./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P --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 4e3d62ab3962e5958dc41169c7885079de47f5dcf75079068205793f151a2e2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:48:16,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:48:16,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:48:16,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:48:16,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:48:16,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:48:16,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:48:16,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:48:16,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:48:16,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:48:16,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:48:16,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:48:16,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:48:16,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:48:16,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:48:16,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:48:16,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:48:16,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:48:16,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:48:16,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:48:16,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:48:16,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:48:16,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:48:16,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:48:16,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:48:16,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:48:16,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:48:16,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:48:16,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:48:16,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:48:16,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:48:16,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:48:16,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:48:16,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:48:16,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:48:16,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:48:16,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:48:16,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:48:16,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:48:16,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:48:16,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:48:16,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:48:16,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:48:16,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:48:16,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:48:16,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:48:16,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:48:16,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:48:16,532 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:48:16,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:48:16,533 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:48:16,533 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:48:16,534 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:48:16,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:48:16,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:48:16,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:48:16,535 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:48:16,536 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:48:16,536 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:48:16,536 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:48:16,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:48:16,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:48:16,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:48:16,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:48:16,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:48:16,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:48:16,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:48:16,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:48:16,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:48:16,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:48:16,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:48:16,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:16,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:48:16,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:48:16,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:48:16,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:48:16,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:48:16,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:48:16,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:48:16,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:48:16,544 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_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e3d62ab3962e5958dc41169c7885079de47f5dcf75079068205793f151a2e2b [2021-11-21 01:48:16,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:48:16,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:48:16,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:48:16,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:48:16,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:48:16,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i [2021-11-21 01:48:16,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/data/6900ae981/e6752df6ce5a4f13a89a6aff75869494/FLAG0ff2b90d1 [2021-11-21 01:48:17,877 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:48:17,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i [2021-11-21 01:48:17,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/data/6900ae981/e6752df6ce5a4f13a89a6aff75869494/FLAG0ff2b90d1 [2021-11-21 01:48:17,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/data/6900ae981/e6752df6ce5a4f13a89a6aff75869494 [2021-11-21 01:48:17,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:48:17,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:48:17,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:17,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:48:17,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:48:17,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:17" (1/1) ... [2021-11-21 01:48:17,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df34782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:17, skipping insertion in model container [2021-11-21 01:48:17,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:17" (1/1) ... [2021-11-21 01:48:17,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:48:18,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:48:18,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4497,4510] [2021-11-21 01:48:18,497 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4557,4570] [2021-11-21 01:48:19,369 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:48:19,464 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,465 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,466 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,467 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,485 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,486 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,489 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,490 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,492 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,493 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,494 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,495 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:19,928 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:48:19,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:48:19,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:48:19,933 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:48:19,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:48:19,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:48:19,936 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:48:19,937 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:48:19,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:48:19,939 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:48:20,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:20,245 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:48:20,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4497,4510] [2021-11-21 01:48:20,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4557,4570] [2021-11-21 01:48:20,323 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:48:20,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,352 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,358 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,374 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,375 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,377 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,383 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,388 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,464 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:48:20,465 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:48:20,467 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:48:20,468 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:48:20,470 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:48:20,471 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:48:20,472 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:48:20,472 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:48:20,476 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:48:20,478 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:48:20,601 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,626 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:48:20,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:20,994 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:48:20,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20 