./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur --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 df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:22:01,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:22:01,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:22:01,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:22:01,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:22:01,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:22:01,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:22:01,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:22:01,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:22:01,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:22:01,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:22:01,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:22:01,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:22:01,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:22:01,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:22:01,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:22:01,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:22:01,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:22:01,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:22:01,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:22:01,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:22:01,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:22:01,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:22:01,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:22:01,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:22:01,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:22:01,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:22:01,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:22:01,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:22:01,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:22:01,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:22:01,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:22:01,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:22:01,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:22:01,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:22:01,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:22:01,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:22:01,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:22:01,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:22:01,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:22:01,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:22:01,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:22:01,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:22:01,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:22:01,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:22:01,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:22:01,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:22:01,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:22:01,554 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:22:01,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:22:01,555 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:22:01,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:22:01,556 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:22:01,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:22:01,557 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:22:01,557 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:22:01,557 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:22:01,557 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:22:01,558 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:22:01,558 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:22:01,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:22:01,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:22:01,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:22:01,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:22:01,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:22:01,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:22:01,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:22:01,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:22:01,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:22:01,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:22:01,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:22:01,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:01,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:22:01,563 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:22:01,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:22:01,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:22:01,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:22:01,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:22:01,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:22:01,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:22:01,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 [2022-11-26 00:22:01,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:22:01,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:22:01,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:22:01,895 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:22:01,896 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:22:01,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2022-11-26 00:22:04,965 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:22:05,661 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:22:05,661 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2022-11-26 00:22:05,702 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/data/dd823fd18/3c6731945c2746318af87746541e98d3/FLAGb5c334b97 [2022-11-26 00:22:05,721 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/data/dd823fd18/3c6731945c2746318af87746541e98d3 [2022-11-26 00:22:05,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:22:05,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:22:05,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:05,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:22:05,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:22:05,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:05" (1/1) ... [2022-11-26 00:22:05,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e006ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:05, skipping insertion in model container [2022-11-26 00:22:05,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:22:05" (1/1) ... [2022-11-26 00:22:05,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:22:05,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:22:06,203 WARN L237 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_ba164080-c75a-4171-87cd-6b8bd168eacc/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2022-11-26 00:22:06,216 WARN L237 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_ba164080-c75a-4171-87cd-6b8bd168eacc/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2022-11-26 00:22:07,667 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,670 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,673 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,675 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,678 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,702 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,719 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,720 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:07,843 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:22:07,843 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:22:07,844 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:22:07,850 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:22:07,852 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:22:07,853 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:22:08,267 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:22:08,269 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:22:08,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:22:08,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:22:08,273 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:22:08,275 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:22:08,276 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:22:08,276 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:22:08,277 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:22:08,278 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:22:08,279 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:22:08,536 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:22:08,601 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-26 00:22:08,627 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:22:08,705 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:22:08,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,762 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,871 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-26 00:22:08,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:08,924 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:22:08,938 WARN L237 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_ba164080-c75a-4171-87cd-6b8bd168eacc/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2022-11-26 00:22:08,939 WARN L237 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_ba164080-c75a-4171-87cd-6b8bd168eacc/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2022-11-26 00:22:08,973 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,974 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,974 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,975 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,975 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,982 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,983 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,984 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,985 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:08,996 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:22:08,997 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:22:08,998 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:22:09,001 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:22:09,006 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:22:09,006 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:22:09,051 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:22:09,051 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:22:09,052 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:22:09,053 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:22:09,054 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:22:09,055 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:22:09,056 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:22:09,056 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:22:09,057 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:22:09,058 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:22:09,061 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:22:09,103 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:22:09,146 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-26 00:22:09,159 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:22:09,181 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:22:09,197 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:09,198 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:22:09,237 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-26 00:22:09,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:22:09,523 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:22:09,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09 WrapperNode [2022-11-26 00:22:09,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:22:09,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:09,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:22:09,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:22:09,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,717 INFO L138 Inliner]: procedures = 690, calls = 2619, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 799 [2022-11-26 00:22:09,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:22:09,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:22:09,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:22:09,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:22:09,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:22:09,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:22:09,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:22:09,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:22:09,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (1/1) ... [2022-11-26 00:22:09,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:22:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:09,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:22:09,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:22:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-26 00:22:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-26 00:22:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:22:09,900 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-26 00:22:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-26 00:22:09,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:22:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:22:09,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:22:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2022-11-26 00:22:09,902 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2022-11-26 00:22:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:22:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:22:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:22:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:22:09,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:22:09,903 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-26 00:22:09,904 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-26 00:22:09,904 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-26 00:22:09,904 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-26 00:22:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:22:09,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:22:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:22:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:22:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:22:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-11-26 00:22:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-11-26 00:22:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:22:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:22:10,217 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:22:10,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:22:11,690 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:22:11,975 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:22:11,976 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:22:11,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:11 BoogieIcfgContainer [2022-11-26 00:22:11,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:22:11,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:22:11,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:22:11,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:22:11,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:22:05" (1/3) ... [2022-11-26 00:22:11,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1c6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:11, skipping insertion in model container [2022-11-26 00:22:11,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:22:09" (2/3) ... [2022-11-26 00:22:11,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1c6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:22:11, skipping insertion in model container [2022-11-26 00:22:11,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:22:11" (3/3) ... [2022-11-26 00:22:11,998 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_left_trim_pred_harness.i [2022-11-26 00:22:12,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:22:12,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:22:12,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:22:12,109 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6b5a8ab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:22:12,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:22:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-26 00:22:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:22:12,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:12,132 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:22:12,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1706243424, now seen corresponding path program 1 times [2022-11-26 00:22:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:12,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89496460] [2022-11-26 00:22:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:22:12,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:12,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89496460] [2022-11-26 00:22:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89496460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:12,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:12,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:22:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842211821] [2022-11-26 00:22:12,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:12,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:22:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:22:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:22:13,021 INFO L87 Difference]: Start difference. First operand has 70 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:22:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:13,397 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-11-26 00:22:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:22:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40 [2022-11-26 00:22:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:13,412 INFO L225 Difference]: With dead ends: 103 [2022-11-26 00:22:13,412 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 00:22:13,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:22:13,427 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:13,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:22:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 00:22:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-26 00:22:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-26 00:22:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-26 00:22:13,528 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2022-11-26 00:22:13,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:13,543 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-26 00:22:13,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:22:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-26 00:22:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:22:13,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:13,546 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:22:13,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:22:13,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 348988715, now seen corresponding path program 1 times [2022-11-26 00:22:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905399383] [2022-11-26 00:22:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:22:17,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:17,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905399383] [2022-11-26 00:22:17,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905399383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:17,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:17,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-26 00:22:17,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19655654] [2022-11-26 00:22:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:22:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:22:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:22:17,285 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:22:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:19,713 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-11-26 00:22:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:22:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-11-26 00:22:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:19,717 INFO L225 Difference]: With dead ends: 89 [2022-11-26 00:22:19,717 INFO L226 Difference]: Without dead ends: 87 [2022-11-26 00:22:19,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:22:19,719 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 51 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:19,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 453 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-26 00:22:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-26 00:22:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-11-26 00:22:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-26 00:22:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-11-26 00:22:19,737 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 42 [2022-11-26 00:22:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:19,738 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-11-26 00:22:19,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:22:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-11-26 00:22:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:22:19,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:19,740 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:22:19,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:22:19,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1396918630, now seen corresponding path program 1 times [2022-11-26 00:22:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589963005] [2022-11-26 00:22:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:22:26,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:26,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589963005] [2022-11-26 00:22:26,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589963005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:26,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030807883] [2022-11-26 00:22:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:26,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:26,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:26,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:26,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba164080-c75a-4171-87cd-6b8bd168eacc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:22:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:27,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-26 00:22:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:27,774 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-26 00:22:27,782 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-26 00:22:29,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-11-26 00:22:29,666 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 22 [2022-11-26 00:22:31,049 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:22:31,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2022-11-26 00:22:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:22:31,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:33,057 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2022-11-26 00:22:48,208 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.