./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh --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 b1945af2ade54d1624a03901c69c53701706acb2f9d45d13f3de2c91731e4958 --- 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-2329fc7 [2022-12-14 15:20:57,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:20:57,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:20:57,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:20:57,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:20:57,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:20:57,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:20:57,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:20:57,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:20:57,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:20:57,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:20:57,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:20:57,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:20:57,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:20:57,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:20:57,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:20:57,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:20:57,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:20:57,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:20:57,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:20:57,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:20:57,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:20:57,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:20:57,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:20:57,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:20:57,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:20:57,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:20:57,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:20:57,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:20:57,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:20:57,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:20:57,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:20:57,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:20:57,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:20:57,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:20:57,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:20:57,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:20:57,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:20:57,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:20:57,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:20:57,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:20:57,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 15:20:57,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:20:57,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:20:57,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:20:57,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:20:57,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:20:57,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:20:57,163 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:20:57,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:20:57,163 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:20:57,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:20:57,163 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:20:57,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:20:57,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:20:57,164 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:20:57,164 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:20:57,164 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:20:57,164 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:20:57,164 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:20:57,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:20:57,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:20:57,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:20:57,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:20:57,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:20:57,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:20:57,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:20:57,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:20:57,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:20:57,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:20:57,167 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:20:57,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:20:57,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:20:57,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:20:57,167 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_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1945af2ade54d1624a03901c69c53701706acb2f9d45d13f3de2c91731e4958 [2022-12-14 15:20:57,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:20:57,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:20:57,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:20:57,366 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:20:57,367 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:20:57,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i [2022-12-14 15:20:59,964 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:21:00,220 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:21:00,221 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i [2022-12-14 15:21:00,250 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/data/1b35e0a11/f2a36a8602fd4a05a395a39f25983f69/FLAG8eccba27c [2022-12-14 15:21:00,263 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/data/1b35e0a11/f2a36a8602fd4a05a395a39f25983f69 [2022-12-14 15:21:00,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:21:00,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:21:00,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:21:00,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:21:00,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:21:00,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:21:00" (1/1) ... [2022-12-14 15:21:00,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68183d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:00, skipping insertion in model container [2022-12-14 15:21:00,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:21:00" (1/1) ... [2022-12-14 15:21:00,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:21:00,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:21:00,564 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4496,4509] [2022-12-14 15:21:00,569 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4556,4569] [2022-12-14 15:21:01,133 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 15:21:01,138 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,139 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,140 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,140 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,142 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,157 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,158 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,160 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,161 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,163 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,164 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,165 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,165 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,235 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:01,236 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:01,236 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:01,240 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 15:21:01,242 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 15:21:01,242 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 15:21:01,473 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 15:21:01,474 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 15:21:01,474 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 15:21:01,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 15:21:01,476 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 15:21:01,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 15:21:01,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 15:21:01,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 15:21:01,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 15:21:01,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 15:21:01,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 15:21:01,581 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 15:21:01,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:21:01,610 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:21:01,619 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4496,4509] [2022-12-14 15:21:01,620 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i[4556,4569] [2022-12-14 15:21:01,644 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 15:21:01,647 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,647 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,647 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,648 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,648 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,653 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,654 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,654 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,655 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,656 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,656 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,656 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,657 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 15:21:01,661 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:01,662 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:01,662 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 15:21:01,665 