitions. [2021-11-07 01:59:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:59:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:09,888 INFO L225 Difference]: With dead ends: 1385 [2021-11-07 01:59:09,888 INFO L226 Difference]: Without dead ends: 1385 [2021-11-07 01:59:09,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-11-07 01:59:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1171. [2021-11-07 01:59:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 736 states have (on average 1.8736413043478262) internal successors, (1379), 1170 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1379 transitions. [2021-11-07 01:59:09,951 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1379 transitions. Word has length 13 [2021-11-07 01:59:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:09,952 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1379 transitions. [2021-11-07 01:59:09,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1379 transitions. [2021-11-07 01:59:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:59:09,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:09,954 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:09,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:10,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:10,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr539ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash -28488695, now seen corresponding path program 1 times [2021-11-07 01:59:10,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:10,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382541651] [2021-11-07 01:59:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:10,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:10,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:10,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:59:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:10,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:59:10,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:59:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:59:10,537 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:59:10,537 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:59:10,645 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:59:10,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:59:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:10,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:10,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382541651] [2021-11-07 01:59:10,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382541651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:10,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:10,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:59:10,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703518406] [2021-11-07 01:59:10,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:10,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:10,797 INFO L87 Difference]: Start difference. First operand 1171 states and 1379 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:13,379 INFO L93 Difference]: Finished difference Result 1518 states and 1772 transitions. [2021-11-07 01:59:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:13,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 14 [2021-11-07 01:59:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:13,390 INFO L225 Difference]: With dead ends: 1518 [2021-11-07 01:59:13,390 INFO L226 Difference]: Without dead ends: 1518 [2021-11-07 01:59:13,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:59:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-11-07 01:59:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1170. [2021-11-07 01:59:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 735 states have (on average 1.873469387755102) internal successors, (1377), 1169 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1377 transitions. [2021-11-07 01:59:13,431 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1377 transitions. Word has length 14 [2021-11-07 01:59:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:13,431 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1377 transitions. [2021-11-07 01:59:13,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1377 transitions. [2021-11-07 01:59:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:59:13,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:13,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:13,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:13,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:13,647 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-07 01:59:13,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:13,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775700255] [2021-11-07 01:59:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:13,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:13,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:13,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:59:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:13,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:13,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:14,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:14,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775700255] [2021-11-07 01:59:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775700255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:14,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256543230] [2021-11-07 01:59:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:14,059 INFO L87 Difference]: Start difference. First operand 1170 states and 1377 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:14,102 INFO L93 Difference]: Finished difference Result 1110 states and 1291 transitions. [2021-11-07 01:59:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:59:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:14,110 INFO L225 Difference]: With dead ends: 1110 [2021-11-07 01:59:14,110 INFO L226 Difference]: Without dead ends: 1110 [2021-11-07 01:59:14,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-07 01:59:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2021-11-07 01:59:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 699 states have (on average 1.8469241773962803) internal successors, (1291), 1109 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1291 transitions. [2021-11-07 01:59:14,138 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1291 transitions. Word has length 18 [2021-11-07 01:59:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:14,138 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1291 transitions. [2021-11-07 01:59:14,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1291 transitions. [2021-11-07 01:59:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:59:14,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:14,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:14,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:14,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:14,358 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-07 01:59:14,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:14,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195453690] [2021-11-07 01:59:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:14,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:14,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:14,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:59:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:14,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:14,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:14,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195453690] [2021-11-07 01:59:14,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195453690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:14,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:14,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:59:14,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388983718] [2021-11-07 01:59:14,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:59:14,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:59:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:14,763 INFO L87 Difference]: Start difference. First operand 1110 states and 1291 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:14,870 INFO L93 Difference]: Finished difference Result 1082 states and 1235 transitions. [2021-11-07 01:59:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 20 [2021-11-07 01:59:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:14,875 INFO L225 Difference]: With dead ends: 1082 [2021-11-07 01:59:14,875 INFO L226 Difference]: Without dead ends: 1082 [2021-11-07 01:59:14,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-07 01:59:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2021-11-07 01:59:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 683 states have (on average 1.8052708638360175) internal successors, (1233), 1079 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1233 transitions. [2021-11-07 01:59:14,902 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1233 transitions. Word has length 20 [2021-11-07 01:59:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:14,903 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1233 transitions. [2021-11-07 01:59:14,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1233 transitions. [2021-11-07 01:59:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:59:14,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:14,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:14,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:15,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:15,119 