./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/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_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta --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-dbf71c6-m [2022-10-17 17:43:26,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:43:26,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:43:26,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:43:26,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:43:26,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:43:26,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:43:26,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:43:26,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:43:26,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:43:26,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:43:26,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:43:26,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:43:26,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:43:26,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:43:26,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:43:26,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:43:26,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:43:26,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:43:26,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:43:26,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:43:26,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:43:26,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:43:26,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:43:26,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:43:26,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:43:26,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:43:26,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:43:26,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:43:26,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:43:26,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:43:26,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:43:26,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:43:26,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:43:26,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:43:26,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:43:26,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:43:26,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:43:26,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:43:26,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:43:26,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:43:26,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:43:27,024 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:43:27,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:43:27,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:43:27,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:43:27,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:43:27,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:43:27,026 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:43:27,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:43:27,027 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:43:27,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:43:27,027 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:43:27,027 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:43:27,028 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:43:27,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:43:27,028 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:43:27,028 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:43:27,029 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:43:27,029 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:43:27,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:43:27,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:43:27,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:43:27,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:43:27,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:43:27,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:43:27,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:43:27,031 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:43:27,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:43:27,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:43:27,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:43:27,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:27,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:43:27,033 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:43:27,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:43:27,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:43:27,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:43:27,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:43:27,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:43:27,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:43:27,035 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_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2022-10-17 17:43:27,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:43:27,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:43:27,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:43:27,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:43:27,402 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:43:27,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2022-10-17 17:43:27,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/data/3228ba687/c6b313362b1f482d901eb5e9dc39db5f/FLAG26ff29408 [2022-10-17 17:43:28,450 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:43:28,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2022-10-17 17:43:28,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/data/3228ba687/c6b313362b1f482d901eb5e9dc39db5f/FLAG26ff29408 [2022-10-17 17:43:28,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/data/3228ba687/c6b313362b1f482d901eb5e9dc39db5f [2022-10-17 17:43:28,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:43:28,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:43:28,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:28,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:43:28,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:43:28,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:43:28" (1/1) ... [2022-10-17 17:43:28,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c28127e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:28, skipping insertion in model container [2022-10-17 17:43:28,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:43:28" (1/1) ... [2022-10-17 17:43:28,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:43:28,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:43:28,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2022-10-17 17:43:29,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2022-10-17 17:43:30,091 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,092 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,093 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,094 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,095 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,129 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,135 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,143 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,145 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,147 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,148 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,149 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,150 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,626 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:43:30,628 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:43:30,630 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:43:30,631 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:43:30,633 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:43:30,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:43:30,635 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:43:30,636 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:43:30,637 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:43:30,638 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:43:30,815 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:43:30,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:30,861 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:43:30,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2022-10-17 17:43:30,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2022-10-17 17:43:30,985 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,986 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,986 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,987 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,987 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,994 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,995 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,996 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,996 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,997 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:30,998 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:31,004 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:31,004 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:43:31,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:43:31,070 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:43:31,071 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:43:31,072 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:43:31,078 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:43:31,079 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:43:31,080 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:43:31,080 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:43:31,081 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:43:31,081 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:43:31,125 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:43:31,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:31,410 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:43:31,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31 WrapperNode [2022-10-17 17:43:31,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:31,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:31,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:43:31,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:43:31,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,650 INFO L138 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2022-10-17 17:43:31,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:31,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:43:31,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:43:31,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:43:31,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:43:31,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:43:31,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:43:31,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:43:31,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (1/1) ... [2022-10-17 17:43:31,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:31,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:43:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:43:31,884 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-10-17 17:43:31,884 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-10-17 17:43:31,885 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-10-17 17:43:31,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-10-17 17:43:31,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:43:31,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:43:31,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:43:31,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:43:31,887 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-10-17 17:43:31,888 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-10-17 17:43:31,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:43:31,888 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-10-17 17:43:31,888 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-10-17 17:43:31,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:43:31,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:43:31,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:43:31,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:43:31,889 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-10-17 17:43:31,889 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-10-17 17:43:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:43:31,891 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:43:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:43:31,892 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:43:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:43:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:43:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:43:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 17:43:31,893 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 17:43:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-10-17 17:43:31,893 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-10-17 17:43:31,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:43:32,282 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:43:32,284 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:43:32,815 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:43:32,995 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:43:32,995 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 17:43:33,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:32 BoogieIcfgContainer [2022-10-17 17:43:33,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:43:33,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:43:33,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:43:33,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:43:33,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:43:28" (1/3) ... [2022-10-17 17:43:33,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeea00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:33, skipping insertion in model container [2022-10-17 17:43:33,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:31" (2/3) ... [2022-10-17 17:43:33,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeea00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:33, skipping insertion in model container [2022-10-17 17:43:33,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:32" (3/3) ... [2022-10-17 17:43:33,015 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2022-10-17 17:43:33,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:43:33,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:43:33,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:43:33,105 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;@2115698a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:43:33,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:43:33,109 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) [2022-10-17 17:43:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:43:33,121 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:33,122 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] [2022-10-17 17:43:33,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash 900379934, now seen corresponding path program 1 times [2022-10-17 17:43:33,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:33,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563932877] [2022-10-17 17:43:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:33,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 17:43:34,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:34,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563932877] [2022-10-17 17:43:34,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563932877] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:34,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295129936] [2022-10-17 17:43:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:34,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:34,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:34,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:34,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:43:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 116 conjunts are in the unsatisfiable core [2022-10-17 17:43:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:34,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-10-17 17:43:34,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-10-17 17:43:34,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:34,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:43:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:34,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:43:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:43:38,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:43:38,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295129936] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:38,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:43:38,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-10-17 17:43:38,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949670309] [2022-10-17 17:43:38,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:38,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:43:38,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:43:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:43:38,322 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) [2022-10-17 17:43:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:39,089 INFO L93 Difference]: Finished difference Result 247 states and 376 transitions. [2022-10-17 17:43:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 17:43:39,091 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 [2022-10-17 17:43:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:39,110 INFO L225 Difference]: With dead ends: 247 [2022-10-17 17:43:39,110 INFO L226 Difference]: Without dead ends: 163 [2022-10-17 17:43:39,116 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 [2022-10-17 17:43:39,124 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 26 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:39,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 757 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 257 Invalid, 0 Unknown, 102 Unchecked, 0.5s Time] [2022-10-17 17:43:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-10-17 17:43:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2022-10-17 17:43:39,204 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) [2022-10-17 17:43:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2022-10-17 17:43:39,215 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 70 [2022-10-17 17:43:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:39,216 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2022-10-17 17:43:39,216 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) [2022-10-17 17:43:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2022-10-17 17:43:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-17 17:43:39,225 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:39,226 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] [2022-10-17 17:43:39,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:39,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:43:39,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:39,451 INFO L85 PathProgramCache]: Analyzing trace with hash 134050646, now seen corresponding path program 1 times [2022-10-17 17:43:39,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:39,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129244207] [2022-10-17 17:43:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-10-17 17:43:39,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129244207] [2022-10-17 17:43:39,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129244207] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824310730] [2022-10-17 17:43:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:39,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:43:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 122 conjunts are in the unsatisfiable core [2022-10-17 17:43:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:40,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:43:40,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-10-17 17:43:40,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-10-17 17:43:40,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-10-17 17:43:40,311 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 17:43:40,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-10-17 17:43:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:43:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:43:40,370 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 17:43:40,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-10-17 17:43:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:43:40,408 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 17:43:40,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:43:40,539 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-10-17 17:43:40,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_97| input size 62 context size 62 output size 62 [2022-10-17 17:43:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869118884] [2022-10-17 17:43:40,560 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-10-17 17:43:40,561 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:43:40,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:43:40,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:43:40,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:43:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,714 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-10-17 17:43:40,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-10-17 17:43:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:40,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-10-17 17:43:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-10-17 17:43:41,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-10-17 17:43:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-10-17 17:43:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-10-17 17:43:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:43:41,354 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-10-17 17:43:41,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-10-17 17:43:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 28 [2022-10-17 17:43:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:43:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:43:41,448 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-10-17 17:43:41,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-10-17 17:43:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,552 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-10-17 17:43:41,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-10-17 17:43:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,690 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-10-17 17:43:41,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-10-17 17:43:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-10-17 17:43:41,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:43:41,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:43:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-10-17 17:43:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-10-17 17:43:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-10-17 17:43:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:41,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-10-17 17:43:41,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:43:42,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:43:42,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:43:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-10-17 17:43:42,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-10-17 17:43:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-10-17 17:43:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-10-17 17:43:42,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:43:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-10-17 17:43:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-10-17 17:43:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-10-17 17:43:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:43:42,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-10-17 17:43:45,080 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-10-17 17:43:45,455 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 96 for LOIs [2022-10-17 17:43:45,734 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-10-17 17:43:45,736 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-10-17 17:43:45,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:43:50,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [869118884] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:50,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:43:50,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 24 [2022-10-17 17:43:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141425577] [2022-10-17 17:43:50,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 17:43:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 17:43:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-10-17 17:43:50,775 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-10-17 17:43:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:51,639 INFO L93 Difference]: Finished difference Result 214 states and 285 transitions. [2022-10-17 17:43:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 17:43:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 71 [2022-10-17 17:43:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:51,641 INFO L225 Difference]: With dead ends: 214 [2022-10-17 17:43:51,641 INFO L226 Difference]: Without dead ends: 121 [2022-10-17 17:43:51,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-10-17 17:43:51,644 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 10 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:51,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 466 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2022-10-17 17:43:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-17 17:43:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2022-10-17 17:43:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 60 states have internal predecessors, (70), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-10-17 17:43:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2022-10-17 17:43:51,677 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 71 [2022-10-17 17:43:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:51,677 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2022-10-17 17:43:51,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-10-17 17:43:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2022-10-17 17:43:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-17 17:43:51,679 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:51,680 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:51,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:51,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:51,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash -767368542, now seen corresponding path program 1 times [2022-10-17 17:43:51,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:51,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117103908] [2022-10-17 17:43:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-10-17 17:43:52,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117103908] [2022-10-17 17:43:52,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117103908] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981798776] [2022-10-17 17:43:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:52,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:52,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:52,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:52,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:43:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:43:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 17:43:52,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:43:52,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981798776] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:52,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:43:52,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-10-17 17:43:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467746875] [2022-10-17 17:43:52,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:52,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:43:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:43:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:43:52,570 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 17:43:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:52,856 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2022-10-17 17:43:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:43:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2022-10-17 17:43:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:52,859 INFO L225 Difference]: With dead ends: 204 [2022-10-17 17:43:52,859 INFO L226 Difference]: Without dead ends: 122 [2022-10-17 17:43:52,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:43:52,861 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 54 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:52,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 504 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:43:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-10-17 17:43:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-10-17 17:43:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 65 states have internal predecessors, (73), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-10-17 17:43:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2022-10-17 17:43:52,894 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 72 [2022-10-17 17:43:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:52,895 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2022-10-17 17:43:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 17:43:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2022-10-17 17:43:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:43:52,897 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:52,898 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:52,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:53,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:53,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1927036773, now seen corresponding path program 1 times [2022-10-17 17:43:53,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:53,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780202737] [2022-10-17 17:43:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-10-17 17:43:53,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:53,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780202737] [2022-10-17 17:43:53,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780202737] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:53,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614785678] [2022-10-17 17:43:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:53,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:53,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:53,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:53,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:43:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:43:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 17:43:53,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:43:53,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614785678] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:53,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:43:53,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-10-17 17:43:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785001452] [2022-10-17 17:43:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:53,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:43:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:43:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:43:53,740 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 17:43:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:54,183 INFO L93 Difference]: Finished difference Result 221 states and 307 transitions. [2022-10-17 17:43:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:43:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2022-10-17 17:43:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:54,186 INFO L225 Difference]: With dead ends: 221 [2022-10-17 17:43:54,186 INFO L226 Difference]: Without dead ends: 134 [2022-10-17 17:43:54,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:43:54,188 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 83 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:54,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 589 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:43:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-17 17:43:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2022-10-17 17:43:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-10-17 17:43:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 167 transitions. [2022-10-17 17:43:54,251 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 167 transitions. Word has length 74 [2022-10-17 17:43:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:54,252 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 167 transitions. [2022-10-17 17:43:54,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 17:43:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 167 transitions. [2022-10-17 17:43:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 17:43:54,254 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:54,254 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:54,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:54,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:54,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -48600209, now seen corresponding path program 1 times [2022-10-17 17:43:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:54,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418527584] [2022-10-17 17:43:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-10-17 17:43:54,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418527584] [2022-10-17 17:43:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418527584] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061767568] [2022-10-17 17:43:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:54,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:54,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:54,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:54,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:43:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:43:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-10-17 17:43:55,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:43:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061767568] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:55,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:43:55,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-10-17 17:43:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4815124] [2022-10-17 17:43:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:55,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:43:55,108 INFO L87 Difference]: Start difference. First operand 124 states and 167 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:43:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:55,185 INFO L93 Difference]: Finished difference Result 222 states and 311 transitions. [2022-10-17 17:43:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 75 [2022-10-17 17:43:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:55,193 INFO L225 Difference]: With dead ends: 222 [2022-10-17 17:43:55,194 INFO L226 Difference]: Without dead ends: 133 [2022-10-17 17:43:55,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:43:55,196 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:55,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:43:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-10-17 17:43:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2022-10-17 17:43:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 68 states have internal predecessors, (77), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-10-17 17:43:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2022-10-17 17:43:55,238 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 75 [2022-10-17 17:43:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:55,239 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2022-10-17 17:43:55,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:43:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2022-10-17 17:43:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:43:55,241 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:55,242 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:55,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:55,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:55,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1197770305, now seen corresponding path program 1 times [2022-10-17 17:43:55,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:55,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713907128] [2022-10-17 17:43:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:55,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 17:43:55,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713907128] [2022-10-17 17:43:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713907128] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:43:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655941362] [2022-10-17 17:43:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:55,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:55,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:55,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:55,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45b4e259-9d87-4e01-93e5-a6660c62b611/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:43:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 67 conjunts are in the unsatisfiable core [2022-10-17 17:43:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:56,141 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-10-17 17:43:56,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-10-17 17:43:56,163 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 17:43:56,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 17:43:56,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-10-17 17:43:56,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-10-17 17:43:56,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2022-10-17 17:43:56,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13