WrapperNode [2021-11-21 01:48:20,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:20,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:48:20,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:48:20,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:48:21,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,196 INFO L137 Inliner]: procedures = 691, calls = 1700, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 616 [2021-11-21 01:48:21,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:48:21,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:48:21,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:48:21,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:48:21,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:48:21,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:48:21,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:48:21,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:48:21,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (1/1) ... [2021-11-21 01:48:21,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:21,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:21,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:48:21,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:48:21,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:48:21,413 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-21 01:48:21,413 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-21 01:48:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-21 01:48:21,414 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-21 01:48:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:48:21,414 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:48:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:48:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 01:48:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 01:48:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:48:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:48:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:48:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:48:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:48:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:48:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:48:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:48:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:48:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-21 01:48:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-21 01:48:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-21 01:48:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-21 01:48:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-11-21 01:48:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-11-21 01:48:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:48:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:48:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_pop_back [2021-11-21 01:48:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_pop_back [2021-11-21 01:48:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:48:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:48:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:48:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 01:48:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 01:48:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-21 01:48:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-21 01:48:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:48:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-21 01:48:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-21 01:48:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-21 01:48:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-21 01:48:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-21 01:48:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-21 01:48:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:48:21,852 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:48:21,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:48:22,998 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:48:23,167 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:48:23,168 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:48:23,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:48:23 BoogieIcfgContainer [2021-11-21 01:48:23,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:48:23,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:48:23,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:48:23,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:48:23,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:48:17" (1/3) ... [2021-11-21 01:48:23,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d913195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:48:23, skipping insertion in model container [2021-11-21 01:48:23,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:20" (2/3) ... [2021-11-21 01:48:23,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d913195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:48:23, skipping insertion in model container [2021-11-21 01:48:23,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:48:23" (3/3) ... [2021-11-21 01:48:23,186 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_pop_back_harness.i [2021-11-21 01:48:23,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:48:23,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:48:23,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:48:23,291 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 [2021-11-21 01:48:23,292 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:48:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-21 01:48:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 01:48:23,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:23,335 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:23,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash 469076981, now seen corresponding path program 1 times [2021-11-21 01:48:23,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234892225] [2021-11-21 01:48:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:23,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-21 01:48:24,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234892225] [2021-11-21 01:48:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234892225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:48:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688591822] [2021-11-21 01:48:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:24,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:24,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:24,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:24,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:48:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:48:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 01:48:25,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:48:25,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688591822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:25,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:48:25,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:48:25,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770172492] [2021-11-21 01:48:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:25,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:48:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:48:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:48:25,241 INFO L87 Difference]: Start difference. First operand has 142 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 01:48:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:26,545 INFO L93 Difference]: Finished difference Result 255 states and 361 transitions. [2021-11-21 01:48:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:48:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 67 [2021-11-21 01:48:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:26,566 INFO L225 Difference]: With dead ends: 255 [2021-11-21 01:48:26,566 INFO L226 Difference]: Without dead ends: 142 [2021-11-21 01:48:26,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:48:26,581 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 29 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:26,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 546 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 01:48:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-21 01:48:26,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-21 01:48:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (52), 47 states have call predecessors, (52), 47 states have call successors, (52) [2021-11-21 01:48:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2021-11-21 01:48:26,688 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 67 [2021-11-21 01:48:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:26,689 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2021-11-21 01:48:26,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 01:48:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2021-11-21 01:48:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:48:26,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:26,698 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:26,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:26,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:48:26,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash 941615624, now seen corresponding path program 1 times [2021-11-21 01:48:26,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246421686] [2021-11-21 01:48:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:26,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:27,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:48:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288027735] [2021-11-21 