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 15:21:01,666 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 15:21:01,666 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 15:21:01,682 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 15:21:01,683 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 15:21:01,684 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 15:21:01,685 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 15:21:01,685 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 15:21:01,686 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 15:21:01,686 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 15:21:01,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 15:21:01,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 15:21:01,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 15:21:01,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 15:21:01,704 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 15:21:01,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:21:01,830 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:21:01,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01 WrapperNode [2022-12-14 15:21:01,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:21:01,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:21:01,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:21:01,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:21:01,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,922 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-12-14 15:21:01,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:21:01,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:21:01,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:21:01,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:21:01,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:21:01,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:21:01,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:21:01,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:21:01,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (1/1) ... [2022-12-14 15:21:01,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:21:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:01,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:21:01,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:21:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:21:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:21:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 15:21:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 15:21:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:21:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 15:21:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:21:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 15:21:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 15:21:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 15:21:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 15:21:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:21:02,231 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:21:02,233 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:21:02,447 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:21:02,527 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:21:02,528 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 15:21:02,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:21:02 BoogieIcfgContainer [2022-12-14 15:21:02,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:21:02,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:21:02,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:21:02,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:21:02,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:21:00" (1/3) ... [2022-12-14 15:21:02,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ad40f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:21:02, skipping insertion in model container [2022-12-14 15:21:02,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:21:01" (2/3) ... [2022-12-14 15:21:02,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ad40f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:21:02, skipping insertion in model container [2022-12-14 15:21:02,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:21:02" (3/3) ... [2022-12-14 15:21:02,538 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness_negated.i [2022-12-14 15:21:02,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:21:02,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:21:02,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:21:02,607 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;@197c608d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:21:02,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:21:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 15:21:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 15:21:02,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:02,618 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:21:02,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1901947457, now seen corresponding path program 1 times [2022-12-14 15:21:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:02,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375347670] [2022-12-14 15:21:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:03,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375347670] [2022-12-14 15:21:03,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375347670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:03,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997042102] [2022-12-14 15:21:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:03,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:03,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:03,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:21:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:21:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:03,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:03,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997042102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:03,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:03,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-12-14 15:21:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128313886] [2022-12-14 15:21:03,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:03,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:21:03,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:21:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:03,439 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:21:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:03,544 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2022-12-14 15:21:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:21:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-12-14 15:21:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:03,555 INFO L225 Difference]: With dead ends: 85 [2022-12-14 15:21:03,555 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 15:21:03,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:03,562 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:03,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 15:21:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 15:21:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-12-14 15:21:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-12-14 15:21:03,604 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 37 [2022-12-14 15:21:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:03,604 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-12-14 15:21:03,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:21:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-12-14 15:21:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 15:21:03,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:03,606 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:21:03,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 15:21:03,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 936457051, now seen corresponding path program 1 times [2022-12-14 15:21:03,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:03,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495814152] [2022-12-14 15:21:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:03,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:04,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495814152] [2022-12-14 15:21:04,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495814152] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789298199] [2022-12-14 15:21:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:04,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:04,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:04,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:21:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:21:04,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:21:04,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:04,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789298199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:04,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:04,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:21:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648154392] [2022-12-14 15:21:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:04,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:21:04,325 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:21:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:04,443 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2022-12-14 15:21:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:21:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-12-14 15:21:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:04,445 INFO L225 Difference]: With dead ends: 86 [2022-12-14 15:21:04,445 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 