./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- [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-e04fb08 [2022-11-16 20:20:37,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:20:37,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:20:37,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:20:37,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:20:37,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:20:37,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:20:37,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:20:37,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:20:37,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:20:37,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:20:37,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:20:37,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:20:37,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:20:37,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:20:37,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:20:37,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:20:37,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:20:37,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:20:37,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:20:37,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:20:37,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:20:37,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:20:37,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:20:37,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:20:37,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:20:37,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:20:37,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:20:37,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:20:37,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:20:37,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:20:37,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:20:37,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:20:37,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:20:37,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:20:37,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:20:37,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:20:37,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:20:37,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:20:37,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:20:37,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:20:37,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 20:20:37,916 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:20:37,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:20:37,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:20:37,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:20:37,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:20:37,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:20:37,918 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:20:37,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:20:37,919 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:20:37,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:20:37,919 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:20:37,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:20:37,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:20:37,920 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:20:37,920 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:20:37,921 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:20:37,921 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:20:37,921 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:20:37,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:20:37,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:20:37,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:20:37,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:20:37,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:20:37,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:20:37,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:20:37,925 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:20:37,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:20:37,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:20:37,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:20:37,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:20:37,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:20:37,927 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:20:37,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:20:37,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:20:37,928 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:20:37,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:20:37,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:20:37,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:20:37,928 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_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2022-11-16 20:20:38,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:20:38,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:20:38,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:20:38,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:20:38,199 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:20:38,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2022-11-16 20:20:38,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/data/983d6f4b7/637832e4a34a47e890626b1595b3c9ac/FLAG6f7d414c2 [2022-11-16 20:20:39,164 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:20:39,164 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2022-11-16 20:20:39,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/data/983d6f4b7/637832e4a34a47e890626b1595b3c9ac/FLAG6f7d414c2 [2022-11-16 20:20:39,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/data/983d6f4b7/637832e4a34a47e890626b1595b3c9ac [2022-11-16 20:20:39,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:20:39,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:20:39,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:20:39,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:20:39,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:20:39,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:20:39" (1/1) ... [2022-11-16 20:20:39,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662e26a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:39, skipping insertion in model container [2022-11-16 20:20:39,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:20:39" (1/1) ... [2022-11-16 20:20:39,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:20:39,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:20:39,684 WARN L229 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_063e8d93-c4cc-4097-9a22-9c9dbe206e65/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2022-11-16 20:20:39,690 WARN L229 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_063e8d93-c4cc-4097-9a22-9c9dbe206e65/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2022-11-16 20:20:40,568 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,569 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,571 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,572 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,574 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,597 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,611 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,625 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,625 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,627 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,628 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,629 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,630 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:40,947 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 20:20:40,948 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 20:20:40,949 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 20:20:40,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 20:20:40,952 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 20:20:40,952 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 20:20:40,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 20:20:40,954 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 20:20:40,954 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 20:20:40,955 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 20:20:41,094 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 20:20:41,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:20:41,131 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:20:41,144 WARN L229 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_063e8d93-c4cc-4097-9a22-9c9dbe206e65/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2022-11-16 20:20:41,145 WARN L229 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_063e8d93-c4cc-4097-9a22-9c9dbe206e65/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2022-11-16 20:20:41,249 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,250 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,250 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,251 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,252 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,273 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,274 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,275 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,275 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,276 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,277 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,278 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,278 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:20:41,362 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 20:20:41,363 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 20:20:41,364 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 20:20:41,365 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 20:20:41,365 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 20:20:41,366 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 20:20:41,366 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 20:20:41,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 20:20:41,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 20:20:41,368 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 20:20:41,389 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 20:20:41,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:20:41,568 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:20:41,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41 WrapperNode [2022-11-16 20:20:41,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:20:41,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:20:41,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:20:41,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:20:41,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,734 INFO L138 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2022-11-16 20:20:41,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:20:41,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:20:41,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:20:41,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:20:41,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,810 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:20:41,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:20:41,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:20:41,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:20:41,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (1/1) ... [2022-11-16 20:20:41,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:20:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:41,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:20:41,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:20:41,920 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-16 20:20:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-16 20:20:41,921 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-11-16 20:20:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-11-16 20:20:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:20:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:20:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 20:20:41,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 20:20:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-16 20:20:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-16 20:20:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:20:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-16 20:20:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-16 