./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:21:51,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:21:51,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:21:51,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:21:51,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:21:51,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:21:51,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:21:51,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:21:51,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:21:51,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:21:51,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:21:51,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:21:51,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:21:51,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:21:51,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:21:51,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:21:51,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:21:51,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:21:51,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:21:51,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:21:51,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:21:51,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:21:51,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:21:51,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:21:51,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:21:51,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:21:51,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:21:51,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:21:51,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:21:51,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:21:51,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:21:51,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:21:51,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:21:51,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:21:51,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:21:51,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:21:51,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:21:51,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:21:51,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:21:51,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:21:51,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:21:51,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:21:51,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:21:51,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:21:51,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:21:51,705 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:21:51,706 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:21:51,706 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:21:51,706 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:21:51,706 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:21:51,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:21:51,707 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:21:51,707 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:21:51,707 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:21:51,707 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:21:51,707 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:21:51,708 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:21:51,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:21:51,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:21:51,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:21:51,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:21:51,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:21:51,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:21:51,710 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:21:51,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:21:51,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:21:51,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:21:51,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:21:51,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:21:51,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:21:51,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:21:51,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:21:51,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:21:51,712 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:21:51,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:21:51,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:21:51,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:21:51,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:21:51,713 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-07 01:21:52,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:21:52,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:21:52,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:21:52,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:21:52,065 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:21:52,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-07 01:21:52,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/297d21b81/d68dd30f8505427ab83de29166256702/FLAGf00009226 [2021-11-07 01:21:52,943 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:21:52,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-07 01:21:53,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/297d21b81/d68dd30f8505427ab83de29166256702/FLAGf00009226 [2021-11-07 01:21:53,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/297d21b81/d68dd30f8505427ab83de29166256702 [2021-11-07 01:21:53,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:21:53,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:21:53,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:53,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:21:53,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:21:53,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:53" (1/1) ... [2021-11-07 01:21:53,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e135171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:53, skipping insertion in model container [2021-11-07 01:21:53,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:53" (1/1) ... [2021-11-07 01:21:53,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:21:53,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:21:53,887 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-07 01:21:53,903 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-07 01:21:53,930 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:21:53,936 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:21:54,756 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,757 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,758 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,759 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,760 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,789 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,791 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,793 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,800 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,802 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,804 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,805 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:54,805 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:21:55,274 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:21:55,275 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:21:55,276 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:21:55,277 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:21:55,279 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:21:55,280 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:21:55,281 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:21:55,282 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:21:55,282 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:21:55,283 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:21:55,489 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:21:55,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:21:55,573 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 01:21:55,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@168a8ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:55, skipping insertion in model container [2021-11-07 01:21:55,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:55,574 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:21:55,577 INFO L168 Benchmark]: Toolchain (without parser) took 2074.93 ms. Allocated memory is still 88.1 MB. Free memory was 65.6 MB in the beginning and 46.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:55,578 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 68.5 MB in the beginning and 68.5 MB in the end (delta: 66.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:21:55,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2072.31 ms. Allocated memory is still 88.1 MB. Free memory was 65.3 MB in the beginning and 46.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:55,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 68.5 MB in the beginning and 68.5 MB in the end (delta: 66.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2072.31 ms. Allocated memory is still 88.1 MB. Free memory was 65.3 MB in the beginning and 46.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:21:57,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:21:57,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:21:57,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:21:57,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:21:57,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:21:57,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:21:57,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:21:57,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:21:57,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:21:57,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:21:57,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:21:57,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:21:57,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:21:57,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:21:57,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:21:57,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:21:57,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:21:57,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:21:57,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:21:57,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:21:57,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:21:57,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:21:57,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:21:57,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:21:57,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:21:57,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:21:57,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:21:57,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:21:57,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:21:57,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:21:57,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:21:57,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:21:57,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:21:57,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:21:57,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:21:57,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:21:57,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:21:57,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:21:57,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:21:57,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:21:57,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:21:57,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:21:57,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:21:57,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:21:57,940 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:21:57,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:21:57,941 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:21:57,941 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:21:57,941 