15:21:04,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:21:04,448 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:04,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 152 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 15:21:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 15:21:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-12-14 15:21:04,461 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 39 [2022-12-14 15:21:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:04,462 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-12-14 15:21:04,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:21:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-12-14 15:21:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:21:04,464 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:04,464 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:21:04,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:21:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:04,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 229502625, now seen corresponding path program 1 times [2022-12-14 15:21:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:04,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060438259] [2022-12-14 15:21:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:04,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:04,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:04,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060438259] [2022-12-14 15:21:04,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060438259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557931710] [2022-12-14 15:21:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:04,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:04,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:04,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:04,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:21:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:05,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:21:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:21:05,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:05,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557931710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:05,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 15:21:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958715898] [2022-12-14 15:21:05,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:05,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:05,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:05,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:21:05,137 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:21:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:05,291 INFO L93 Difference]: Finished difference Result 101 states and 140 transitions. [2022-12-14 15:21:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-12-14 15:21:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:05,293 INFO L225 Difference]: With dead ends: 101 [2022-12-14 15:21:05,293 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 15:21:05,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:21:05,294 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 63 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:05,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 179 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 15:21:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-12-14 15:21:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-12-14 15:21:05,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 41 [2022-12-14 15:21:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:05,305 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-12-14 15:21:05,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:21:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-12-14 15:21:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 15:21:05,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:05,306 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:21:05,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:21:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:05,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -523042093, now seen corresponding path program 1 times [2022-12-14 15:21:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052817127] [2022-12-14 15:21:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:05,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052817127] [2022-12-14 15:21:05,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052817127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600970511] [2022-12-14 15:21:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:05,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:05,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:05,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:21:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:21:05,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:21:05,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:05,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600970511] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:05,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:05,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 15:21:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263452354] [2022-12-14 15:21:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:05,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:21:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:21:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:05,853 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:21:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:05,893 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2022-12-14 15:21:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:21:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-12-14 15:21:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:05,894 INFO L225 Difference]: With dead ends: 102 [2022-12-14 15:21:05,894 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 15:21:05,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:05,895 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:05,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:21:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 15:21:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-12-14 15:21:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2022-12-14 15:21:05,902 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 42 [2022-12-14 15:21:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:05,902 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2022-12-14 15:21:05,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:21:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2022-12-14 15:21:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:21:05,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:05,903 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:21:05,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:21:06,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:06,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1075265638, now seen corresponding path program 1 times [2022-12-14 15:21:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:06,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383196793] [2022-12-14 15:21:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:06,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:06,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383196793] [2022-12-14 15:21:06,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383196793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507551209] [2022-12-14 15:21:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:06,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:21:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:21:06,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:06,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:06,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507551209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:06,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:21:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694959499] [2022-12-14 15:21:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:06,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:21:06,424 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:06,511 INFO L93 Difference]: Finished difference Result 101 states and 136 transitions. [2022-12-14 15:21:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:06,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2022-12-14 15:21:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:06,513 INFO L225 Difference]: With dead ends: 101 [2022-12-14 15:21:06,513 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 15:21:06,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:06,514 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:06,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 219 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 15:21:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-12-14 15:21:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-12-14 15:21:06,523 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 45 [2022-12-14 15:21:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:06,524 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-12-14 15:21:06,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-12-14 15:21:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:21:06,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:06,525 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:21:06,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:21:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:06,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:06,729 INFO L85 PathProgramCache]: Analyzing trace