01:48:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:27,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:27,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:27,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:48:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:48:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:48:27,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:48:27,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246421686] [2021-11-21 01:48:27,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:48:27,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288027735] [2021-11-21 01:48:27,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288027735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:27,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:27,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:48:27,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577267363] [2021-11-21 01:48:27,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:27,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:48:27,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:48:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:48:27,799 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:48:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:28,867 INFO L93 Difference]: Finished difference Result 244 states and 326 transitions. [2021-11-21 01:48:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:48:28,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 76 [2021-11-21 01:48:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:28,871 INFO L225 Difference]: With dead ends: 244 [2021-11-21 01:48:28,871 INFO L226 Difference]: Without dead ends: 142 [2021-11-21 01:48:28,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:48:28,874 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 47 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:28,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 777 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:48:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-21 01:48:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-21 01:48:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (49), 47 states have call predecessors, (49), 47 states have call successors, (49) [2021-11-21 01:48:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2021-11-21 01:48:28,896 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 76 [2021-11-21 01:48:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:28,897 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2021-11-21 01:48:28,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:48:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2021-11-21 01:48:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:48:28,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:28,900 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 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] [2021-11-21 01:48:28,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:29,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:29,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1291655425, now seen corresponding path program 2 times [2021-11-21 01:48:29,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:29,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735391180] [2021-11-21 01:48:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:29,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:29,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:48:29,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017939385] [2021-11-21 01:48:29,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:48:29,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:29,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:29,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:48:29,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:48:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:48:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:48:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 01:48:30,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:48:30,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735391180] [2021-11-21 01:48:30,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:48:30,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017939385] [2021-11-21 01:48:30,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017939385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:30,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:30,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:48:30,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735770654] [2021-11-21 01:48:30,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:30,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:48:30,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:30,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:48:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:48:30,012 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:48:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:30,962 INFO L93 Difference]: Finished difference Result 242 states and 320 transitions. [2021-11-21 01:48:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:48:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2021-11-21 01:48:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:30,966 INFO L225 Difference]: With dead ends: 242 [2021-11-21 01:48:30,966 INFO L226 Difference]: Without dead ends: 142 [2021-11-21 01:48:30,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:48:30,968 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 0 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:30,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:48:30,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-21 01:48:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-21 01:48:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-21 01:48:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2021-11-21 01:48:30,989 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 85 [2021-11-21 01:48:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:30,990 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2021-11-21 01:48:30,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:48:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2021-11-21 01:48:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 01:48:30,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:30,993 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:31,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:31,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:48:31,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2046961644, now seen corresponding path program 3 times [2021-11-21 01:48:31,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:31,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706902554] [2021-11-21 01:48:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:31,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:31,280 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:48:31,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282813637] [2021-11-21 01:48:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:48:31,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:31,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:31,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:48:31,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:48:31,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:48:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:48:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:48:32,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:48:32,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706902554] [2021-11-21 01:48:32,122 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:48:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282813637] [2021-11-21 01:48:32,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282813637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:32,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:32,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:48:32,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240627638] [2021-11-21 01:48:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:32,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:48:32,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:48:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:48:32,125 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:48:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:34,178 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2021-11-21 01:48:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:48:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 94 [2021-11-21 01:48:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:34,182 INFO L225 Difference]: With dead ends: 241 [2021-11-21 01:48:34,182 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:48:34,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:48:34,185 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 51 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:34,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1033 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:48:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:48:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-21 01:48:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-21 01:48:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2021-11-21 01:48:34,203 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 94 [2021-11-21 01:48:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:34,204 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2021-11-21 01:48:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:48:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2021-11-21 01:48:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:48:34,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:34,207 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:34,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:48:34,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:34,421 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:48:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash 833723995, now seen corresponding path program 1 times [2021-11-21 