20:20:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:20:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:20:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:20:41,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:20:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-16 20:20:41,927 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-16 20:20:41,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 20:20:41,927 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 20:20:41,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:20:41,928 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:20:41,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:20:41,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:20:41,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 20:20:41,929 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-16 20:20:41,929 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-16 20:20:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-16 20:20:41,930 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-16 20:20:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:20:42,255 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:20:42,257 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:20:42,646 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:20:42,780 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:20:42,780 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 20:20:42,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:20:42 BoogieIcfgContainer [2022-11-16 20:20:42,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:20:42,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:20:42,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:20:42,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:20:42,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:20:39" (1/3) ... [2022-11-16 20:20:42,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2725810f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:20:42, skipping insertion in model container [2022-11-16 20:20:42,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:41" (2/3) ... [2022-11-16 20:20:42,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2725810f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:20:42, skipping insertion in model container [2022-11-16 20:20:42,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:20:42" (3/3) ... [2022-11-16 20:20:42,793 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2022-11-16 20:20:42,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:20:42,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:20:42,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:20:42,867 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;@2cba0220, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:20:42,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:20:42,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-16 20:20:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 20:20:42,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:42,882 INFO L195 NwaCegarLoop]: trace histogram [9, 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] [2022-11-16 20:20:42,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 900379934, now seen corresponding path program 1 times [2022-11-16 20:20:42,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:42,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556902470] [2022-11-16 20:20:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:42,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 20:20:43,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:43,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556902470] [2022-11-16 20:20:43,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556902470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:20:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934280202] [2022-11-16 20:20:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:43,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:43,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:43,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:20:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 20:20:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:44,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 20:20:44,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 20:20:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:44,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:44,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:44,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-16 20:20:44,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:44,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:44,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-16 20:20:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 20:20:47,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:20:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934280202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:20:47,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:20:47,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-16 20:20:47,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247850439] [2022-11-16 20:20:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:20:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 20:20:47,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 20:20:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:20:47,395 INFO L87 Difference]: Start difference. First operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 20:20:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:48,206 INFO L93 Difference]: Finished difference Result 247 states and 376 transitions. [2022-11-16 20:20:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:20:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 70 [2022-11-16 20:20:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:48,218 INFO L225 Difference]: With dead ends: 247 [2022-11-16 20:20:48,219 INFO L226 Difference]: Without dead ends: 163 [2022-11-16 20:20:48,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:20:48,236 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 28 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:48,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 757 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 102 Unchecked, 0.5s Time] [2022-11-16 20:20:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-16 20:20:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2022-11-16 20:20:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 61 states have internal predecessors, (71), 45 states have call successors, (45), 13 states have call predecessors, (45), 13 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-16 20:20:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2022-11-16 20:20:48,306 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 70 [2022-11-16 20:20:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:48,306 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2022-11-16 20:20:48,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-16 20:20:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2022-11-16 20:20:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 20:20:48,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:48,310 INFO L195 NwaCegarLoop]: trace histogram [9, 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] [2022-11-16 20:20:48,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:48,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 20:20:48,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 134050646, now seen corresponding path program 1 times [2022-11-16 20:20:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:48,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445301245] [2022-11-16 20:20:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-16 20:20:48,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445301245] [2022-11-16 20:20:48,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445301245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:20:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885060012] [2022-11-16 20:20:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:48,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:48,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:48,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_063e8d93-c4cc-4097-9a22-9c9dbe206e65/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:20:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-16 20:20:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:49,184 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:20:49,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 20:20:49,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 20:20:49,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-16 20:20:49,477 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 20:20:49,478 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 20:20:49,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-16 20:20:49,511 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:20:49,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 20:20:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,528 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-16 20:20:49,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-16 20:20:49,667 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-16 20:20:49,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 158 [2022-11-16 20:20:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:49,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 138 [2022-11-16 20:20:49,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 49 [2022-11-16 20:20:49,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 20:22:48,834 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification that was a NOOP. DAG size: 476 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:23:14,319 WARN L233 SmtUtils]: Spent 9.64s on a formula simplification that was a NOOP. DAG size: 520 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:24:13,659 WARN L233 SmtUtils]: Spent 28.50s on a formula simplification that was a NOOP. DAG size: 548 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:25:06,847 WARN L233 SmtUtils]: Spent 36.43s on a formula simplification that was a NOOP. DAG size: 612 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:26:23,409 WARN L233 SmtUtils]: Spent 38.36s on a formula simplification that was a NOOP. DAG size: 692 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:27:22,989 WARN L233 SmtUtils]: Spent 38.60s on a formula simplification that was a NOOP. DAG size: 749 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:28:21,826 WARN L233 SmtUtils]: Spent 38.44s on a formula simplification that was a NOOP. DAG size: 725 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:28:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 18 proven. 17 refuted. 62 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:32,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:32,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 457 [2022-11-16 20:28:35,263 INFO L321 Elim1Store]: treesize reduction 332, result has 31.3 percent of original size [2022-11-16 20:28:35,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 7 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 31 case distinctions, treesize of input 353 treesize of output 943 [2022-11-16 20:28:42,104 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-16 20:28:42,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 13 [2022-11-16 20:28:42,331 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-11-16 20:28:42,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 19 [2022-11-16 20:28:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:42,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 41 treesize of output 13 [2022-11-16 20:28:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:42,556 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 6 [2022-11-16 20:28:42,842 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 6 [2022-11-16 20:28:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:42,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 41 treesize of output 13 [2022-11-16 20:28:54,616 WARN L233 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 281 DAG size of output: 143 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 20:28:54,618 INFO L321 Elim1Store]: treesize reduction 642, result has 32.3 percent of original size [2022-11-16 20:28:54,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 12 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 14 new quantified variables, introduced 57 case distinctions, treesize of input 2820 treesize of output 3415