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-07 01:59:15,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:15,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498841213] [2021-11-07 01:59:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:15,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:15,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:15,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:15,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:59:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:59:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:15,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:15,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:15,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498841213] [2021-11-07 01:59:15,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498841213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:15,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:15,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:15,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864008798] [2021-11-07 01:59:15,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:15,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:15,779 INFO L87 Difference]: Start difference. First operand 1080 states and 1233 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:18,307 INFO L93 Difference]: Finished difference Result 1543 states and 1775 transitions. [2021-11-07 01:59:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:59:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 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 [2021-11-07 01:59:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:18,319 INFO L225 Difference]: With dead ends: 1543 [2021-11-07 01:59:18,319 INFO L226 Difference]: Without dead ends: 1543 [2021-11-07 01:59:18,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-07 01:59:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1076. [2021-11-07 01:59:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 683 states have (on average 1.7935578330893118) internal successors, (1225), 1075 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1225 transitions. [2021-11-07 01:59:18,353 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1225 transitions. Word has length 34 [2021-11-07 01:59:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:18,354 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1225 transitions. [2021-11-07 01:59:18,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1225 transitions. [2021-11-07 01:59:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:59:18,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:18,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:18,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:18,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:18,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-07 01:59:18,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:18,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826141087] [2021-11-07 01:59:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:18,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:18,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:18,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:18,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:59:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:59:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:18,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:59:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:19,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:19,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:19,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826141087] [2021-11-07 01:59:19,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826141087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:19,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:19,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:59:19,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769116414] [2021-11-07 01:59:19,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:19,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:19,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:19,931 INFO L87 Difference]: Start difference. First operand 1076 states and 1225 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:28,193 INFO L93 Difference]: Finished difference Result 1597 states and 1792 transitions. [2021-11-07 01:59:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:59:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 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 [2021-11-07 01:59:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:28,205 INFO L225 Difference]: With dead ends: 1597 [2021-11-07 01:59:28,205 INFO L226 Difference]: Without dead ends: 1597 [2021-11-07 01:59:28,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-11-07 01:59:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1072. [2021-11-07 01:59:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 683 states have (on average 1.7818448023426061) internal successors, (1217), 1071 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1217 transitions. [2021-11-07 01:59:28,233 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1217 transitions. Word has length 34 [2021-11-07 01:59:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:28,234 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1217 transitions. [2021-11-07 01:59:28,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1217 transitions. [2021-11-07 01:59:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:59:28,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:28,237 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:28,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:28,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:28,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-07 01:59:28,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:28,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042030150] [2021-11-07 01:59:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:28,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:28,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:28,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:59:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:28,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:29,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:29,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:29,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042030150] [2021-11-07 01:59:29,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042030150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:29,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:29,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:59:29,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184336476] [2021-11-07 01:59:29,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:29,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:29,223 INFO L87 Difference]: Start difference. First operand 1072 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:29,283 INFO L93 Difference]: Finished difference Result 1060 states and 1197 transitions. [2021-11-07 01:59:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2021-11-07 01:59:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:29,289 INFO L225 Difference]: With dead ends: 1060 [2021-11-07 01:59:29,289 INFO L226 Difference]: Without dead ends: 1060 [2021-11-07 01:59:29,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-07 01:59:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2021-11-07 01:59:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 671 states have (on average 1.7839046199701938) internal successors, (1197), 1059 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1197 transitions. [2021-11-07 01:59:29,310 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1197 transitions. Word has length 52 [2021-11-07 01:59:29,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:29,311 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1197 transitions. [2021-11-07 01:59:29,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1197 transitions. [2021-11-07 01:59:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:59:29,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:29,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:29,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:29,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:29,530 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-07 01:59:29,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:29,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633353045] [2021-11-07 01:59:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:29,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:29,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:29,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:59:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:30,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:59:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:30,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:59:30,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:59:31,156 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:59:31,158 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 [2021-11-07 01:59:31,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:59:31,169 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 [2021-11-07 