with hash -300718304, now seen corresponding path program 1 times [2022-12-14 15:21:06,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:06,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013450267] [2022-12-14 15:21:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:06,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:21:07,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013450267] [2022-12-14 15:21:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013450267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830657443] [2022-12-14 15:21:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:07,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:07,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:07,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:21:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:21:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:21:07,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:07,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830657443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:07,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:07,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 15:21:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669991861] [2022-12-14 15:21:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:21:07,619 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:07,729 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2022-12-14 15:21:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:21:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 47 [2022-12-14 15:21:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:07,731 INFO L225 Difference]: With dead ends: 106 [2022-12-14 15:21:07,731 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 15:21:07,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:21:07,733 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:07,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 266 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 15:21:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-12-14 15:21:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 36 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2022-12-14 15:21:07,743 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 47 [2022-12-14 15:21:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:07,743 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2022-12-14 15:21:07,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2022-12-14 15:21:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 15:21:07,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:07,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:07,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:21:07,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 15:21:07,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash 219978292, now seen corresponding path program 1 times [2022-12-14 15:21:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:07,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677211026] [2022-12-14 15:21:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:21:08,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:08,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677211026] [2022-12-14 15:21:08,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677211026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:08,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563852438] [2022-12-14 15:21:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:08,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:08,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:21:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:21:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:21:08,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:08,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563852438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:08,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:08,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-12-14 15:21:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465765665] [2022-12-14 15:21:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:21:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:21:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:08,285 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:08,352 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2022-12-14 15:21:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:21:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 48 [2022-12-14 15:21:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:08,354 INFO L225 Difference]: With dead ends: 96 [2022-12-14 15:21:08,354 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 15:21:08,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:21:08,356 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:08,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 168 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 15:21:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-14 15:21:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 38 states have internal predecessors, (42), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-14 15:21:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-12-14 15:21:08,362 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 48 [2022-12-14 15:21:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:08,362 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-12-14 15:21:08,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-12-14 15:21:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:21:08,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:08,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:08,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:21:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:08,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 136428568, now seen corresponding path program 1 times [2022-12-14 15:21:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:08,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548411514] [2022-12-14 15:21:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:21:08,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548411514] [2022-12-14 15:21:08,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548411514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686584379] [2022-12-14 15:21:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:08,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:08,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:08,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:08,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:21:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:21:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:09,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:09,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686584379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:09,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:09,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-12-14 15:21:09,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306712126] [2022-12-14 15:21:09,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:09,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:09,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:21:09,047 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:09,177 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2022-12-14 15:21:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-12-14 15:21:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:09,179 INFO L225 Difference]: With dead ends: 103 [2022-12-14 15:21:09,179 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 15:21:09,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:21:09,180 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:09,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 170 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 15:21:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-14 15:21:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 38 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-14 15:21:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-12-14 15:21:09,187 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 50 [2022-12-14 15:21:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:09,187 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-12-14 15:21:09,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-12-14 15:21:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 15:21:09,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:09,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:09,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:21:09,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:09,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash -488695534, now seen corresponding path program 1 times [2022-12-14 15:21:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:09,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720210600] [2022-12-14 15:21:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:21:09,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720210600] [2022-12-14 15:21:09,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720210600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030807569] [2022-12-14 15:21:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:09,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:09,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:21:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:21:09,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:21:09,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:09,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030807569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:09,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:09,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-12-14 