./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3a98a47bac7562a35bba31573ebdfd704a9d27baca1b439deea796ac12a0961b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:36:04,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:36:04,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:36:04,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:36:04,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:36:04,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:36:04,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:36:04,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:36:04,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:36:04,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:36:04,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:36:04,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:36:04,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:36:04,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:36:04,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:36:04,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:36:04,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:36:04,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:36:04,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:36:04,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:36:04,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:36:04,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:36:04,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:36:04,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:36:04,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:36:04,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:36:04,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:36:04,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:36:04,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:36:04,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:36:04,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:36:04,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:36:04,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:36:04,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:36:04,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:36:04,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:36:04,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:36:04,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:36:04,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:36:04,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:36:04,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:36:04,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:36:04,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:36:04,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:36:04,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:36:04,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:36:04,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:36:04,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:36:04,611 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:36:04,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:36:04,612 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:36:04,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:36:04,619 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:36:04,619 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:36:04,619 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:36:04,620 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:36:04,620 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:36:04,620 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:36:04,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:36:04,621 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:36:04,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:36:04,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:36:04,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:36:04,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:36:04,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:36:04,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:36:04,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:36:04,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:36:04,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:36:04,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:36:04,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:36:04,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:36:04,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:36:04,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:36:04,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:36:04,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:36:04,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:36:04,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:36:04,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:36:04,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:36:04,631 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a98a47bac7562a35bba31573ebdfd704a9d27baca1b439deea796ac12a0961b [2021-11-21 01:36:05,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:36:05,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:36:05,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:36:05,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:36:05,058 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:36:05,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i [2021-11-21 01:36:05,161 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/data/d3861d444/2d580acfe8fa4766b76758de3fe5d990/FLAG5da42872c [2021-11-21 01:36:06,208 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:36:06,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i [2021-11-21 01:36:06,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/data/d3861d444/2d580acfe8fa4766b76758de3fe5d990/FLAG5da42872c [2021-11-21 01:36:06,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/data/d3861d444/2d580acfe8fa4766b76758de3fe5d990 [2021-11-21 01:36:06,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:36:06,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:36:06,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:36:06,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:36:06,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:36:06,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:36:06" (1/1) ... [2021-11-21 01:36:06,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cc52d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:06, skipping insertion in model container [2021-11-21 01:36:06,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:36:06" (1/1) ... [2021-11-21 01:36:06,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:36:06,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:36:07,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i[4493,4506] [2021-11-21 01:36:07,113 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i[4553,4566] [2021-11-21 01:36:08,174 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:36:08,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,359 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,361 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,363 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,366 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,367 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,369 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:08,866 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:36:08,867 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:36:08,868 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:36:08,870 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:36:08,871 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:36:08,872 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:36:08,873 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:36:08,874 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:36:08,875 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:36:08,876 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:36:09,034 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,034 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,040 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,048 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:36:09,143 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:36:09,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i[4493,4506] [2021-11-21 01:36:09,160 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/sv-benchmarks/c/aws-c-common/aws_array_list_copy_harness.i[4553,4566] [2021-11-21 01:36:09,199 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:36:09,218 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,220 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,221 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,230 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,230 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,231 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,232 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,233 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,234 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,316 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:36:09,317 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:36:09,319 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:36:09,320 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:36:09,321 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:36:09,324 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:36:09,325 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:36:09,326 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:36:09,327 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:36:09,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:36:09,453 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,467 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:09,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:36:09,903 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:36:09,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09 WrapperNode [2021-11-21 01:36:09,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:36:09,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:36:09,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:36:09,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:36:09,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,131 INFO L137 Inliner]: procedures = 691, calls = 1673, calls flagged for inlining = 52, calls inlined = 7, statements flattened = 695 [2021-11-21 01:36:10,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:36:10,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:36:10,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:36:10,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:36:10,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:36:10,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:36:10,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:36:10,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:36:10,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (1/1) ... [2021-11-21 