01:59:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:31,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:39,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:39,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633353045] [2021-11-07 01:59:39,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633353045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:39,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:39,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:59:39,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384478103] [2021-11-07 01:59:39,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:39,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-11-07 01:59:39,816 INFO L87 Difference]: Start difference. First operand 1060 states and 1197 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:54,820 INFO L93 Difference]: Finished difference Result 1293 states and 1503 transitions. [2021-11-07 01:59:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:59:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 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 60 [2021-11-07 01:59:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:54,828 INFO L225 Difference]: With dead ends: 1293 [2021-11-07 01:59:54,828 INFO L226 Difference]: Without dead ends: 1293 [2021-11-07 01:59:54,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26, Invalid=27, Unknown=3, NotChecked=0, Total=56 [2021-11-07 01:59:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-11-07 01:59:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1022. [2021-11-07 01:59:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 671 states have (on average 1.7272727272727273) internal successors, (1159), 1021 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1159 transitions. [2021-11-07 01:59:54,851 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1159 transitions. Word has length 60 [2021-11-07 01:59:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:54,852 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1159 transitions. [2021-11-07 01:59:54,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1159 transitions. [2021-11-07 01:59:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:59:54,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:54,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:54,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:59:55,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:55,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:59:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-07 01:59:55,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:55,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615859683] [2021-11-07 01:59:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:55,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:55,071 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:59:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:59:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:55,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:59:55,817 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 24 treesize of output 20 [2021-11-07 01:59:55,882 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 26 treesize of output 14 [2021-11-07 01:59:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:55,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:56,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:56,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615859683] [2021-11-07 01:59:56,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615859683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:56,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:56,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:59:56,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582198663] [2021-11-07 01:59:56,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:56,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:56,191 INFO L87 Difference]: Start difference. First operand 1022 states and 1159 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:03,371 INFO L93 Difference]: Finished difference Result 1682 states and 1907 transitions. [2021-11-07 02:00:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:00:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 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 66 [2021-11-07 02:00:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:03,381 INFO L225 Difference]: With dead ends: 1682 [2021-11-07 02:00:03,382 INFO L226 Difference]: Without dead ends: 1682 [2021-11-07 02:00:03,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:00:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-07 02:00:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1021. [2021-11-07 02:00:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 671 states have (on average 1.7257824143070044) internal successors, (1158), 1020 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1158 transitions. [2021-11-07 02:00:03,408 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1158 transitions. Word has length 66 [2021-11-07 02:00:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:03,408 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1158 transitions. [2021-11-07 02:00:03,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1158 transitions. [2021-11-07 02:00:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:00:03,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:03,411 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:03,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:03,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:03,625 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 02:00:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-07 02:00:03,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:03,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576096785] [2021-11-07 02:00:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:03,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:03,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:03,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:03,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:00:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:00:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:04,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:00:04,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 02:00:04,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-07 02:00:04,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 02:00:04,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 02:00:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:04,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:05,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:05,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576096785] [2021-11-07 02:00:05,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576096785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:05,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:05,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:00:05,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186916668] [2021-11-07 02:00:05,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:00:05,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:00:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:00:05,465 INFO L87 Difference]: Start difference. First operand 1021 states and 1158 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:25,157 INFO L93 Difference]: Finished difference Result 1533 states and 1721 transitions. [2021-11-07 02:00:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:00:25,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 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 67 [2021-11-07 02:00:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:25,165 INFO L225 Difference]: With dead ends: 1533 [2021-11-07 02:00:25,165 INFO L226 Difference]: Without dead ends: 1533 [2021-11-07 02:00:25,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:00:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-11-07 02:00:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1020. [2021-11-07 02:00:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 671 states have (on average 1.7242921013412817) internal successors, (1157), 1019 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1157 transitions. [2021-11-07 02:00:25,186 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1157 transitions. Word has length 67 [2021-11-07 02:00:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:25,187 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1157 transitions. [2021-11-07 02:00:25,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1157 transitions. [2021-11-07 02:00:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:00:25,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:25,189 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:25,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:00:25,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:25,407 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 02:00:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-07 02:00:25,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:25,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255487404] [2021-11-07 02:00:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:25,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:25,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:25,411 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:25,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:00:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:26,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:00:26,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:26,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:26,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:26,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255487404] [2021-11-07 02:00:26,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255487404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:26,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:26,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:00:26,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20699267] [2021-11-07 02:00:26,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:00:26,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:00:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:00:26,378 INFO L87 Difference]: Start difference. First operand 1020 states and 1157 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:26,552 INFO L93 Difference]: Finished difference Result 1890 states and 2124 transitions. [2021-11-07 02:00:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:00:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 71 [2021-11-07 02:00:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:26,561 INFO L225 Difference]: With dead ends: 1890 [2021-11-07 02:00:26,562 INFO L226 Difference]: Without dead ends: 1890 [2021-11-07 02:00:26,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-11-07 02:00:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1023. [2021-11-07 02:00:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 674 states have (on average 1.7210682492581602) internal successors, (1160), 1022 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1160 transitions. [2021-11-07 02:00:26,579 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1160 transitions. Word has length 71 [2021-11-07 02:00:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:26,580 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1160 transitions. [2021-11-07 02:00:26,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1160 transitions. [2021-11-07 02:00:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:00:26,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:26,581 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:26,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:26,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:26,781 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 02:00:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-07 02:00:26,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:26,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078402923] [2021-11-07 02:00:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:26,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:26,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:26,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:00:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:00:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:27,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:28,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:28,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078402923] [2021-11-07 02:00:28,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078402923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:28,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070669997] [2021-11-07 02:00:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:28,016 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:28,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:28,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:28,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:00:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:00:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:29,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:29,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2070669997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:29,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050209933] [2021-11-07 02:00:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:29,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:00:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:29,532 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:00:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 02:00:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:00:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:30,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:30,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050209933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:30,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:00:30,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 02:00:30,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823332254] [2021-11-07 02:00:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:00:30,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:00:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:00:30,946 INFO L87 Difference]: Start difference. First operand 1023 states and 1160 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:32,284 INFO L93 Difference]: Finished difference Result 2773 states and 3104 transitions. [2021-11-07 02:00:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:00:32,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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 73 [2021-11-07 02:00:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:32,303 INFO L225 Difference]: With dead ends: 2773 [2021-11-07 02:00:32,303 INFO L226 Difference]: Without dead ends: 2773 [2021-11-07 02:00:32,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:00:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-11-07 02:00:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1032. [2021-11-07 02:00:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 683 states have (on average 1.7144948755490483) internal successors, (1171), 1031 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1171 transitions. [2021-11-07 02:00:32,340 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1171 transitions. Word has length 73 [2021-11-07 02:00:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:32,341 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1171 transitions. [2021-11-07 02:00:32,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1171 transitions. [2021-11-07 02:00:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:00:32,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:32,343 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:32,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:32,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:00:32,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-07 02:00:32,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:00:32,951 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 02:00:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-07 02:00:32,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:32,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7841731] [2021-11-07 02:00:32,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:00:32,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:32,955 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:32,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:00:34,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:00:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:00:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:00:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:34,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:35,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:35,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7841731] [2021-11-07 02:00:35,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7841731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:35,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436628307] [2021-11-07 02:00:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:00:35,365 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:00:35,366 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:00:35,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:00:37,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:00:37,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:00:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:00:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:37,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:37,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436628307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:00:37,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311293760] [2021-11-07 02:00:37,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:00:37,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:00:37,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:37,901 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:00:37,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 02:00:51,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:00:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:00:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 02:00:51,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:52,296 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:00:52,297 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 18 treesize of output 18 [2021-11-07 02:00:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:00:52,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 02:00:52,472 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 23 treesize of output 19 [2021-11-07 02:00:53,105 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-07 02:00:53,106 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 68 treesize of output 67 [2021-11-07 02:00:53,149 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 02:00:53,150 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 64 treesize of output 51 [2021-11-07 02:00:55,582 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:00:55,582 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 88 treesize of output 90 [2021-11-07 02:00:55,645 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:00:55,646 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 84 treesize of output 74 [2021-11-07 02:00:56,720 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:00:56,721 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 88 treesize of output 90 [2021-11-07 02:00:57,485 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:00:57,485 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 84 treesize of output 74 [2021-11-07 02:00:57,762 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:00:57,763 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 88 treesize of output 90 [2021-11-07 02:00:58,447 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:00:58,447 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 84 treesize of output 74 [2021-11-07 02:01:00,540 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:01:00,540 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 88 treesize of output 90 [2021-11-07 02:01:01,821 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:01:01,822 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 84 treesize of output 74 [2021-11-07 02:01:02,171 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:01:02,171 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 115 treesize of output 78 [2021-11-07 02:01:06,033 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-07 02:01:06,034 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 105 treesize of output 101 [2021-11-07 02:01:06,690 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 02:01:06,690 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 113 treesize of output 62 [2021-11-07 02:01:06,707 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 02:01:06,708 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-07 02:01:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:01:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:20,513 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (v_subst_1 (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse2 (bvadd v_subst_1 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse3 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (_ bv20 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 .cse1) .cse2 .cse1))) c_ULTIMATE.start_main_~user~0.base) .cse3)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse3))))) (forall ((v_subst_2 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse5 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse5) (bvadd v_subst_2 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse5))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse4) (bvadd (_ bv20 32) .cse4))))) is different from false [2021-11-07 02:02:28,664 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse0 (let ((.cse3 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse3))) (store |c_#memory_$Pointer$.offset| .cse1 (let ((.cse2 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| .cse1) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse2) (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse2)))) c_ULTIMATE.start_main_~user~0.base) .cse3)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse8 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse8)) (.cse5 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse7 (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse4 (let ((.cse6 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| .cse4) .cse5 .cse6) .cse7 .cse6))) c_ULTIMATE.start_main_~user~0.base) .cse8) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse4 (store (store (select |c_#memory_$Pointer$.base| .cse4) .cse5 (_ bv0 32)) .cse7 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse8))))))) is different from false [2021-11-07 02:02:32,544 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 26 treesize of output 24 [2021-11-07 02:02:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-07 02:02:33,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311293760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:33,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:02:33,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 12] total 36 [2021-11-07 02:02:33,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625621586] [2021-11-07 02:02:33,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 02:02:33,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:33,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 02:02:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=951, Unknown=16, NotChecked=130, Total=1260 [2021-11-07 02:02:33,017 INFO L87 Difference]: Start difference. First operand 1032 states and 1171 transitions. Second operand has 36 states, 36 states have (on average 4.805555555555555) internal successors, (173), 36 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:04,279 WARN L207 SmtUtils]: Spent 39.15 s on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-11-07 02:05:12,853 WARN L207 SmtUtils]: Spent 32.33 s on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-11-07 02:09:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:07,623 INFO L93 Difference]: Finished difference Result 1981 states and 2281 transitions. [2021-11-07 02:09:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 02:09:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.805555555555555) internal successors, (173), 36 states have internal predecessors, (173), 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 77 [2021-11-07 02:09:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:07,634 INFO L225 Difference]: With dead ends: 1981 [2021-11-07 02:09:07,635 INFO L226 Difference]: Without dead ends: 1981 [2021-11-07 02:09:07,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 418 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 238.8s TimeCoverageRelationStatistics Valid=1028, Invalid=3912, Unknown=38, NotChecked=278, Total=5256 [2021-11-07 02:09:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-11-07 02:09:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1043. [2021-11-07 02:09:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 695 states have (on average 1.7007194244604316) internal successors, (1182), 1042 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1182 transitions. [2021-11-07 02:09:07,660 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1182 transitions. Word has length 77 [2021-11-07 02:09:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:07,660 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1182 transitions. [2021-11-07 02:09:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.805555555555555) internal successors, (173), 36 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1182 transitions. [2021-11-07 02:09:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:09:07,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:07,662 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:07,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:07,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 02:09:08,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 02:09:08,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:08,275 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 02:09:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 688279333, now seen corresponding path program 1 times [2021-11-07 02:09:08,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:08,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215649653] [2021-11-07 02:09:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:08,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:08,278 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:08,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:09:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:09,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:09:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:11,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:11,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215649653] [2021-11-07 02:09:11,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215649653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:11,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238666311] [2021-11-07 02:09:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:11,937 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:11,938 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:11,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:09:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:13,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:09:13,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:13,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:13,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [238666311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:13,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604581509] [2021-11-07 02:09:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:13,729 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:13,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 02:09:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:14,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:09:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:15,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:20,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604581509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:20,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:09:20,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 49 [2021-11-07 02:09:20,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103602469] [2021-11-07 02:09:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 02:09:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 02:09:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1760, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 02:09:20,101 INFO L87 Difference]: Start difference. First operand 1043 states and 1182 transitions. Second operand has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:58,810 INFO L93 Difference]: Finished difference Result 12148 states and 13537 transitions. [2021-11-07 02:09:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 02:09:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 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 85 [2021-11-07 02:09:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:58,855 INFO L225 Difference]: With dead ends: 12148 [2021-11-07 02:09:58,863 INFO L226 Difference]: Without dead ends: 12148 [2021-11-07 02:09:58,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2957 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=3045, Invalid=8511, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 02:09:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12148 states. [2021-11-07 02:09:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12148 to 1079. [2021-11-07 02:09:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 731 states have (on average 1.6812585499316006) internal successors, (1229), 1078 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1229 transitions. [2021-11-07 02:09:58,953 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1229 transitions. Word has length 85 [2021-11-07 02:09:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:58,953 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1229 transitions. [2021-11-07 02:09:58,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1229 transitions. [2021-11-07 02:09:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 02:09:58,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:58,956 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:58,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:59,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:59,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:59,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:59,569 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 02:09:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2300123, now seen corresponding path program 2 times [2021-11-07 02:09:59,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:59,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510581331] [2021-11-07 02:09:59,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:09:59,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:59,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:59,572 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:59,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:10:00,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:00,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 02:10:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:03,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:08,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:08,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510581331] [2021-11-07 02:10:08,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510581331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:08,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209368086] [2021-11-07 02:10:08,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:08,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:08,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:08,136 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:08,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:10:10,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:10,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 02:10:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:11,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:11,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209368086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:11,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411769853] [2021-11-07 02:10:11,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:11,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:11,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:11,541 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:11,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81018a6a-4716-4ffe-9134-6fdc5f189d17/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 02:10:50,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:50,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 02:10:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:50,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:10:50,807 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 18 treesize of output 18 [2021-11-07 02:10:51,017 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 18 treesize of output 14 [2021-11-07 02:10:52,197 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 02:10:52,198 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 33 treesize of output 26 [2021-11-07 02:10:57,744 WARN L207 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2021-11-07 02:10:57,744 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:10:57,745 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:02,657 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:02,657 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:04,757 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:04,757 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:05,219 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:05,219 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:05,685 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:05,686 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:10,159 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:10,159 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:10,649 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:10,650 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:12,228 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:12,228 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:12,634 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:12,634 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:16,235 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:16,236 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:16,627 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:16,628 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:17,040 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:17,041 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:19,183 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:19,184 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:19,633 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:19,633 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:21,582 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:21,582 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:24,888 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:24,889 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:25,343 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:25,343 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:25,796 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:25,797 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:26,258 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:26,258 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:31,936 WARN L207 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2021-11-07 02:11:31,937 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:31,937 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:33,773 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:33,774 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:34,210 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:34,210 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:36,809 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:36,809 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:38,509 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:38,510 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:38,903 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:38,903 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:39,323 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:39,323 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:44,312 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-07 02:11:44,312 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 38 [2021-11-07 02:11:44,714 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 02:11:44,714 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:11:45,187 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:11:45,188 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 66 treesize of output 47 [2021-11-07 02:11:45,752 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 02:11:45,752 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 66 treesize of output 27 [2021-11-07 02:11:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-07 02:11:45,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:48,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))) (_ bv1 1)))) is different from false