15:21:09,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257051924] [2022-12-14 15:21:09,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:09,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:21:09,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:21:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:21:09,942 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:10,114 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2022-12-14 15:21:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-12-14 15:21:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:10,115 INFO L225 Difference]: With dead ends: 105 [2022-12-14 15:21:10,115 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 15:21:10,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-12-14 15:21:10,116 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:10,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 190 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 15:21:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-12-14 15:21:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-12-14 15:21:10,124 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 52 [2022-12-14 15:21:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:10,125 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-12-14 15:21:10,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:21:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-12-14 15:21:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 15:21:10,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:10,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:10,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:21:10,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:10,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash 496130553, now seen corresponding path program 1 times [2022-12-14 15:21:10,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:10,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394859060] [2022-12-14 15:21:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:10,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 15:21:10,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394859060] [2022-12-14 15:21:10,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394859060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401790747] [2022-12-14 15:21:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:10,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:10,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:10,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:21:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:21:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 15:21:10,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:10,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401790747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:10,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:10,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 15:21:10,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467600415] [2022-12-14 15:21:10,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:10,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:10,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:21:10,766 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:10,845 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2022-12-14 15:21:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 56 [2022-12-14 15:21:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:10,846 INFO L225 Difference]: With dead ends: 93 [2022-12-14 15:21:10,846 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 15:21:10,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:21:10,847 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:10,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 211 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 15:21:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-12-14 15:21:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-14 15:21:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-12-14 15:21:10,852 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 56 [2022-12-14 15:21:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:10,852 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-12-14 15:21:10,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:21:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-12-14 15:21:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 15:21:10,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:10,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:10,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:21:11,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:21:11,054 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1587528371, now seen corresponding path program 2 times [2022-12-14 15:21:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:11,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885334883] [2022-12-14 15:21:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:11,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885334883] [2022-12-14 15:21:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885334883] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314708426] [2022-12-14 15:21:11,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:21:11,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:11,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:11,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:11,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:21:11,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 15:21:11,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:21:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:21:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:21:11,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:11,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314708426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:11,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:11,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-12-14 15:21:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998887800] [2022-12-14 15:21:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:21:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:21:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:21:11,737 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 15:21:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:11,812 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-12-14 15:21:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:21:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2022-12-14 15:21:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:11,814 INFO L225 Difference]: With dead ends: 63 [2022-12-14 15:21:11,814 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 15:21:11,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:21:11,815 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:11,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 212 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 15:21:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-12-14 15:21:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-12-14 15:21:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-12-14 15:21:11,821 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 58 [2022-12-14 15:21:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:11,822 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-12-14 15:21:11,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 15:21:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-12-14 15:21:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 15:21:11,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:11,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:11,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:21:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:21:12,024 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash -546324557, now seen corresponding path program 1 times [2022-12-14 15:21:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:12,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630587569] [2022-12-14 15:21:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:12,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630587569] [2022-12-14 15:21:12,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630587569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594364192] [2022-12-14 15:21:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:12,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:12,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:12,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:12,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:21:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 15:21:12,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:21:12,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:21:12,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594364192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:12,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:21:12,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2022-12-14 15:21:12,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751754936] [2022-12-14 15:21:12,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:12,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:12,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:21:12,732 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 15:21:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:12,825 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2022-12-14 15:21:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:21:12,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2022-12-14 15:21:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:12,826 INFO L225 Difference]: With dead ends: 106 [2022-12-14 15:21:12,826 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 15:21:12,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:21:12,827 