01:36:10,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:36:10,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:10,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:36:10,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:36:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:36:10,364 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-21 01:36:10,364 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-21 01:36:10,364 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-21 01:36:10,364 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-21 01:36:10,365 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:36:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:36:10,365 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-21 01:36:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-21 01:36:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:36:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 01:36:10,366 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 01:36:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:36:10,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:36:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:36:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:36:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:36:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-21 01:36:10,368 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-21 01:36:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:36:10,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:36:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:36:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:36:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-21 01:36:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-21 01:36:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-21 01:36:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-21 01:36:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-21 01:36:10,370 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-21 01:36:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:36:10,370 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:36:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-21 01:36:10,371 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-21 01:36:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-21 01:36:10,371 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-21 01:36:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:36:10,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:36:10,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:36:10,372 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 01:36:10,372 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 01:36:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-21 01:36:10,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-21 01:36:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:36:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-21 01:36:10,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-21 01:36:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:36:10,687 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:36:10,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:36:12,065 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:36:12,194 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:36:12,195 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:36:12,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:36:12 BoogieIcfgContainer [2021-11-21 01:36:12,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:36:12,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:36:12,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:36:12,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:36:12,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:36:06" (1/3) ... [2021-11-21 01:36:12,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4788f00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:36:12, skipping insertion in model container [2021-11-21 01:36:12,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:09" (2/3) ... [2021-11-21 01:36:12,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4788f00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:36:12, skipping insertion in model container [2021-11-21 01:36:12,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:36:12" (3/3) ... [2021-11-21 01:36:12,262 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_copy_harness.i [2021-11-21 01:36:12,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:36:12,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:36:12,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:36:12,370 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:36:12,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:36:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 91 states have internal predecessors, (106), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-11-21 01:36:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-21 01:36:12,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:12,434 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:12,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1241954246, now seen corresponding path program 1 times [2021-11-21 01:36:12,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:12,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528802673] [2021-11-21 01:36:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:12,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:13,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528802673] [2021-11-21 01:36:13,247 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-21 01:36:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232440872] [2021-11-21 01:36:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:13,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:13,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:13,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:36:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:36:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-21 01:36:14,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232440872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:14,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:14,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:36:14,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710622820] [2021-11-21 01:36:14,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:14,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:36:14,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:36:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:14,409 INFO L87 Difference]: Start difference. First operand has 180 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 91 states have internal predecessors, (106), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 01:36:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:15,315 INFO L93 Difference]: Finished difference Result 356 states and 514 transitions. [2021-11-21 01:36:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:36:15,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 112 [2021-11-21 01:36:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:15,347 INFO L225 Difference]: With dead ends: 356 [2021-11-21 01:36:15,347 INFO L226 Difference]: Without dead ends: 180 [2021-11-21 01:36:15,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:15,365 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 49 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:15,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 719 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:36:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-21 01:36:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-11-21 01:36:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 92 states have internal predecessors, (105), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (82), 70 states have call predecessors, (82), 70 states have call successors, (82) [2021-11-21 01:36:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2021-11-21 01:36:15,487 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 112 [2021-11-21 01:36:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:15,488 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2021-11-21 01:36:15,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 01:36:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2021-11-21 01:36:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:36:15,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:15,502 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:15,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:15,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:36:15,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1177974957, now seen corresponding path program 1 times [2021-11-21 01:36:15,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:15,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182647646] [2021-11-21 01:36:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:15,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:15,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012333953] [2021-11-21 01:36:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:15,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:15,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:15,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:36:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:36:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-21 01:36:17,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:17,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182647646] [2021-11-21 01:36:17,049 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012333953] [2021-11-21 01:36:17,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012333953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:17,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:17,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:36:17,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643961231] [2021-11-21 01:36:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:36:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:36:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:17,055 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 01:36:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:17,664 INFO L93 Difference]: Finished difference Result 330 states and 471 transitions. [2021-11-21 01:36:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:36:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 121 [2021-11-21 01:36:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:17,669 INFO L225 Difference]: With dead ends: 330 [2021-11-21 01:36:17,670 INFO L226 Difference]: Without dead ends: 180 [2021-11-21 01:36:17,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:17,673 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 47 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:17,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 719 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:36:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-21 01:36:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-11-21 01:36:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 92 states have internal predecessors, (105), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (80), 70 states have call predecessors, (80), 70 states have call successors, (80) [2021-11-21 01:36:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 256 transitions. [2021-11-21 01:36:17,706 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 256 transitions. Word has length 121 [2021-11-21 01:36:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:17,707 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 256 transitions. [2021-11-21 01:36:17,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 01:36:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 256 transitions. [2021-11-21 01:36:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 01:36:17,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:17,711 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:17,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:17,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:17,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash 383857700, now seen corresponding path program 2 times [2021-11-21 01:36:17,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626403784] [2021-11-21 01:36:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:17,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:18,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:18,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056542347] [2021-11-21 01:36:18,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:36:18,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:18,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:18,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:36:18,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 01:36:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:36:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:36:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-21 01:36:18,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:18,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626403784] [2021-11-21 01:36:18,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056542347] [2021-11-21 01:36:18,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056542347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:18,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:18,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:36:18,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695401016] [2021-11-21 01:36:18,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:18,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:36:18,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:36:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:18,881 INFO L87 Difference]: Start difference. First operand 180 states and 256 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:36:19,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:19,356 INFO L93 Difference]: Finished difference Result 228 states and 318 transitions. [2021-11-21 01:36:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:36:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 130 [2021-11-21 01:36:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:19,374 INFO L225 Difference]: With dead ends: 228 [2021-11-21 01:36:19,374 INFO L226 Difference]: Without dead ends: 184 [2021-11-21 01:36:19,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:19,379 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:19,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 895 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:36:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-21 01:36:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-21 01:36:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 95 states have internal predecessors, (108), 71 states have call successors, (71), 17 states have call predecessors, (71), 19 states have return successors, (82), 71 states have call predecessors, (82), 70 states have call successors, (82) [2021-11-21 01:36:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 261 transitions. [2021-11-21 01:36:19,438 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 261 transitions. Word has length 130 [2021-11-21 01:36:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:19,441 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 261 transitions. [2021-11-21 01:36:19,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:36:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 261 transitions. [2021-11-21 01:36:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:36:19,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:19,444 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:19,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:36:19,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:36:19,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1075315408, now seen corresponding path program 1 times [2021-11-21 01:36:19,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:19,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338076715] [2021-11-21 01:36:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:19,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:19,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:19,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775677840] [2021-11-21 01:36:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:19,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:19,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:19,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:19,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:36:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:36:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:36:20,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:20,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:20,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338076715] [2021-11-21 01:36:20,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:20,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775677840] [2021-11-21 01:36:20,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775677840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:20,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:20,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:36:20,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756429837] [2021-11-21 01:36:20,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:20,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:36:20,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:36:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:20,858 INFO L87 Difference]: Start difference. First operand 184 states and 261 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-21 01:36:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:21,435 INFO L93 Difference]: Finished difference Result 327 states and 460 transitions. [2021-11-21 01:36:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:36:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 134 [2021-11-21 01:36:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:21,442 INFO L225 Difference]: With dead ends: 327 [2021-11-21 01:36:21,442 INFO L226 Difference]: Without dead ends: 184 [2021-11-21 01:36:21,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:36:21,451 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 82 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:21,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 845 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:36:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-21 01:36:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-21 01:36:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 95 states have internal predecessors, (108), 71 states have call successors, (71), 17 states have call predecessors, (71), 19 states have return successors, (77), 71 states have call predecessors, (77), 70 states have call successors, (77) [2021-11-21 01:36:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2021-11-21 01:36:21,496 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 134 [2021-11-21 01:36:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:21,498 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2021-11-21 01:36:21,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-21 01:36:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2021-11-21 01:36:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-21 01:36:21,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:21,507 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:21,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:21,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:21,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1509806044, now seen corresponding path program 1 times [2021-11-21 01:36:21,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:21,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278071928] [2021-11-21 01:36:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:21,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:21,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:21,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807326464] [2021-11-21 01:36:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:21,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:21,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:21,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:21,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:36:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:22,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:36:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-21 01:36:22,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:22,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278071928] [2021-11-21 01:36:22,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:22,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807326464] [2021-11-21 01:36:22,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807326464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:22,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:22,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:36:22,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611495427] [2021-11-21 01:36:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:22,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:36:22,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:36:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:22,873 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-21 01:36:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:23,947 INFO L93 Difference]: Finished difference Result 324 states and 445 transitions. [2021-11-21 01:36:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:36:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 142 [2021-11-21 01:36:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:23,950 INFO L225 Difference]: With dead ends: 324 [2021-11-21 01:36:23,950 INFO L226 Difference]: Without dead ends: 182 [2021-11-21 01:36:23,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:36:23,952 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 81 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:23,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 843 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:36:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-21 01:36:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-21 01:36:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 93 states have internal predecessors, (106), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (72), 71 states have call predecessors, (72), 70 states have call successors, (72) [2021-11-21 01:36:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 249 transitions. [2021-11-21 01:36:23,972 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 249 transitions. Word has length 142 [2021-11-21 01:36:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:23,973 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 249 transitions. [2021-11-21 01:36:23,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-21 01:36:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 249 transitions. [2021-11-21 01:36:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:36:23,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:23,977 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:24,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:24,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:24,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1199198901, now seen corresponding path program 1 times [2021-11-21 01:36:24,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:24,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680791659] [2021-11-21 01:36:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:24,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:24,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:24,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648045874] [2021-11-21 01:36:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:24,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:24,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:24,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:36:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:24,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:36:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-21 01:36:25,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:25,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680791659] [2021-11-21 01:36:25,272 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648045874] [2021-11-21 01:36:25,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648045874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:25,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:25,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:36:25,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470803978] [2021-11-21 01:36:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:25,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:36:25,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:36:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:25,276 INFO L87 Difference]: Start difference. First operand 182 states and 249 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-21 01:36:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:25,789 INFO L93 Difference]: Finished difference Result 227 states and 304 transitions. [2021-11-21 01:36:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:36:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 151 [2021-11-21 01:36:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:25,795 INFO L225 Difference]: With dead ends: 227 [2021-11-21 01:36:25,796 INFO L226 Difference]: Without dead ends: 191 [2021-11-21 01:36:25,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:36:25,798 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:25,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1124 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:36:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-21 01:36:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2021-11-21 01:36:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 94 states have (on average 1.148936170212766) internal successors, (108), 95 states have internal predecessors, (108), 71 states have call successors, (71), 17 states have call predecessors, (71), 18 states have return successors, (72), 71 states have call predecessors, (72), 70 states have call successors, (72) [2021-11-21 01:36:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 251 transitions. [2021-11-21 01:36:25,838 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 251 transitions. Word has length 151 [2021-11-21 01:36:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:25,841 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 251 transitions. [2021-11-21 01:36:25,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-21 01:36:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 251 transitions. [2021-11-21 01:36:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-21 01:36:25,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:25,846 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:25,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:26,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:26,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:26,062 INFO L85 PathProgramCache]: Analyzing trace with hash 665308537, now seen corresponding path program 1 times [2021-11-21 01:36:26,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:26,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325429421] [2021-11-21 01:36:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:26,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:26,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:26,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70781846] [2021-11-21 01:36:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:26,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:26,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c2e0e2a-013f-405d-90b5-3eded6eb611a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:36:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2834 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-21 01:36:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:26,958 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:36:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 01:36:27,875 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:36:27,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:36:27,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:27,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:36:33,498 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:36:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2021-11-21 01:36:33,538 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-21 01:36:33,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 01:36:33,578 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-21 01:36:33,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:36:38,745 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ensure_array_list_has_allocated_data_member_#t~ret580.base_6| Int) (|v_ensure_array_list_has_allocated_data_member_#t~ret580.offset_6| Int) (ensure_array_list_has_allocated_data_member_~list.offset Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (select |c_old(#memory_$Pointer$.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) ensure_array_list_has_allocated_data_member_~list.offset |v_ensure_array_list_has_allocated_data_member_#t~ret580.base_6|)) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) ensure_array_list_has_allocated_data_member_~list.offset |v_ensure_array_list_has_allocated_data_member_#t~ret580.offset_6|))))) is different from true [2021-11-21 01:36:38,813 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-21 01:36:38,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-21 01:36:38,837 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-21 01:36:38,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-21 01:36:41,460 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-21 01:36:43,521 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0)))))) is different from true [2021-11-21 01:36:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:43,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 01:36:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-21 01:36:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 172 proven. 38 refuted. 0 times theorem prover too weak. 92 trivial. 7 not checked. [2021-11-21 01:36:45,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:51,598 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_30| Int) (v_DerPreprocessor_1 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_30| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_30|) 0 v_DerPreprocessor_1)) |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.base|) (+ 32 |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.offset|)) 0)) (forall ((v_DerPreprocessor_2 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_30| Int)) (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_30| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_30|) 0 v_DerPreprocessor_2)) |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.base|) (+ 32 |c_ULTIMATE.start_aws_array_list_copy_harness_~#from~0#1.offset|)) 0))) is different from false [2021-11-21 01:36:51,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325429421] [2021-11-21 01:36:51,603 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70781846] [2021-11-21 01:36:51,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70781846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:36:51,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429209402] [2021-11-21 01:36:51,636 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-21 01:36:51,637 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:51,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:51,652 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:51,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:01,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:03,508 INFO L244 Elim1Store]: Index analysis took 2203 ms [2021-11-21 01:39:25,595 WARN L227 SmtUtils]: Spent 2.37m on a formula simplification. DAG size of input: 3151 DAG size of output: 1575 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:39:25,604 INFO L354 Elim1Store]: treesize reduction 7470, result has 25.5 percent of original size [2021-11-21 01:39:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 200 select indices, 200 select index equivalence classes, 19507 disjoint index pairs (out of 19900 index pairs), introduced 200 new quantified variables, introduced 591 case distinctions, treesize of input 1014 treesize of output 3173 [2021-11-21 01:40:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19703 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 0 case distinctions, treesize of input 995 treesize of output 1587