01:48:34,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907932404] [2021-11-21 01:48:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:34,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:34,494 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:48:34,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362468730] [2021-11-21 01:48:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:34,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:34,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:34,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:34,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2625ba56-aec0-4028-9656-b7ab26278013/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:48:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:35,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 303 conjunts are in the unsatisfiable core [2021-11-21 01:48:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:35,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:48:36,591 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 35 [2021-11-21 01:48:36,598 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 26 [2021-11-21 01:48:36,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:36,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-21 01:48:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-21 01:48:36,913 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 9 treesize of output 3 [2021-11-21 01:48:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:42,897 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-21 01:48:42,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 68 [2021-11-21 01:48:42,971 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-21 01:48:42,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 60 [2021-11-21 01:48:44,841 INFO L354 Elim1Store]: treesize reduction 162, result has 21.0 percent of original size [2021-11-21 01:48:44,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 80 [2021-11-21 01:49:02,751 INFO L354 Elim1Store]: treesize reduction 132, result has 21.9 percent of original size [2021-11-21 01:49:02,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 131 [2021-11-21 01:49:02,978 INFO L354 Elim1Store]: treesize reduction 254, result has 9.3 percent of original size [2021-11-21 01:49:02,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 120 treesize of output 126 [2021-11-21 01:49:10,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:10,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:49:10,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:49:10,448 INFO L354 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2021-11-21 01:49:10,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 134 treesize of output 156 [2021-11-21 01:49:10,573 INFO L354 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2021-11-21 01:49:10,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 162 [2021-11-21 01:50:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 262 [2021-11-21 01:50:21,531 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 262 treesize of output 256 [2021-11-21 01:50:35,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:50:35,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 87 [2021-11-21 01:50:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 81 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:50:35,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:51,727 WARN L227 SmtUtils]: Spent 15.13s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:50:57,655 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 268] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:51:35,556 WARN L227 SmtUtils]: Spent 37.87s on a formula simplification. DAG size of input: 330 DAG size of output: 140 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:51:50,782 WARN L227 SmtUtils]: Spent 15.22s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 268] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:51:51,087 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 436 treesize of output 430 [2021-11-21 01:51:51,103 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 430 treesize of output 424 [2021-11-21 01:52:43,102 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_aws_mul_size_checked_#in~r#1.base_7| Int)) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| c_aws_array_list_length_~list.base))) (* (select .cse1 (+ c_aws_array_list_length_~list.offset 24)) (select .cse1 (+ 16 c_aws_array_list_length_~list.offset)))))) (<= (mod .cse0 18446744073709551616) (mod (select (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7|) 0 .cse0)) c_aws_array_list_length_~list.base) (+ 8 c_aws_array_list_length_~list.offset)) 18446744073709551616)))) (forall ((|v_aws_mul_size_checked_#in~r#1.base_7| Int)) (let ((.cse5 (+ c_aws_array_list_length_~list.offset 24))) (let ((.cse3 (let ((.cse6 (select |c_#memory_int| c_aws_array_list_length_~list.base))) (* (select .cse6 .cse5) (select .cse6 (+ 16 c_aws_array_list_length_~list.offset)))))) (let ((.cse4 (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7|) 0 .cse3)) c_aws_array_list_length_~list.base))) (let ((.cse2 (mod (select .cse4 (+ 8 c_aws_array_list_length_~list.offset)) 18446744073709551616))) (or (< .cse2 (mod .cse3 18446744073709551616)) (and (= 0 .cse2) (not (= (mod (select .cse4 .cse5) 18446744073709551616) 0)))))))))) is different from false [2021-11-21 01:52:43,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:43,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907932404] [2021-11-21 01:52:43,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:52:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362468730] [2021-11-21 01:52:43,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362468730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356198868] [2021-11-21 01:52:43,129 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2021-11-21 01:52:43,129 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:52:43,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:52:43,138 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:52:43,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:52:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:49,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:52:49,545 INFO L244 Elim1Store]: Index analysis took 575 ms [2021-11-21 01:53:09,988 WARN L227 SmtUtils]: Spent 20.37s on a formula simplification. DAG size of input: 1749 DAG size of output: 1163 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:53:09,992 INFO L354 Elim1Store]: treesize reduction 1948, result has 47.2 percent of original size [2021-11-21 01:53:09,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19310 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 194 case distinctions, treesize of input 992 treesize of output 2350 [2021-11-21 01:53:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:53:48,234 INFO L244 Elim1Store]: Index analysis took 1024 ms [2021-11-21 01:54:31,189 WARN L227 SmtUtils]: Spent 42.88s on a formula simplification. DAG size of input: 2139 DAG size of output: 1167 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:54:31,194 INFO L354 Elim1Store]: treesize reduction 3492, result has 33.3 percent of original size [2021-11-21 01:54:31,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 199 select indices, 199 select index equivalence classes, 19507 disjoint index pairs (out of 19701 index pairs), introduced 199 new quantified variables, introduced 388 case distinctions, treesize of input 1002 treesize of output 2369 [2021-11-21 01:54:54,764 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 192 [2021-11-21 01:54:54,887 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 192 [2021-11-21 01:54:55,690 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 192 [2021-11-21 01:54:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:58,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:54:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:54:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:54:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:54:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-21 01:54:59,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:54:59,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:54:59,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2021-11-21 01:54:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 01:55:00,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:55:00,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:55:00,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:55:00,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:55:00,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 01:55:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 01:55:00,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:00,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:55:00,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-11-21 01:55:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:00,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:55:00,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-11-21 01:55:00,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 01:55:00,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 01:55:00,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2021-11-21 01:55:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:02,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-21 01:55:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:08,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-21 01:55:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-21 01:55:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:12,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-21 01:55:12,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:12,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-21 01:55:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-21 01:55:39,007 INFO L354 Elim1Store]: treesize reduction 76, result has 44.9 percent of original size [2021-11-21 01:55:39,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 206 treesize of output 255