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:12,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 243 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 15:21:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-12-14 15:21:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-14 15:21:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-12-14 15:21:12,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 64 [2022-12-14 15:21:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:12,832 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-12-14 15:21:12,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 15:21:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-12-14 15:21:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 15:21:12,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:12,832 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:12,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:21:13,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:21:13,034 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash 688814871, now seen corresponding path program 1 times [2022-12-14 15:21:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:13,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181940189] [2022-12-14 15:21:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:15,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181940189] [2022-12-14 15:21:15,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181940189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:21:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627360023] [2022-12-14 15:21:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:15,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:21:15,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:21:15,668 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:21:15,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:21:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 15:21:15,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:21:16,005 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 15:21:16,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-14 15:21:16,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 15:21:16,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 15:21:16,071 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 13 [2022-12-14 15:21:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:21:25,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:21:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:21:29,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627360023] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:21:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575891360] [2022-12-14 15:21:29,084 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-12-14 15:21:29,084 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:21:29,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:21:29,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:21:29,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:21:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,161 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 15:21:29,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 15:21:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 15:21:29,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,359 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:21:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,382 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:21:29,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 15:21:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 15:21:29,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 15:21:29,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 15:21:29,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 15:21:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:21:29,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 15:21:31,344 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 194 for LOIs [2022-12-14 15:21:31,680 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 15:21:32,361 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 15:21:32,362 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 15:21:32,377 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 15:21:32,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:21:44,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4947#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_#t~ret327#1_BEFORE_CALL_9| Int)) (and (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_#t~ret327#1_BEFORE_CALL_9|) (<= |v_ULTIMATE.start_aws_linked_list_rbegin_#t~ret327#1_BEFORE_CALL_9| 1) (= |__VERIFIER_assert_#in~cond| (ite (= (ite (= (mod |v_ULTIMATE.start_aws_linked_list_rbegin_#t~ret327#1_BEFORE_CALL_9| 256) 0) 1 0) 0) 0 1)))) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 8) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 24) 0) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|)) (= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 16)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 16) 0) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|)) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|)) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14| 0)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_14|) 1))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 15:21:44,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:21:44,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:21:44,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 11] total 37 [2022-12-14 15:21:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889788500] [2022-12-14 15:21:44,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:21:44,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 15:21:44,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 15:21:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=3942, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 15:21:44,264 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 33 states have internal predecessors, (95), 15 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2022-12-14 15:21:46,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:48,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:53,335 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2022-12-14 15:21:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 15:21:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 33 states have internal predecessors, (95), 15 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) Word has length 65 [2022-12-14 15:21:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:53,336 INFO L225 Difference]: With dead ends: 180 [2022-12-14 15:21:53,336 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 15:21:53,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=950, Invalid=7240, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 15:21:53,338 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 288 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 345 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:53,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 442 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 15:21:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 15:21:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2022-12-14 15:21:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 25 states have call successors, (25), 10 states have call predecessors, (25), 13 states have return successors, (31), 24 states have call predecessors, (31), 23 states have call successors, (31) [2022-12-14 15:21:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2022-12-14 15:21:53,369 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 65 [2022-12-14 15:21:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:53,369 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2022-12-14 15:21:53,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 33 states have internal predecessors, (95), 15 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2022-12-14 15:21:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2022-12-14 15:21:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 15:21:53,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:53,371 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:53,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:21:53,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:21:53,572 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1214424754, now seen corresponding path program 1 times [2022-12-14 15:21:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:53,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842192862] [2022-12-14 15:21:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:21:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 15:21:53,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:21:53,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842192862] [2022-12-14 15:21:53,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842192862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:21:53,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:21:53,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:21:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333490275] [2022-12-14 15:21:53,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:21:53,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:21:53,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:21:53,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:21:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:21:53,868 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 15:21:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:21:53,992 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2022-12-14 15:21:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:21:53,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 