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:21:57,941 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:21:57,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:21:57,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:21:57,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:21:57,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:21:57,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:21:57,944 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:21:57,945 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:21:57,945 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:21:57,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:21:57,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:21:57,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:21:57,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:21:57,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:21:57,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:21:57,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:21:57,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:21:57,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:21:57,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:21:57,947 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:21:57,947 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:57,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:21:57,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:21:57,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:21:57,948 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-07 01:21:58,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:21:58,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:21:58,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:21:58,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:21:58,334 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:21:58,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-07 01:21:58,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/16ac1a0a5/b493144811c64265afd06f2f2244753f/FLAG3ff829b09 [2021-11-07 01:21:59,229 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:21:59,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-07 01:21:59,283 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/16ac1a0a5/b493144811c64265afd06f2f2244753f/FLAG3ff829b09 [2021-11-07 01:21:59,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/data/16ac1a0a5/b493144811c64265afd06f2f2244753f [2021-11-07 01:21:59,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:21:59,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:21:59,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:59,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:21:59,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:21:59,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:59" (1/1) ... [2021-11-07 01:21:59,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7377d228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:59, skipping insertion in model container [2021-11-07 01:21:59,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:59" (1/1) ... [2021-11-07 01:21:59,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:21:59,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:00,221 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-07 01:22:00,230 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-07 01:22:00,256 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:22:00,263 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:22:01,222 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,223 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,224 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,226 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,227 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,254 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,256 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,261 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,266 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,269 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,270 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,272 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:01,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:22:01,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:22:01,738 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:22:01,740 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:22:01,742 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:22:01,743 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:22:01,744 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:22:01,746 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:22:01,755 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:22:01,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:22:01,984 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:22:02,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:02,069 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:22:02,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:02,126 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-07 01:22:02,127 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-07 01:22:02,129 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:22:02,130 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:22:02,198 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,198 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,205 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,206 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,206 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,220 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,222 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,222 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,224 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,227 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,228 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,228 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,299 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:22:02,300 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:22:02,301 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:22:02,302 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:22:02,308 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:22:02,309 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:22:02,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:22:02,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:22:02,311 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:22:02,311 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:22:02,345 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:22:02,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:02,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:02,417 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-07 01:22:02,423 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_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-07 01:22:02,425 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:22:02,426 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:22:02,479 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,484 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,484 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,485 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,485 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,493 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,494 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,495 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,496 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,497 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,497 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,498 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,498 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:22:02,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:22:02,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:22:02,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:22:02,543 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:22:02,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:22:02,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:22:02,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:22:02,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:22:02,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:22:02,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:22:02,573 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:22:02,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:02,799 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:02,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02 WrapperNode [2021-11-07 01:22:02,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:02,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:02,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:02,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:02,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:02,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:02,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:02,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:02,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:03,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:03,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:03,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:03,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:03,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:03,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:03,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:03,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:03,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:03,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:03,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:22:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:22:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:22:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:22:03,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:03,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:22:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:22:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:22:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:22:04,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:22:04,690 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-11-07 01:22:04,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:04 BoogieIcfgContainer [2021-11-07 01:22:04,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:22:04,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:22:04,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:22:04,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:22:04,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:59" (1/3) ... [2021-11-07 01:22:04,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ca4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:04, skipping insertion in model container [2021-11-07 01:22:04,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02" (2/3) ... [2021-11-07 01:22:04,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ca4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:04, skipping insertion in model container [2021-11-07 01:22:04,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:04" (3/3) ... [2021-11-07 01:22:04,714 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-11-07 01:22:04,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:22:04,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:22:04,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:22:04,773 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 01:22:04,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:22:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 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 01:22:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:22:04,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:04,806 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] [2021-11-07 01:22:04,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash 170416363, now seen corresponding path program 1 times [2021-11-07 01:22:04,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:04,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722088057] [2021-11-07 01:22:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:04,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:04,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:04,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:22:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:22:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:05,373 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 01:22:05,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:05,516 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 01:22:05,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:05,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722088057] [2021-11-07 01:22:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722088057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:05,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:22:05,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268349884] [2021-11-07 01:22:05,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:22:05,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:22:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:22:05,542 INFO L87 Difference]: Start difference. First operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 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 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 01:22:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:05,598 INFO L93 Difference]: Finished difference Result 430 states and 629 transitions. [2021-11-07 01:22:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:22:05,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-07 01:22:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:05,618 INFO L225 Difference]: With dead ends: 430 [2021-11-07 01:22:05,618 INFO L226 Difference]: Without dead ends: 212 [2021-11-07 01:22:05,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:22:05,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-07 01:22:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-07 01:22:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.391089108910891) internal successors, (281), 211 states have internal predecessors, (281), 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 01:22:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 281 transitions. [2021-11-07 01:22:05,700 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 281 transitions. Word has length 56 [2021-11-07 01:22:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:05,700 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 281 transitions. [2021-11-07 01:22:05,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 01:22:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 281 transitions. [2021-11-07 01:22:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:22:05,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:05,707 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] [2021-11-07 01:22:05,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:05,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:05,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:05,930 INFO L85 PathProgramCache]: Analyzing trace with hash 828944299, now seen corresponding path program 1 times [2021-11-07 01:22:05,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:05,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063438500] [2021-11-07 01:22:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:05,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:05,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:05,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:05,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:22:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:06,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:22:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:06,603 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 01:22:06,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:06,831 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 01:22:06,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:06,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063438500] [2021-11-07 01:22:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063438500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:06,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:06,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:22:06,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288878095] [2021-11-07 01:22:06,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:06,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:06,839 INFO L87 Difference]: Start difference. First operand 212 states and 281 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 01:22:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:07,059 INFO L93 Difference]: Finished difference Result 404 states and 540 transitions. [2021-11-07 01:22:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56 [2021-11-07 01:22:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:07,064 INFO L225 Difference]: With dead ends: 404 [2021-11-07 01:22:07,064 INFO L226 Difference]: Without dead ends: 212 [2021-11-07 01:22:07,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-07 01:22:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-07 01:22:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.3712871287128714) internal successors, (277), 211 states have internal predecessors, (277), 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 01:22:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2021-11-07 01:22:07,098 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 56 [2021-11-07 01:22:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:07,099 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2021-11-07 01:22:07,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 01:22:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2021-11-07 01:22:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:22:07,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:07,106 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] [2021-11-07 01:22:07,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:22:07,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:07,320 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1858303597, now seen corresponding path program 1 times [2021-11-07 01:22:07,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:07,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789856852] [2021-11-07 01:22:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:07,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:07,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:07,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:22:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:22:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:07,828 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 01:22:07,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:07,942 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 01:22:07,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:07,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789856852] [2021-11-07 01:22:07,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789856852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:07,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:07,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:22:07,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707994512] [2021-11-07 01:22:07,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:07,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:07,951 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 01:22:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:08,107 INFO L93 Difference]: Finished difference Result 475 states and 607 transitions. [2021-11-07 01:22:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:08,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-07 01:22:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:08,109 INFO L225 Difference]: With dead ends: 475 [2021-11-07 01:22:08,110 INFO L226 Difference]: Without dead ends: 299 [2021-11-07 01:22:08,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 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 01:22:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-07 01:22:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 212. [2021-11-07 01:22:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.3613861386138615) internal successors, (275), 211 states have internal predecessors, (275), 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 01:22:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 275 transitions. [2021-11-07 01:22:08,125 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 275 transitions. Word has length 56 [2021-11-07 01:22:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:08,126 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 275 transitions. [2021-11-07 01:22:08,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 01:22:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 275 transitions. [2021-11-07 01:22:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:22:08,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:08,127 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 01:22:08,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:08,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:08,342 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1990287981, now seen corresponding path program 1 times [2021-11-07 01:22:08,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:08,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205933134] [2021-11-07 01:22:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:08,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:08,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:08,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:08,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:22:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:22:08,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:08,920 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 01:22:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:09,118 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 01:22:09,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:09,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205933134] [2021-11-07 01:22:09,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205933134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:09,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:09,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:22:09,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521873079] [2021-11-07 01:22:09,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:22:09,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:22:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:22:09,121 INFO L87 Difference]: Start difference. First operand 212 states and 275 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 01:22:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:09,492 INFO L93 Difference]: Finished difference Result 490 states and 627 transitions. [2021-11-07 01:22:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 01:22:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:09,495 INFO L225 Difference]: With dead ends: 490 [2021-11-07 01:22:09,495 INFO L226 Difference]: Without dead ends: 315 [2021-11-07 01:22:09,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:22:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-07 01:22:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 212. [2021-11-07 01:22:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.3415841584158417) internal successors, (271), 211 states have internal predecessors, (271), 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 01:22:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 271 transitions. [2021-11-07 01:22:09,509 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 271 transitions. Word has length 60 [2021-11-07 01:22:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:09,509 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 271 transitions. [2021-11-07 01:22:09,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 01:22:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 271 transitions. [2021-11-07 01:22:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:22:09,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:09,511 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] [2021-11-07 01:22:09,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:09,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:09,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash 49668941, now seen corresponding path program 1 times [2021-11-07 01:22:09,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:09,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118507931] [2021-11-07 01:22:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:09,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:09,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:09,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:22:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:10,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:22:10,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:10,348 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 01:22:10,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:10,588 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 01:22:10,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:10,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118507931] [2021-11-07 01:22:10,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118507931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:10,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:10,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-07 01:22:10,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84619348] [2021-11-07 01:22:10,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:22:10,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:22:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:10,590 INFO L87 Difference]: Start difference. First operand 212 states and 271 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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 01:22:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:11,242 INFO L93 Difference]: Finished difference Result 661 states and 840 transitions. [2021-11-07 01:22:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:22:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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 64 [2021-11-07 01:22:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:11,246 INFO L225 Difference]: With dead ends: 661 [2021-11-07 01:22:11,247 INFO L226 Difference]: Without dead ends: 485 [2021-11-07 01:22:11,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:22:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-07 01:22:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 216. [2021-11-07 01:22:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 206 states have (on average 1.3349514563106797) internal successors, (275), 215 states have internal predecessors, (275), 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 01:22:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2021-11-07 01:22:11,261 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 64 [2021-11-07 01:22:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:11,262 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2021-11-07 01:22:11,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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 01:22:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2021-11-07 01:22:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:22:11,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:11,263 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 01:22:11,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:22:11,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:11,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1788737394, now seen corresponding path program 1 times [2021-11-07 01:22:11,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:11,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794958541] [2021-11-07 01:22:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:11,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:11,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:11,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:11,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:22:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:22:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:12,156 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 01:22:12,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:12,343 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 01:22:12,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794958541] [2021-11-07 01:22:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794958541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:12,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:12,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 3] imperfect sequences [] total 8 [2021-11-07 01:22:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820377213] [2021-11-07 01:22:12,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:22:12,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:22:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:22:12,346 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:13,214 INFO L93 Difference]: Finished difference Result 778 states and 979 transitions. [2021-11-07 01:22:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:22:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:22:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:13,220 INFO L225 Difference]: With dead ends: 778 [2021-11-07 01:22:13,221 INFO L226 Difference]: Without dead ends: 599 [2021-11-07 01:22:13,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:22:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-07 01:22:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 222. [2021-11-07 01:22:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 212 states have (on average 1.330188679245283) internal successors, (282), 221 states have internal predecessors, (282), 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 01:22:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 282 transitions. [2021-11-07 01:22:13,244 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 282 transitions. Word has length 66 [2021-11-07 01:22:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:13,245 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 282 transitions. [2021-11-07 01:22:13,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 282 transitions. [2021-11-07 01:22:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:22:13,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:13,247 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, 1, 1, 1, 1, 1] [2021-11-07 01:22:13,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:13,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:13,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1529718097, now seen corresponding path program 1 times [2021-11-07 01:22:13,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:13,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464968317] [2021-11-07 01:22:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:13,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:13,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:13,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:22:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:13,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:22:13,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:14,180 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 01:22:14,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:14,410 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 01:22:14,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:14,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464968317] [2021-11-07 01:22:14,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464968317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:14,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:14,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-07 01:22:14,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354058725] [2021-11-07 01:22:14,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:22:14,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:22:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:22:14,412 INFO L87 Difference]: Start difference. First operand 222 states and 282 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 01:22:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:15,154 INFO L93 Difference]: Finished difference Result 679 states and 857 transitions. [2021-11-07 01:22:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:22:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 76 [2021-11-07 01:22:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:15,160 INFO L225 Difference]: With dead ends: 679 [2021-11-07 01:22:15,161 INFO L226 Difference]: Without dead ends: 487 [2021-11-07 01:22:15,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:22:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-07 01:22:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 226. [2021-11-07 01:22:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 216 states have (on average 1.3240740740740742) internal successors, (286), 225 states have internal predecessors, (286), 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 01:22:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 286 transitions. [2021-11-07 01:22:15,186 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 286 transitions. Word has length 76 [2021-11-07 01:22:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:15,187 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 286 transitions. [2021-11-07 01:22:15,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 01:22:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 286 transitions. [2021-11-07 01:22:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:22:15,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:15,188 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, 1, 1, 1, 1, 1] [2021-11-07 01:22:15,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:22:15,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:15,392 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1176629715, now seen corresponding path program 1 times [2021-11-07 01:22:15,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:15,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569509655] [2021-11-07 01:22:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:15,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:15,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:15,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:22:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:22:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:16,063 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 01:22:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:16,206 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 01:22:16,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:16,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569509655] [2021-11-07 01:22:16,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569509655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:16,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:16,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:22:16,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395781911] [2021-11-07 01:22:16,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:16,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:16,207 INFO L87 Difference]: Start difference. First operand 226 states and 286 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 01:22:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:16,484 INFO L93 Difference]: Finished difference Result 608 states and 753 transitions. [2021-11-07 01:22:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:22:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 76 [2021-11-07 01:22:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:16,487 INFO L225 Difference]: With dead ends: 608 [2021-11-07 01:22:16,487 INFO L226 Difference]: Without dead ends: 419 [2021-11-07 01:22:16,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-07 01:22:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 226. [2021-11-07 01:22:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 216 states have (on average 1.3148148148148149) internal successors, (284), 225 states have internal predecessors, (284), 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 01:22:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2021-11-07 01:22:16,505 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 76 [2021-11-07 01:22:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:16,505 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2021-11-07 01:22:16,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 01:22:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2021-11-07 01:22:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:22:16,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:16,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:16,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:16,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:16,724 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 660004237, now seen corresponding path program 1 times [2021-11-07 01:22:16,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:16,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252872363] [2021-11-07 01:22:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:16,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:16,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:16,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:16,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:22:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:22:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:17,783 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 32 treesize of output 24 [2021-11-07 01:22:17,789 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 21 treesize of output 13 [2021-11-07 01:22:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:22:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:22:18,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:18,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252872363] [2021-11-07 01:22:18,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252872363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:18,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135197177] [2021-11-07 01:22:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:18,310 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:18,316 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:18,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:22:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:22:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:19,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135197177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:19,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:22:19,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-07 01:22:19,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755428377] [2021-11-07 01:22:19,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:22:19,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:19,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:22:19,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:22:19,470 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 01:22:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:19,834 INFO L93 Difference]: Finished difference Result 717 states and 880 transitions. [2021-11-07 01:22:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:22:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 80 [2021-11-07 01:22:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:19,838 INFO L225 Difference]: With dead ends: 717 [2021-11-07 01:22:19,838 INFO L226 Difference]: Without dead ends: 526 [2021-11-07 01:22:19,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:22:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-07 01:22:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 226. [2021-11-07 01:22:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 216 states have (on average 1.3055555555555556) internal successors, (282), 225 states have internal predecessors, (282), 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 01:22:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2021-11-07 01:22:19,856 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 80 [2021-11-07 01:22:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:19,856 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2021-11-07 01:22:19,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 01:22:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2021-11-07 01:22:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:22:19,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:19,858 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:19,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:20,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:20,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:20,261 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:22:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2023690006, now seen corresponding path program 1 times [2021-11-07 01:22:20,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:20,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799314635] [2021-11-07 01:22:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:20,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:20,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:20,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:22:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:22:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:21,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:21,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 01:22:21,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:21,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 01:22:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:21,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:23,128 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 01:22:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 01:22:23,141 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:22:23,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:22:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:22:23,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:23,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799314635] [2021-11-07 01:22:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799314635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:23,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018744468] [2021-11-07 01:22:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:23,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:23,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:23,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:22:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:22:24,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:24,665 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-07 01:22:24,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-07 01:22:31,032 WARN L207 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-07 01:22:31,033 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-07 01:22:31,033 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-07 01:25:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:25:08,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:25:09,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018744468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:09,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:09,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 8] imperfect sequences [12, 11] total 35 [2021-11-07 01:25:09,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283966467] [2021-11-07 01:25:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:25:09,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:25:09,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:25:09,957 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 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 01:25:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:43,568 INFO L93 Difference]: Finished difference Result 403 states and 501 transitions. [2021-11-07 01:25:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:25:43,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 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 82 [2021-11-07 01:25:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:43,572 INFO L225 Difference]: With dead ends: 403 [2021-11-07 01:25:43,572 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 01:25:43,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=304, Invalid=2048, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 01:25:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 01:25:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2021-11-07 01:25:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 217 states have (on average 1.304147465437788) internal successors, (283), 226 states have internal predecessors, (283), 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 01:25:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 283 transitions. [2021-11-07 01:25:43,596 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 283 transitions. Word has length 82 [2021-11-07 01:25:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:43,596 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 283 transitions. [2021-11-07 01:25:43,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 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 01:25:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 283 transitions. [2021-11-07 01:25:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:25:43,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:43,598 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:43,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:43,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:44,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:44,018 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:25:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2021842964, now seen corresponding path program 1 times [2021-11-07 01:25:44,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:44,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660976101] [2021-11-07 01:25:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:44,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:44,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:44,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:44,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:25:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:25:44,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:45,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:25:45,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 01:25:45,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:25:45,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 01:25:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:25:45,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:46,899 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 01:25:46,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 01:25:46,910 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:25:46,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:25:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:25:46,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:46,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660976101] [2021-11-07 01:25:46,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660976101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:46,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111074989] [2021-11-07 01:25:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:46,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:46,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:25:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 01:25:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:48,533 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 01:25:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-07 01:25:49,747 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 41 treesize of output 29 [2021-11-07 01:25:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:25:49,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:50,718 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 96 treesize of output 90 [2021-11-07 01:25:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:25:51,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111074989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:51,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:51,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [12, 11] total 35 [2021-11-07 01:25:51,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800665346] [2021-11-07 01:25:51,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:25:51,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:25:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:25:51,034 INFO L87 Difference]: Start difference. First operand 227 states and 283 transitions. Second operand has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 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 01:25:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:55,830 INFO L93 Difference]: Finished difference Result 667 states and 837 transitions. [2021-11-07 01:25:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:25:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 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 82 [2021-11-07 01:25:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:55,833 INFO L225 Difference]: With dead ends: 667 [2021-11-07 01:25:55,833 INFO L226 Difference]: Without dead ends: 466 [2021-11-07 01:25:55,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:25:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-07 01:25:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 233. [2021-11-07 01:25:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 223 states have (on average 1.295964125560538) internal successors, (289), 232 states have internal predecessors, (289), 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 01:25:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 289 transitions. [2021-11-07 01:25:55,864 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 289 transitions. Word has length 82 [2021-11-07 01:25:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:55,864 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 289 transitions. [2021-11-07 01:25:55,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 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 01:25:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 289 transitions. [2021-11-07 01:25:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:25:55,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:55,866 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:55,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:56,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:56,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:56,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:25:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash -246835602, now seen corresponding path program 1 times [2021-11-07 01:25:56,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:56,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869246142] [2021-11-07 01:25:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:56,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:56,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:56,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:25:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:25:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:58,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:25:58,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 01:25:58,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:25:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 01:25:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:25:58,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:59,682 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 01:25:59,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 01:25:59,692 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:25:59,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:25:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:25:59,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:59,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869246142] [2021-11-07 01:25:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869246142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:59,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558116446] [2021-11-07 01:25:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:59,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:59,800 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:59,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:26:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 01:26:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:01,662 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-07 01:26:01,662 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-07 01:26:07,971 WARN L207 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-07 01:26:07,972 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-07 01:26:07,972 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-07 01:28:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:28:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:28:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [558116446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:38,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:38,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 10] imperfect sequences [12, 11] total 38 [2021-11-07 01:28:38,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437372872] [2021-11-07 01:28:38,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:28:38,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:28:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:28:38,888 INFO L87 Difference]: Start difference. First operand 233 states and 289 transitions. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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 01:29:08,482 WARN L207 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-11-07 01:29:18,331 WARN L207 SmtUtils]: Spent 8.86 s on a formula simplification. DAG size of input: 114 DAG size of output: 103 [2021-11-07 01:29:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:57,177 INFO L93 Difference]: Finished difference Result 710 states and 895 transitions. [2021-11-07 01:29:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 01:29:57,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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 82 [2021-11-07 01:29:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:57,182 INFO L225 Difference]: With dead ends: 710 [2021-11-07 01:29:57,182 INFO L226 Difference]: Without dead ends: 530 [2021-11-07 01:29:57,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=610, Invalid=3421, Unknown=1, NotChecked=0, Total=4032 [2021-11-07 01:29:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-07 01:29:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 290. [2021-11-07 01:29:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 280 states have (on average 1.275) internal successors, (357), 289 states have internal predecessors, (357), 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 01:29:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 357 transitions. [2021-11-07 01:29:57,218 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 357 transitions. Word has length 82 [2021-11-07 01:29:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:57,218 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 357 transitions. [2021-11-07 01:29:57,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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 01:29:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 357 transitions. [2021-11-07 01:29:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:29:57,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:57,220 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:57,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:57,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:57,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:57,637 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:29:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash 433222768, now seen corresponding path program 1 times [2021-11-07 01:29:57,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:57,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657029820] [2021-11-07 01:29:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:57,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:57,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:57,639 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:57,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:29:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:29:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:59,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2021-11-07 01:29:59,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:59,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-07 01:29:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:29:59,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:00,913 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 01:30:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 01:30:00,926 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:30:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:30:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:01,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:01,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657029820] [2021-11-07 01:30:01,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657029820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:01,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [414685962] [2021-11-07 01:30:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:01,013 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:01,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:01,014 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:01,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:30:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:30:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:02,860 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 01:30:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-07 01:30:12,041 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-07 01:30:12,042 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 54 treesize of output 45 [2021-11-07 01:30:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:12,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:13,801 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 165 treesize of output 157 [2021-11-07 01:30:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:14,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [414685962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:14,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525752685] [2021-11-07 01:30:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:14,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:14,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:14,038 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:14,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 01:30:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:30:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:17,171 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 41 treesize of output 29 [2021-11-07 01:30:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:17,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:17,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:17,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 20 [2021-11-07 01:30:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:18,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525752685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:18,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:30:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14, 14, 13, 13] total 52 [2021-11-07 01:30:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078583605] [2021-11-07 01:30:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 01:30:18,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 01:30:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:30:18,031 INFO L87 Difference]: Start difference. First operand 290 states and 357 transitions. Second operand has 52 states, 52 states have (on average 6.403846153846154) internal successors, (333), 52 states have internal predecessors, (333), 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 01:32:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:00,099 INFO L93 Difference]: Finished difference Result 1063 states and 1286 transitions. [2021-11-07 01:32:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 01:32:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.403846153846154) internal successors, (333), 52 states have internal predecessors, (333), 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 82 [2021-11-07 01:32:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:00,104 INFO L225 Difference]: With dead ends: 1063 [2021-11-07 01:32:00,104 INFO L226 Difference]: Without dead ends: 827 [2021-11-07 01:32:00,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 435 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=1623, Invalid=10147, Unknown=2, NotChecked=0, Total=11772 [2021-11-07 01:32:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-07 01:32:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 318. [2021-11-07 01:32:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 308 states have (on average 1.2629870129870129) internal successors, (389), 317 states have internal predecessors, (389), 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 01:32:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 389 transitions. [2021-11-07 01:32:00,166 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 389 transitions. Word has length 82 [2021-11-07 01:32:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:00,166 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 389 transitions. [2021-11-07 01:32:00,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.403846153846154) internal successors, (333), 52 states have internal predecessors, (333), 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 01:32:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 389 transitions. [2021-11-07 01:32:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:32:00,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:00,168 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:00,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:00,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:00,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:00,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:00,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1712055758, now seen corresponding path program 1 times [2021-11-07 01:32:00,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:00,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923708504] [2021-11-07 01:32:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:00,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:00,775 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:00,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:32:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:02,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:32:02,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:32:02,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923708504] [2021-11-07 01:32:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923708504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:02,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:02,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:32:02,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303628979] [2021-11-07 01:32:02,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:02,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:02,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:02,704 INFO L87 Difference]: Start difference. First operand 318 states and 389 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 01:32:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:03,014 INFO L93 Difference]: Finished difference Result 693 states and 850 transitions. [2021-11-07 01:32:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 98 [2021-11-07 01:32:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:03,018 INFO L225 Difference]: With dead ends: 693 [2021-11-07 01:32:03,018 INFO L226 Difference]: Without dead ends: 427 [2021-11-07 01:32:03,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 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 01:32:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-07 01:32:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 316. [2021-11-07 01:32:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 306 states have (on average 1.238562091503268) internal successors, (379), 315 states have internal predecessors, (379), 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 01:32:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 379 transitions. [2021-11-07 01:32:03,096 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 379 transitions. Word has length 98 [2021-11-07 01:32:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:03,096 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 379 transitions. [2021-11-07 01:32:03,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 01:32:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 379 transitions. [2021-11-07 01:32:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:32:03,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:03,098 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:03,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:03,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:03,312 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash -249518900, now seen corresponding path program 2 times [2021-11-07 01:32:03,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:03,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115193367] [2021-11-07 01:32:03,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:32:03,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:03,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:03,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:32:04,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:32:04,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:32:04,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:32:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:05,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-07 01:32:05,993 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 27 treesize of output 19 [2021-11-07 01:32:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:06,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:06,922 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-07 01:32:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-07 01:32:06,931 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:32:06,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-07 01:32:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:06,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:06,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115193367] [2021-11-07 01:32:06,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115193367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:06,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:06,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-07 01:32:06,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320865538] [2021-11-07 01:32:06,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:32:06,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:32:06,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:32:06,984 INFO L87 Difference]: Start difference. First operand 316 states and 379 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:10,745 INFO L93 Difference]: Finished difference Result 978 states and 1189 transitions. [2021-11-07 01:32:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:32:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 01:32:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:10,751 INFO L225 Difference]: With dead ends: 978 [2021-11-07 01:32:10,751 INFO L226 Difference]: Without dead ends: 748 [2021-11-07 01:32:10,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:32:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-07 01:32:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 454. [2021-11-07 01:32:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 444 states have (on average 1.204954954954955) internal successors, (535), 453 states have internal predecessors, (535), 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 01:32:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 535 transitions. [2021-11-07 01:32:10,841 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 535 transitions. Word has length 98 [2021-11-07 01:32:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:10,842 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 535 transitions. [2021-11-07 01:32:10,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 535 transitions. [2021-11-07 01:32:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:32:10,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:10,844 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:10,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:11,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:11,065 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash 451545678, now seen corresponding path program 1 times [2021-11-07 01:32:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:11,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320598283] [2021-11-07 01:32:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:11,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:11,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:11,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:32:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:12,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:32:12,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:13,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:13,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:13,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320598283] [2021-11-07 01:32:13,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320598283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:13,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:13,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:32:13,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109828107] [2021-11-07 01:32:13,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:13,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:13,431 INFO L87 Difference]: Start difference. First operand 454 states and 535 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 01:32:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:13,659 INFO L93 Difference]: Finished difference Result 610 states and 730 transitions. [2021-11-07 01:32:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:32:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 98 [2021-11-07 01:32:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:13,663 INFO L225 Difference]: With dead ends: 610 [2021-11-07 01:32:13,663 INFO L226 Difference]: Without dead ends: 454 [2021-11-07 01:32:13,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:32:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-07 01:32:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-11-07 01:32:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 444 states have (on average 1.195945945945946) internal successors, (531), 453 states have internal predecessors, (531), 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 01:32:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 531 transitions. [2021-11-07 01:32:13,732 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 531 transitions. Word has length 98 [2021-11-07 01:32:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 531 transitions. [2021-11-07 01:32:13,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 01:32:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 531 transitions. [2021-11-07 01:32:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:32:13,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:13,735 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:13,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:13,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:13,957 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1288053128, now seen corresponding path program 1 times [2021-11-07 01:32:13,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:13,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383402238] [2021-11-07 01:32:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:13,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:13,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:13,959 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:13,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:32:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:15,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:15,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:15,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383402238] [2021-11-07 01:32:15,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383402238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:15,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:15,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:32:15,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292196002] [2021-11-07 01:32:15,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:15,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:15,904 INFO L87 Difference]: Start difference. First operand 454 states and 531 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 01:32:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:16,095 INFO L93 Difference]: Finished difference Result 650 states and 774 transitions. [2021-11-07 01:32:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:32:16,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 98 [2021-11-07 01:32:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:16,097 INFO L225 Difference]: With dead ends: 650 [2021-11-07 01:32:16,097 INFO L226 Difference]: Without dead ends: 322 [2021-11-07 01:32:16,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 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 01:32:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-07 01:32:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2021-11-07 01:32:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 308 states have (on average 1.198051948051948) internal successors, (369), 317 states have internal predecessors, (369), 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 01:32:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 369 transitions. [2021-11-07 01:32:16,153 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 369 transitions. Word has length 98 [2021-11-07 01:32:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:16,154 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 369 transitions. [2021-11-07 01:32:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 01:32:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 369 transitions. [2021-11-07 01:32:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:32:16,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:16,156 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:16,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:16,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:16,372 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash 589514762, now seen corresponding path program 1 times [2021-11-07 01:32:16,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:16,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243940171] [2021-11-07 01:32:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:16,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:16,374 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:16,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:32:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:18,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:18,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:18,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243940171] [2021-11-07 01:32:18,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243940171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:18,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:18,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:32:18,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598787869] [2021-11-07 01:32:18,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:18,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:18,416 INFO L87 Difference]: Start difference. First operand 318 states and 369 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 01:32:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:18,595 INFO L93 Difference]: Finished difference Result 483 states and 570 transitions. [2021-11-07 01:32:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:32:18,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 98 [2021-11-07 01:32:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:18,597 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:32:18,598 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 01:32:18,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 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 01:32:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 01:32:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2021-11-07 01:32:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 238 states have (on average 1.2142857142857142) internal successors, (289), 247 states have internal predecessors, (289), 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 01:32:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 289 transitions. [2021-11-07 01:32:18,634 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 289 transitions. Word has length 98 [2021-11-07 01:32:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:18,635 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 289 transitions. [2021-11-07 01:32:18,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 01:32:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 289 transitions. [2021-11-07 01:32:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:32:18,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:18,636 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:18,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:18,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:18,836 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash 451536171, now seen corresponding path program 1 times [2021-11-07 01:32:18,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:18,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905640119] [2021-11-07 01:32:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:18,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:18,838 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:18,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:32:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:32:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:21,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:32:21,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:21,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905640119] [2021-11-07 01:32:21,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905640119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:21,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:21,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-07 01:32:21,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659778651] [2021-11-07 01:32:21,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:32:21,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:21,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:32:21,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:32:21,573 INFO L87 Difference]: Start difference. First operand 248 states and 289 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 01:32:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:21,910 INFO L93 Difference]: Finished difference Result 388 states and 458 transitions. [2021-11-07 01:32:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:32:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 100 [2021-11-07 01:32:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:21,912 INFO L225 Difference]: With dead ends: 388 [2021-11-07 01:32:21,912 INFO L226 Difference]: Without dead ends: 248 [2021-11-07 01:32:21,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:32:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-07 01:32:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-11-07 01:32:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 238 states have (on average 1.2100840336134453) internal successors, (288), 247 states have internal predecessors, (288), 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 01:32:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2021-11-07 01:32:21,952 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 100 [2021-11-07 01:32:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:21,953 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2021-11-07 01:32:21,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 01:32:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2021-11-07 01:32:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:32:21,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:21,954 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:21,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:22,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,172 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:32:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash -254662275, now seen corresponding path program 1 times [2021-11-07 01:32:22,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:22,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874498196] [2021-11-07 01:32:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:22,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:22,174 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:22,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:32:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 01:32:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:32:26,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:33,945 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-07 01:32:33,946 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-07 01:32:34,487 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-07 01:32:34,488 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-07 01:32:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:32:38,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:38,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874498196] [2021-11-07 01:32:38,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874498196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:38,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460754500] [2021-11-07 01:32:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:38,973 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:38,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:38,974 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:38,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0b4da11-a6a3-4c59-b201-c7644b8c7b86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:32:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 01:32:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:42,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-07 01:32:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-07 01:32:46,349 INFO L354 Elim1Store]: treesize reduction 101, result has 2.9 percent of original size [2021-11-07 01:32:46,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 81 [2021-11-07 01:32:46,430 INFO L354 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2021-11-07 01:32:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 42 [2021-11-07 01:32:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:32:46,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:18,398 WARN L207 SmtUtils]: Spent 26.13 s on a formula simplification. DAG size of input: 234 DAG size of output: 162 [2021-11-07 01:33:18,399 INFO L354 Elim1Store]: treesize reduction 1704, result has 47.1 percent of original size [2021-11-07 01:33:18,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 37 case distinctions, treesize of input 19553 treesize of output 17903