67 [2022-12-14 15:21:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:21:53,993 INFO L225 Difference]: With dead ends: 122 [2022-12-14 15:21:53,993 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 15:21:53,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:21:53,994 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:21:53,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 243 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:21:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 15:21:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-12-14 15:21:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 73 states have (on average 1.178082191780822) internal successors, (86), 79 states have internal predecessors, (86), 27 states have call successors, (27), 12 states have call predecessors, (27), 17 states have return successors, (37), 26 states have call predecessors, (37), 25 states have call successors, (37) [2022-12-14 15:21:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 150 transitions. [2022-12-14 15:21:54,016 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 150 transitions. Word has length 67 [2022-12-14 15:21:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:21:54,016 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 150 transitions. [2022-12-14 15:21:54,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 15:21:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 150 transitions. [2022-12-14 15:21:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:21:54,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:21:54,017 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:54,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 15:21:54,017 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:21:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:21:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash -318758414, now seen corresponding path program 1 times [2022-12-14 15:21:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:21:54,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775614486] [2022-12-14 15:21:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:21:54,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:21:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:21:54,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 15:21:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:21:54,177 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 15:21:54,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 15:21:54,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 15:21:54,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 15:21:54,182 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:21:54,184 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 15:21:54,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:21:54 BoogieIcfgContainer [2022-12-14 15:21:54,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 15:21:54,222 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 15:21:54,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 15:21:54,222 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 15:21:54,222 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:21:02" (3/4) ... [2022-12-14 15:21:54,224 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 15:21:54,264 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 15:21:54,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 15:21:54,265 INFO L158 Benchmark]: Toolchain (without parser) took 53998.21ms. Allocated memory was 121.6MB in the beginning and 308.3MB in the end (delta: 186.6MB). Free memory was 73.2MB in the beginning and 219.3MB in the end (delta: -146.1MB). Peak memory consumption was 42.4MB. Max. memory is 16.1GB. [2022-12-14 15:21:54,265 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 96.5MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:21:54,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1562.32ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 72.9MB in the beginning and 54.9MB in the end (delta: 18.1MB). Peak memory consumption was 51.6MB. Max. memory is 16.1GB. [2022-12-14 15:21:54,265 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.27ms. Allocated memory is still 146.8MB. Free memory was 54.9MB in the beginning and 99.1MB in the end (delta: -44.2MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2022-12-14 15:21:54,266 INFO L158 Benchmark]: Boogie Preprocessor took 37.25ms. Allocated memory is still 146.8MB. Free memory was 99.1MB in the beginning and 96.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:21:54,266 INFO L158 Benchmark]: RCFGBuilder took 569.42ms. Allocated memory is still 146.8MB. Free memory was 96.1MB in the beginning and 60.4MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-12-14 15:21:54,266 INFO L158 Benchmark]: TraceAbstraction took 51689.13ms. Allocated memory was 146.8MB in the beginning and 308.3MB in the end (delta: 161.5MB). Free memory was 60.4MB in the beginning and 225.6MB in the end (delta: -165.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:21:54,266 INFO L158 Benchmark]: Witness Printer took 42.77ms. Allocated memory is still 308.3MB. Free memory was 225.6MB in the beginning and 219.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 15:21:54,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 96.5MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1562.32ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 72.9MB in the beginning and 54.9MB in the end (delta: 18.1MB). Peak memory consumption was 51.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.27ms. Allocated memory is still 146.8MB. Free memory was 54.9MB in the beginning and 99.1MB in the end (delta: -44.2MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.25ms. Allocated memory is still 146.8MB. Free memory was 99.1MB in the beginning and 96.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 569.42ms. Allocated memory is still 146.8MB. Free memory was 96.1MB in the beginning and 60.4MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 51689.13ms. Allocated memory was 146.8MB in the beginning and 308.3MB in the end (delta: 161.5MB). Free memory was 60.4MB in the beginning and 225.6MB in the end (delta: -165.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 42.77ms. Allocated memory is still 308.3MB. Free memory was 225.6MB in the beginning and 219.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6913-L6918] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7358] static __thread int tl_last_error = 0; [L7392] CALL aws_linked_list_rbegin_harness() [L7376] struct aws_linked_list list; [L7378] CALL ensure_linked_list_is_allocated(&list, 20) [L6755] CALL, EXPR nondet_uint64_t() VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L266] return __VERIFIER_nondet_ulong(); [L6755] RET, EXPR nondet_uint64_t() VAL [\old(max_length)=20, list={6:0}, list={6:0}, max_length=20, nondet_uint64_t()=18446744073709551616, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6755] size_t length = nondet_uint64_t(); [L6756] CALL assume_abort_if_not(length <= max_length) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L6756] RET assume_abort_if_not(length <= max_length) VAL [\old(max_length)=20, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6758-L6759] list->head.prev = ((void *)0) [L6761-L6762] list->tail.next = ((void *)0) [L6765] struct aws_linked_list_node *curr = &list->head; [L6767] size_t i = 0; VAL [\old(max_length)=20, curr={6:0}, i=0, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6767] COND FALSE !(i < length) [L6776] curr->next = &list->tail [L6777] list->tail.prev = curr [L7378] RET ensure_linked_list_is_allocated(&list, 20) [L7381] CALL, EXPR aws_linked_list_is_valid(&list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L7381] RET, EXPR aws_linked_list_is_valid(&list) VAL [aws_linked_list_is_valid(&list)=1, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7381] CALL assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L7381] RET assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [aws_linked_list_is_valid(&list)=1, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7386] CALL aws_linked_list_rbegin(&list) [L4812] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4812] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4812] CALL assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L4812] RET assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4813] EXPR list->tail.prev [L4813] struct aws_linked_list_node *rval = list->tail.prev; [L4814] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4814] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4814] CALL __VERIFIER_assert(!((aws_linked_list_is_valid(list)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 51.6s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 537 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 515 mSDsluCounter, 2961 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2347 mSDsCounter, 404 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2436 IncrementalHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 404 mSolverCounterUnsat, 614 mSDtfsCounter, 2436 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 949 GetRequests, 707 SyntacticMatches, 11 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 23.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=14, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 76 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 1425 NumberOfCodeBlocks, 1385 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1392 ConstructedInterpolants, 38 QuantifiedInterpolants, 10329 SizeOfPredicates, 96 NumberOfNonLiveVariables, 4078 ConjunctsInSsa, 249 ConjunctsInUnsatCore, 28 InterpolantComputations, 13 PerfectInterpolantSequences, 557/726 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 15:21:54,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a231ae82-5acc-4273-ab6d-5c40154d1c95/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE