./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7 --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 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:06:45,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:06:45,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:06:45,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:06:45,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:06:45,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:06:45,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:06:45,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:06:45,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:06:45,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:06:45,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:06:45,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:06:45,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:06:45,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:06:45,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:06:45,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:06:45,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:06:45,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:06:45,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:06:45,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:06:45,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:06:45,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:06:45,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:06:45,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:06:45,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:06:45,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:06:45,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:06:45,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:06:45,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:06:45,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:06:45,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:06:45,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:06:45,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:06:45,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:06:45,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:06:45,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:06:45,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:06:45,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:06:45,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:06:45,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:06:45,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:06:45,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:06:45,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:06:45,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:06:45,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:06:45,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:06:45,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:06:45,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:06:45,622 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:06:45,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:06:45,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:06:45,623 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:06:45,624 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:06:45,624 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:06:45,624 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:06:45,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:06:45,625 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:06:45,625 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:06:45,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:06:45,625 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:06:45,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:06:45,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:06:45,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:06:45,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:06:45,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:06:45,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:06:45,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:06:45,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:06:45,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:06:45,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:06:45,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:06:45,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:06:45,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:06:45,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:06:45,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:06:45,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:06:45,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:06:45,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:06:45,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:06:45,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:06:45,632 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_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 [2021-11-25 18:06:45,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:06:45,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:06:45,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:06:45,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:06:45,923 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:06:45,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2021-11-25 18:06:46,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/84865a018/e00c28f4d8914eb396ffbb1707084eac/FLAG73508d080 [2021-11-25 18:06:46,797 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:06:46,799 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2021-11-25 18:06:46,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/84865a018/e00c28f4d8914eb396ffbb1707084eac/FLAG73508d080 [2021-11-25 18:06:47,350 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/84865a018/e00c28f4d8914eb396ffbb1707084eac [2021-11-25 18:06:47,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:06:47,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:06:47,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:06:47,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:06:47,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:06:47,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:06:47" (1/1) ... [2021-11-25 18:06:47,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1bd7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:47, skipping insertion in model container [2021-11-25 18:06:47,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:06:47" (1/1) ... [2021-11-25 18:06:47,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:06:47,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:06:47,875 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2021-11-25 18:06:47,885 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2021-11-25 18:06:48,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,922 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,939 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,941 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,942 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,944 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:48,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:49,458 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:06:49,459 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:06:49,460 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:06:49,462 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:06:49,463 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:06:49,464 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:06:49,465 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:06:49,465 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:06:49,466 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:06:49,467 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:06:49,701 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:06:50,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,151 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,229 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,229 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,230 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,230 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,230 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,231 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:06:50,342 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:06:50,370 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2021-11-25 18:06:50,370 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2021-11-25 18:06:50,418 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,419 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,420 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,420 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,421 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,431 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,432 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,432 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,433 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,435 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:06:50,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:06:50,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:06:50,510 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:06:50,510 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:06:50,511 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:06:50,511 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:06:50,511 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:06:50,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:06:50,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:06:50,539 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:06:50,660 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,661 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,670 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,687 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:06:50,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:06:50,992 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:06:50,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50 WrapperNode [2021-11-25 18:06:50,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:06:50,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:06:50,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:06:50,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:06:51,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,256 INFO L137 Inliner]: procedures = 775, calls = 2499, calls flagged for inlining = 69, calls inlined = 19, statements flattened = 1070 [2021-11-25 18:06:51,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:06:51,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:06:51,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:06:51,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:06:51,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:06:51,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:06:51,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:06:51,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:06:51,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (1/1) ... [2021-11-25 18:06:51,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:06:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:51,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:06:51,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:06:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-25 18:06:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 18:06:51,476 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 18:06:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:06:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-25 18:06:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-25 18:06:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:06:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:06:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-25 18:06:51,478 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-25 18:06:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:06:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:06:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:06:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:06:51,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:06:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 18:06:51,479 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 18:06:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-25 18:06:51,480 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-25 18:06:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:06:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-25 18:06:51,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-25 18:06:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:06:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 18:06:51,481 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 18:06:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:06:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-25 18:06:51,481 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-25 18:06:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-25 18:06:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-25 18:06:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-25 18:06:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-25 18:06:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-25 18:06:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-25 18:06:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-25 18:06:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-25 18:06:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:06:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-25 18:06:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-25 18:06:51,487 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-25 18:06:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 18:06:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 18:06:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-25 18:06:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-25 18:06:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-25 18:06:51,495 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-25 18:06:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-25 18:06:51,495 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-25 18:06:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:06:51,495 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:06:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-25 18:06:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-25 18:06:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:06:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 18:06:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 18:06:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-25 18:06:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-25 18:06:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-25 18:06:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-25 18:06:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2021-11-25 18:06:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2021-11-25 18:06:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-25 18:06:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-25 18:06:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2021-11-25 18:06:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2021-11-25 18:06:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 18:06:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 18:06:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:06:51,954 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:06:51,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:06:52,201 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !true; [2021-11-25 18:06:52,202 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2021-11-25 18:06:52,238 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-25 18:06:52,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-25 18:06:53,285 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !true; [2021-11-25 18:06:53,285 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !true; [2021-11-25 18:06:53,315 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:06:53,463 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:06:53,464 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-25 18:06:53,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:06:53 BoogieIcfgContainer [2021-11-25 18:06:53,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:06:53,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:06:53,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:06:53,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:06:53,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:06:47" (1/3) ... [2021-11-25 18:06:53,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527eeff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:06:53, skipping insertion in model container [2021-11-25 18:06:53,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:50" (2/3) ... [2021-11-25 18:06:53,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527eeff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:06:53, skipping insertion in model container [2021-11-25 18:06:53,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:06:53" (3/3) ... [2021-11-25 18:06:53,482 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_remove_harness.i [2021-11-25 18:06:53,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:06:53,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:06:53,553 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:06:53,567 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 [2021-11-25 18:06:53,567 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:06:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2021-11-25 18:06:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 18:06:53,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:53,614 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:53,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1987443898, now seen corresponding path program 1 times [2021-11-25 18:06:53,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:53,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991357553] [2021-11-25 18:06:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:53,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:54,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:06:54,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70964810] [2021-11-25 18:06:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:54,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:54,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:54,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:06:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:06:54,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-25 18:06:55,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:55,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991357553] [2021-11-25 18:06:55,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:06:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70964810] [2021-11-25 18:06:55,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70964810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:55,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:55,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:06:55,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905698059] [2021-11-25 18:06:55,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:06:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:06:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:55,269 INFO L87 Difference]: Start difference. First operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 18:06:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:55,847 INFO L93 Difference]: Finished difference Result 488 states and 698 transitions. [2021-11-25 18:06:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 127 [2021-11-25 18:06:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:55,876 INFO L225 Difference]: With dead ends: 488 [2021-11-25 18:06:55,877 INFO L226 Difference]: Without dead ends: 259 [2021-11-25 18:06:55,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:06:55,894 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 1 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:55,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1208 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:06:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-25 18:06:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-11-25 18:06:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 145 states have internal predecessors, (170), 87 states have call successors, (87), 27 states have call predecessors, (87), 28 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2021-11-25 18:06:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2021-11-25 18:06:56,001 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 127 [2021-11-25 18:06:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:56,003 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2021-11-25 18:06:56,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 18:06:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2021-11-25 18:06:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:06:56,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:56,018 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:56,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:56,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 18:06:56,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1602005392, now seen corresponding path program 1 times [2021-11-25 18:06:56,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:56,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050385826] [2021-11-25 18:06:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:56,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-25 18:06:56,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:56,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050385826] [2021-11-25 18:06:56,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050385826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:56,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:56,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:06:56,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93115838] [2021-11-25 18:06:56,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:56,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:06:56,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:06:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:56,760 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 18:06:57,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:57,217 INFO L93 Difference]: Finished difference Result 434 states and 584 transitions. [2021-11-25 18:06:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 131 [2021-11-25 18:06:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:57,225 INFO L225 Difference]: With dead ends: 434 [2021-11-25 18:06:57,228 INFO L226 Difference]: Without dead ends: 262 [2021-11-25 18:06:57,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:57,232 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:57,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1078 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:06:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-25 18:06:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-11-25 18:06:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 144 states have (on average 1.1875) internal successors, (171), 147 states have internal predecessors, (171), 87 states have call successors, (87), 27 states have call predecessors, (87), 29 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2021-11-25 18:06:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 351 transitions. [2021-11-25 18:06:57,265 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 351 transitions. Word has length 131 [2021-11-25 18:06:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:57,266 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 351 transitions. [2021-11-25 18:06:57,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 18:06:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 351 transitions. [2021-11-25 18:06:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 18:06:57,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:57,270 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:57,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:06:57,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2076489748, now seen corresponding path program 1 times [2021-11-25 18:06:57,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:57,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926814158] [2021-11-25 18:06:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:57,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-25 18:06:57,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926814158] [2021-11-25 18:06:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926814158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146332395] [2021-11-25 18:06:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:57,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:57,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:57,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:06:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-25 18:06:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-25 18:06:58,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-25 18:06:59,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146332395] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:59,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:06:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 15 [2021-11-25 18:06:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404273556] [2021-11-25 18:06:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:59,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:06:59,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:59,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:06:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:06:59,396 INFO L87 Difference]: Start difference. First operand 261 states and 351 transitions. Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-25 18:06:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:59,850 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2021-11-25 18:06:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:06:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 135 [2021-11-25 18:06:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:59,854 INFO L225 Difference]: With dead ends: 269 [2021-11-25 18:06:59,854 INFO L226 Difference]: Without dead ends: 267 [2021-11-25 18:06:59,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:06:59,855 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 9 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:59,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1174 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:06:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-25 18:06:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-11-25 18:06:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 147 states have (on average 1.183673469387755) internal successors, (174), 150 states have internal predecessors, (174), 87 states have call successors, (87), 28 states have call predecessors, (87), 30 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2021-11-25 18:06:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 354 transitions. [2021-11-25 18:06:59,876 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 354 transitions. Word has length 135 [2021-11-25 18:06:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:59,877 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 354 transitions. [2021-11-25 18:06:59,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-25 18:06:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 354 transitions. [2021-11-25 18:06:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 18:06:59,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:59,880 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:59,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:00,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:00,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:00,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1418729824, now seen corresponding path program 1 times [2021-11-25 18:07:00,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:00,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542321956] [2021-11-25 18:07:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:00,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-25 18:07:00,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:00,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542321956] [2021-11-25 18:07:00,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542321956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:00,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12645620] [2021-11-25 18:07:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:00,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:00,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:00,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:00,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:07:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 18:07:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 18:07:01,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:01,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12645620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:01,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:01,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-25 18:07:01,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390959327] [2021-11-25 18:07:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:01,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:07:01,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:07:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:07:01,597 INFO L87 Difference]: Start difference. First operand 265 states and 354 transitions. Second operand has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-25 18:07:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:02,085 INFO L93 Difference]: Finished difference Result 483 states and 655 transitions. [2021-11-25 18:07:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:07:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 144 [2021-11-25 18:07:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:02,088 INFO L225 Difference]: With dead ends: 483 [2021-11-25 18:07:02,088 INFO L226 Difference]: Without dead ends: 268 [2021-11-25 18:07:02,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:07:02,090 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:02,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1352 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:07:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-25 18:07:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-11-25 18:07:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 152 states have internal predecessors, (175), 87 states have call successors, (87), 28 states have call predecessors, (87), 31 states have return successors, (98), 86 states have call predecessors, (98), 85 states have call successors, (98) [2021-11-25 18:07:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 360 transitions. [2021-11-25 18:07:02,110 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 360 transitions. Word has length 144 [2021-11-25 18:07:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:02,111 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 360 transitions. [2021-11-25 18:07:02,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-25 18:07:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 360 transitions. [2021-11-25 18:07:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 18:07:02,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:02,114 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:02,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:02,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:02,330 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1291579152, now seen corresponding path program 1 times [2021-11-25 18:07:02,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:02,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739444929] [2021-11-25 18:07:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:02,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-25 18:07:02,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:02,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739444929] [2021-11-25 18:07:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739444929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:02,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763537221] [2021-11-25 18:07:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:02,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:02,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:02,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:02,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:07:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 18:07:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:03,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:07:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-25 18:07:04,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763537221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:04,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:04,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2021-11-25 18:07:04,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959744988] [2021-11-25 18:07:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:04,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:07:04,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:07:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:07:04,145 INFO L87 Difference]: Start difference. First operand 267 states and 360 transitions. Second operand has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-25 18:07:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:04,628 INFO L93 Difference]: Finished difference Result 495 states and 673 transitions. [2021-11-25 18:07:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:07:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 150 [2021-11-25 18:07:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:04,632 INFO L225 Difference]: With dead ends: 495 [2021-11-25 18:07:04,632 INFO L226 Difference]: Without dead ends: 272 [2021-11-25 18:07:04,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:07:04,634 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 45 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:04,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 2597 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 286 Invalid, 0 Unknown, 312 Unchecked, 0.4s Time] [2021-11-25 18:07:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-25 18:07:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-11-25 18:07:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 155 states have internal predecessors, (179), 88 states have call successors, (88), 30 states have call predecessors, (88), 31 states have return successors, (99), 86 states have call predecessors, (99), 86 states have call successors, (99) [2021-11-25 18:07:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 366 transitions. [2021-11-25 18:07:04,669 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 366 transitions. Word has length 150 [2021-11-25 18:07:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:04,669 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 366 transitions. [2021-11-25 18:07:04,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-25 18:07:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 366 transitions. [2021-11-25 18:07:04,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 18:07:04,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:04,672 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:04,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:04,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:04,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2902764, now seen corresponding path program 1 times [2021-11-25 18:07:04,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:04,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186854749] [2021-11-25 18:07:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:04,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-25 18:07:05,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186854749] [2021-11-25 18:07:05,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186854749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616830508] [2021-11-25 18:07:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:05,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:05,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:05,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:07:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 18:07:06,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-25 18:07:06,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:06,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616830508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:06,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:06,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2021-11-25 18:07:06,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794335818] [2021-11-25 18:07:06,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:06,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:07:06,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:07:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:07:06,787 INFO L87 Difference]: Start difference. First operand 272 states and 366 transitions. Second operand has 7 states, 3 states have (on average 21.666666666666668) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-25 18:07:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:07,368 INFO L93 Difference]: Finished difference Result 467 states and 636 transitions. [2021-11-25 18:07:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:07:07,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 3 states have (on average 21.666666666666668) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) Word has length 154 [2021-11-25 18:07:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:07,372 INFO L225 Difference]: With dead ends: 467 [2021-11-25 18:07:07,372 INFO L226 Difference]: Without dead ends: 273 [2021-11-25 18:07:07,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:07:07,374 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 32 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:07,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1330 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:07:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-25 18:07:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2021-11-25 18:07:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 155 states have internal predecessors, (179), 88 states have call successors, (88), 30 states have call predecessors, (88), 31 states have return successors, (98), 86 states have call predecessors, (98), 86 states have call successors, (98) [2021-11-25 18:07:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 365 transitions. [2021-11-25 18:07:07,398 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 365 transitions. Word has length 154 [2021-11-25 18:07:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:07,399 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 365 transitions. [2021-11-25 18:07:07,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 3 states have (on average 21.666666666666668) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-25 18:07:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 365 transitions. [2021-11-25 18:07:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-25 18:07:07,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:07,403 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:07,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:07,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:07,626 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1383303716, now seen corresponding path program 2 times [2021-11-25 18:07:07,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:07,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611175183] [2021-11-25 18:07:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:07,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-25 18:07:08,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:08,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611175183] [2021-11-25 18:07:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611175183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:08,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453285758] [2021-11-25 18:07:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:07:08,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:08,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:08,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:07:08,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:07:08,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:07:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:07:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:07:09,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:07:09,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453285758] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:09,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:07:09,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 8] total 22 [2021-11-25 18:07:09,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559335255] [2021-11-25 18:07:09,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:09,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:09,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:09,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:09,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:07:09,758 INFO L87 Difference]: Start difference. First operand 272 states and 365 transitions. Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 1 states have call predecessors, (34), 1 states have call successors, (34) [2021-11-25 18:07:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:10,090 INFO L93 Difference]: Finished difference Result 280 states and 372 transitions. [2021-11-25 18:07:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:07:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 1 states have call predecessors, (34), 1 states have call successors, (34) Word has length 160 [2021-11-25 18:07:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:10,095 INFO L225 Difference]: With dead ends: 280 [2021-11-25 18:07:10,095 INFO L226 Difference]: Without dead ends: 278 [2021-11-25 18:07:10,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:07:10,097 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 6 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:10,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1180 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:07:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-25 18:07:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2021-11-25 18:07:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 158 states have internal predecessors, (182), 88 states have call successors, (88), 31 states have call predecessors, (88), 32 states have return successors, (98), 86 states have call predecessors, (98), 86 states have call successors, (98) [2021-11-25 18:07:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 368 transitions. [2021-11-25 18:07:10,114 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 368 transitions. Word has length 160 [2021-11-25 18:07:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:10,115 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 368 transitions. [2021-11-25 18:07:10,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 1 states have call predecessors, (34), 1 states have call successors, (34) [2021-11-25 18:07:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 368 transitions. [2021-11-25 18:07:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-25 18:07:10,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:10,119 INFO L514 BasicCegarLoop]: trace histogram [15, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:10,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:07:10,346 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash -843607275, now seen corresponding path program 1 times [2021-11-25 18:07:10,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:10,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639195075] [2021-11-25 18:07:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:10,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-25 18:07:10,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639195075] [2021-11-25 18:07:10,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639195075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:10,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966909048] [2021-11-25 18:07:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:10,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:10,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:10,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:10,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:07:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:11,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:07:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-25 18:07:13,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:13,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966909048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:13,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:13,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2021-11-25 18:07:13,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305184788] [2021-11-25 18:07:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:07:13,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:07:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:07:13,267 INFO L87 Difference]: Start difference. First operand 276 states and 368 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-25 18:07:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:13,653 INFO L93 Difference]: Finished difference Result 478 states and 649 transitions. [2021-11-25 18:07:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:07:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 4 states have call successors, (37) Word has length 166 [2021-11-25 18:07:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:13,657 INFO L225 Difference]: With dead ends: 478 [2021-11-25 18:07:13,657 INFO L226 Difference]: Without dead ends: 278 [2021-11-25 18:07:13,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:07:13,659 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 36 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:13,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1317 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2021-11-25 18:07:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-25 18:07:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2021-11-25 18:07:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 157 states have internal predecessors, (182), 87 states have call successors, (87), 31 states have call predecessors, (87), 32 states have return successors, (96), 86 states have call predecessors, (96), 85 states have call successors, (96) [2021-11-25 18:07:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 365 transitions. [2021-11-25 18:07:13,685 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 365 transitions. Word has length 166 [2021-11-25 18:07:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:13,685 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 365 transitions. [2021-11-25 18:07:13,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-25 18:07:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 365 transitions. [2021-11-25 18:07:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-25 18:07:13,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:13,714 INFO L514 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:13,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:13,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:13,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash -127629287, now seen corresponding path program 1 times [2021-11-25 18:07:13,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:13,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445499498] [2021-11-25 18:07:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:13,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-25 18:07:14,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445499498] [2021-11-25 18:07:14,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445499498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403045690] [2021-11-25 18:07:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:14,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:14,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:14,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:07:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 3132 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:07:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:16,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:07:16,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:07:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-25 18:07:16,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-25 18:07:17,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 18:07:17,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2021-11-25 18:07:17,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2021-11-25 18:07:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-25 18:07:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403045690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681336583] [2021-11-25 18:07:18,095 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2021-11-25 18:07:18,095 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:07:18,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:07:18,107 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:07:18,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:07:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:07:21,263 INFO L244 Elim1Store]: Index analysis took 376 ms [2021-11-25 18:07:38,223 WARN L227 SmtUtils]: Spent 16.88s on a formula simplification. DAG size of input: 1767 DAG size of output: 1179 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 18:07:38,229 INFO L354 Elim1Store]: treesize reduction 1960, result has 47.4 percent of original size [2021-11-25 18:07:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19308 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 196 case distinctions, treesize of input 992 treesize of output 2366 [2021-11-25 18:07:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:07:41,705 INFO L244 Elim1Store]: Index analysis took 980 ms [2021-11-25 18:08:10,349 WARN L227 SmtUtils]: Spent 28.55s on a formula simplification. DAG size of input: 2161 DAG size of output: 1179 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 18:08:10,353 INFO L354 Elim1Store]: treesize reduction 3528, result has 33.3 percent of original size [2021-11-25 18:08:10,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 199 select indices, 199 select index equivalence classes, 19505 disjoint index pairs (out of 19701 index pairs), introduced 199 new quantified variables, introduced 392 case distinctions, treesize of input 1002 treesize of output 2377 [2021-11-25 18:08:12,081 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 196 [2021-11-25 18:08:12,197 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 196 [2021-11-25 18:08:12,391 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 196 [2021-11-25 18:08:13,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:13,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:13,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:13,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:13,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:13,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:13,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,387 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:08:13,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:08:13,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:13,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2021-11-25 18:08:14,120 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 196 [2021-11-25 18:08:14,250 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 196 [2021-11-25 18:08:14,329 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 57 for LOIs [2021-11-25 18:08:14,337 INFO L197 IcfgInterpreter]: Interpreting procedure hash_table_state_required_bytes with input of size 120 for LOIs [2021-11-25 18:08:14,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:08:14,475 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:08:14,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:08:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:08:14,631 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:08:14,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:08:14,829 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:08:14,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:08:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:08:14,985 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:08:14,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:08:14,997 INFO L197 IcfgInterpreter]: Interpreting procedure aws_mul_size_checked with input of size 135 for LOIs [2021-11-25 18:08:15,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:15,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:15,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:15,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:16,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:16,078 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_mult with input of size 119 for LOIs [2021-11-25 18:08:16,127 INFO L197 IcfgInterpreter]: Interpreting procedure aws_raise_error with input of size 75 for LOIs [2021-11-25 18:08:16,155 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_power_of_two with input of size 76 for LOIs [2021-11-25 18:08:16,180 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 54 for LOIs [2021-11-25 18:08:16,188 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:26,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1681336583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:26,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:26,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [13, 13, 12] total 51 [2021-11-25 18:08:26,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872205059] [2021-11-25 18:08:26,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:26,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:08:26,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:08:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2374, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:08:26,773 INFO L87 Difference]: Start difference. First operand 275 states and 365 transitions. Second operand has 27 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 9 states have call successors, (36), 8 states have call predecessors, (36), 8 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-11-25 18:08:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:27,106 INFO L93 Difference]: Finished difference Result 520 states and 688 transitions. [2021-11-25 18:08:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 18:08:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 9 states have call successors, (36), 8 states have call predecessors, (36), 8 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 170 [2021-11-25 18:08:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:27,111 INFO L225 Difference]: With dead ends: 520 [2021-11-25 18:08:27,111 INFO L226 Difference]: Without dead ends: 283 [2021-11-25 18:08:27,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 467 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=176, Invalid=2374, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:08:27,116 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 5 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2172 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 2129 Unchecked, 0.3s Time] [2021-11-25 18:08:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-25 18:08:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2021-11-25 18:08:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 158 states have internal predecessors, (182), 87 states have call successors, (87), 35 states have call predecessors, (87), 35 states have return successors, (95), 85 states have call predecessors, (95), 85 states have call successors, (95) [2021-11-25 18:08:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 364 transitions. [2021-11-25 18:08:27,141 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 364 transitions. Word has length 170 [2021-11-25 18:08:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:27,141 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 364 transitions. [2021-11-25 18:08:27,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 9 states have call successors, (36), 8 states have call predecessors, (36), 8 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-11-25 18:08:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 364 transitions. [2021-11-25 18:08:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 18:08:27,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:27,145 INFO L514 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:27,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:27,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:27,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1799534640, now seen corresponding path program 1 times [2021-11-25 18:08:27,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:27,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901421123] [2021-11-25 18:08:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:27,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:27,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:27,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114899175] [2021-11-25 18:08:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:27,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:27,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:27,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:08:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 3232 conjuncts, 139 conjunts are in the unsatisfiable core [2021-11-25 18:08:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:28,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:29,490 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:08:29,491 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-11-25 18:08:29,722 INFO L354 Elim1Store]: treesize reduction 102, result has 17.1 percent of original size [2021-11-25 18:08:29,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 228 treesize of output 189 [2021-11-25 18:08:29,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2021-11-25 18:08:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,804 INFO L354 Elim1Store]: treesize reduction 38, result has 55.3 percent of original size [2021-11-25 18:08:29,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 173 [2021-11-25 18:08:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,891 INFO L354 Elim1Store]: treesize reduction 90, result has 42.7 percent of original size [2021-11-25 18:08:29,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 214 [2021-11-25 18:08:29,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,944 INFO L354 Elim1Store]: treesize reduction 44, result has 41.3 percent of original size [2021-11-25 18:08:29,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 132 [2021-11-25 18:08:29,976 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-11-25 18:08:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 77 treesize of output 88 [2021-11-25 18:08:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 232 [2021-11-25 18:08:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 101 [2021-11-25 18:08:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 18:08:30,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 18:08:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:30,425 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 0 case distinctions, treesize of input 35 treesize of output 26 [2021-11-25 18:08:30,590 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:30,590 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 46 treesize of output 40 [2021-11-25 18:08:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:33,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 461 treesize of output 531 [2021-11-25 18:08:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:33,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 50 [2021-11-25 18:08:44,385 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:08:44,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 60 [2021-11-25 18:08:44,682 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-25 18:08:44,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 75 [2021-11-25 18:08:44,946 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-25 18:08:44,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 18:08:48,510 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-25 18:08:48,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 26 [2021-11-25 18:08:48,626 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:08:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 53 [2021-11-25 18:08:52,067 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-25 18:08:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-11-25 18:08:52,302 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-25 18:08:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2021-11-25 18:08:53,324 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:08:53,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 103 [2021-11-25 18:08:54,422 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-25 18:08:54,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2021-11-25 18:08:55,033 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:08:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 31 [2021-11-25 18:08:55,112 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:08:55,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 39 [2021-11-25 18:08:55,317 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:08:55,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2021-11-25 18:08:55,356 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:08:55,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 35 [2021-11-25 18:08:58,860 INFO L354 Elim1Store]: treesize reduction 26, result has 29.7 percent of original size [2021-11-25 18:08:58,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 52 [2021-11-25 18:08:59,025 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:08:59,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 34 [2021-11-25 18:08:59,275 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:08:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 38 [2021-11-25 18:08:59,409 INFO L354 Elim1Store]: treesize reduction 26, result has 29.7 percent of original size [2021-11-25 18:08:59,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 56 [2021-11-25 18:08:59,664 INFO L354 Elim1Store]: treesize reduction 26, result has 29.7 percent of original size [2021-11-25 18:08:59,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 49 [2021-11-25 18:08:59,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:09:00,051 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 60 [2021-11-25 18:09:00,113 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-25 18:09:00,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2021-11-25 18:09:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 57 [2021-11-25 18:09:01,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2021-11-25 18:09:01,225 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:01,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 39 [2021-11-25 18:09:01,467 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:01,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2021-11-25 18:09:01,781 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-25 18:09:01,843 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:01,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 70 [2021-11-25 18:09:07,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:07,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 77 [2021-11-25 18:09:07,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 92 [2021-11-25 18:09:07,697 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-25 18:09:07,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 42 [2021-11-25 18:09:07,734 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:07,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 64 [2021-11-25 18:09:07,767 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:07,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2021-11-25 18:09:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:09:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:07,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-11-25 18:09:07,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:07,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901421123] [2021-11-25 18:09:07,935 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:09:07,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114899175] [2021-11-25 18:09:07,935 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-25 18:09:07,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347447890] [2021-11-25 18:09:07,940 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2021-11-25 18:09:07,941 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:07,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:07,942 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:07,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:09,956 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@777acb61 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:401) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:154) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:90) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:09:09,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:09,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 18:09:09,959 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-25 18:09:09,960 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 18:09:09,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:09:10,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:10,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:09:10,202 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:10,204 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:09:10,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:09:10 BoogieIcfgContainer [2021-11-25 18:09:10,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:09:10,252 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:09:10,252 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:09:10,252 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:09:10,253 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:06:53" (3/4) ... [2021-11-25 18:09:10,256 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:09:10,256 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:09:10,257 INFO L158 Benchmark]: Toolchain (without parser) took 142901.39ms. Allocated memory was 94.4MB in the beginning and 903.9MB in the end (delta: 809.5MB). Free memory was 49.9MB in the beginning and 269.9MB in the end (delta: -220.0MB). Peak memory consumption was 589.5MB. Max. memory is 16.1GB. [2021-11-25 18:09:10,257 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 94.4MB. Free memory was 65.5MB in the beginning and 65.4MB in the end (delta: 25.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:09:10,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3636.65ms. Allocated memory was 94.4MB in the beginning and 178.3MB in the end (delta: 83.9MB). Free memory was 49.6MB in the beginning and 86.2MB in the end (delta: -36.6MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. [2021-11-25 18:09:10,258 INFO L158 Benchmark]: Boogie Procedure Inliner took 262.60ms. Allocated memory is still 178.3MB. Free memory was 86.2MB in the beginning and 117.4MB in the end (delta: -31.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-25 18:09:10,258 INFO L158 Benchmark]: Boogie Preprocessor took 136.69ms. Allocated memory is still 178.3MB. Free memory was 117.4MB in the beginning and 109.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:09:10,258 INFO L158 Benchmark]: RCFGBuilder took 2074.06ms. Allocated memory is still 178.3MB. Free memory was 109.0MB in the beginning and 73.0MB in the end (delta: 36.0MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. [2021-11-25 18:09:10,259 INFO L158 Benchmark]: TraceAbstraction took 136780.27ms. Allocated memory was 178.3MB in the beginning and 903.9MB in the end (delta: 725.6MB). Free memory was 73.0MB in the beginning and 269.9MB in the end (delta: -196.8MB). Peak memory consumption was 535.1MB. Max. memory is 16.1GB. [2021-11-25 18:09:10,259 INFO L158 Benchmark]: Witness Printer took 4.23ms. Allocated memory is still 903.9MB. Free memory is still 269.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:09:10,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 94.4MB. Free memory was 65.5MB in the beginning and 65.4MB in the end (delta: 25.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3636.65ms. Allocated memory was 94.4MB in the beginning and 178.3MB in the end (delta: 83.9MB). Free memory was 49.6MB in the beginning and 86.2MB in the end (delta: -36.6MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 262.60ms. Allocated memory is still 178.3MB. Free memory was 86.2MB in the beginning and 117.4MB in the end (delta: -31.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 136.69ms. Allocated memory is still 178.3MB. Free memory was 117.4MB in the beginning and 109.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2074.06ms. Allocated memory is still 178.3MB. Free memory was 109.0MB in the beginning and 73.0MB in the end (delta: 36.0MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. * TraceAbstraction took 136780.27ms. Allocated memory was 178.3MB in the beginning and 903.9MB in the end (delta: 725.6MB). Free memory was 73.0MB in the beginning and 269.9MB in the end (delta: -196.8MB). Peak memory consumption was 535.1MB. Max. memory is 16.1GB. * Witness Printer took 4.23ms. Allocated memory is still 903.9MB. Free memory is still 269.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 223]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of large string literal at line 7593, overapproximation of __builtin_uaddl_overflow at line 250, overapproximation of bitwiseAnd at line 9327, overapproximation of __builtin_umull_overflow at line 255, overapproximation of someBinaryDOUBLEComparisonOperation at line 10057. Possible FailurePath: [L6927-L6932] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7379] static __thread int tl_last_error = 0; [L7592-L7740] static struct aws_error_info errors[] = { [(AWS_ERROR_SUCCESS)-0x0000] = { .literal_name = "AWS_ERROR_SUCCESS", .error_code = (AWS_ERROR_SUCCESS), .error_str = ("Success."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SUCCESS" ", " "Success.", } , [(AWS_ERROR_OOM)-0x0000] = { .literal_name = "AWS_ERROR_OOM", .error_code = (AWS_ERROR_OOM), .error_str = ("Out of memory."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_OOM" ", " "Out of memory.", } , [(AWS_ERROR_UNKNOWN)-0x0000] = { .literal_name = "AWS_ERROR_UNKNOWN", .error_code = (AWS_ERROR_UNKNOWN), .error_str = ("Unknown error."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNKNOWN" ", " "Unknown error.", } , [(AWS_ERROR_SHORT_BUFFER)-0x0000] = { .literal_name = "AWS_ERROR_SHORT_BUFFER", .error_code = (AWS_ERROR_SHORT_BUFFER), .error_str = ("Buffer is not large enough to hold result."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SHORT_BUFFER" ", " "Buffer is not large enough to hold result.", } , [(AWS_ERROR_OVERFLOW_DETECTED)-0x0000] = { .literal_name = "AWS_ERROR_OVERFLOW_DETECTED", .error_code = (AWS_ERROR_OVERFLOW_DETECTED), .error_str = ("Fixed size value overflow was detected."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_OVERFLOW_DETECTED" ", " "Fixed size value overflow was detected.", } , [(AWS_ERROR_UNSUPPORTED_OPERATION)-0x0000] = { .literal_name = "AWS_ERROR_UNSUPPORTED_OPERATION", .error_code = (AWS_ERROR_UNSUPPORTED_OPERATION), .error_str = ("Unsupported operation."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNSUPPORTED_OPERATION" ", " "Unsupported operation.", } , [(AWS_ERROR_INVALID_BUFFER_SIZE)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_BUFFER_SIZE", .error_code = (AWS_ERROR_INVALID_BUFFER_SIZE), .error_str = ("Invalid buffer size."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_BUFFER_SIZE" ", " "Invalid buffer size.", } , [(AWS_ERROR_INVALID_HEX_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_HEX_STR", .error_code = (AWS_ERROR_INVALID_HEX_STR), .error_str = ("Invalid hex string."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_HEX_STR" ", " "Invalid hex string.", } , [(AWS_ERROR_INVALID_BASE64_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_BASE64_STR", .error_code = (AWS_ERROR_INVALID_BASE64_STR), .error_str = ("Invalid base64 string."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_BASE64_STR" ", " "Invalid base64 string.", } , [(AWS_ERROR_INVALID_INDEX)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_INDEX", .error_code = (AWS_ERROR_INVALID_INDEX), .error_str = ("Invalid index for list access."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_INDEX" ", " "Invalid index for list access.", } , [(AWS_ERROR_THREAD_INVALID_SETTINGS)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_INVALID_SETTINGS", .error_code = (AWS_ERROR_THREAD_INVALID_SETTINGS), .error_str = ("Invalid thread settings."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_INVALID_SETTINGS" ", " "Invalid thread settings.", } , [(AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE", .error_code = (AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE), .error_str = ("Insufficent resources for thread."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE" ", " "Insufficent resources for thread.", } , [(AWS_ERROR_THREAD_NO_PERMISSIONS)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NO_PERMISSIONS", .error_code = (AWS_ERROR_THREAD_NO_PERMISSIONS), .error_str = ("Insufficient permissions for thread operation."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NO_PERMISSIONS" ", " "Insufficient permissions for thread operation.", } , [(AWS_ERROR_THREAD_NOT_JOINABLE)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NOT_JOINABLE", .error_code = (AWS_ERROR_THREAD_NOT_JOINABLE), .error_str = ("Thread not joinable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NOT_JOINABLE" ", " "Thread not joinable.", } , [(AWS_ERROR_THREAD_NO_SUCH_THREAD_ID)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NO_SUCH_THREAD_ID", .error_code = (AWS_ERROR_THREAD_NO_SUCH_THREAD_ID), .error_str = ("No such thread ID."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NO_SUCH_THREAD_ID" ", " "No such thread ID.", } , [(AWS_ERROR_THREAD_DEADLOCK_DETECTED)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_DEADLOCK_DETECTED", .error_code = (AWS_ERROR_THREAD_DEADLOCK_DETECTED), .error_str = ("Deadlock detected in thread."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_DEADLOCK_DETECTED" ", " "Deadlock detected in thread.", } , [(AWS_ERROR_MUTEX_NOT_INIT)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_NOT_INIT", .error_code = (AWS_ERROR_MUTEX_NOT_INIT), .error_str = ("Mutex not initialized."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_NOT_INIT" ", " "Mutex not initialized.", } , [(AWS_ERROR_MUTEX_TIMEOUT)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_TIMEOUT", .error_code = (AWS_ERROR_MUTEX_TIMEOUT), .error_str = ("Mutex operation timed out."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_TIMEOUT" ", " "Mutex operation timed out.", } , [(AWS_ERROR_MUTEX_CALLER_NOT_OWNER)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_CALLER_NOT_OWNER", .error_code = (AWS_ERROR_MUTEX_CALLER_NOT_OWNER), .error_str = ("The caller of a mutex operation was not the owner."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_CALLER_NOT_OWNER" ", " "The caller of a mutex operation was not the owner.", } , [(AWS_ERROR_MUTEX_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_FAILED", .error_code = (AWS_ERROR_MUTEX_FAILED), .error_str = ("Mutex operation failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_FAILED" ", " "Mutex operation failed.", } , [(AWS_ERROR_COND_VARIABLE_INIT_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_INIT_FAILED", .error_code = (AWS_ERROR_COND_VARIABLE_INIT_FAILED), .error_str = ("Condition variable initialization failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_INIT_FAILED" ", " "Condition variable initialization failed.", } , [(AWS_ERROR_COND_VARIABLE_TIMED_OUT)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_TIMED_OUT", .error_code = (AWS_ERROR_COND_VARIABLE_TIMED_OUT), .error_str = ("Condition variable wait timed out."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_TIMED_OUT" ", " "Condition variable wait timed out.", } , [(AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN", .error_code = (AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN), .error_str = ("Condition variable unknown error."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN" ", " "Condition variable unknown error.", } , [(AWS_ERROR_CLOCK_FAILURE)-0x0000] = { .literal_name = "AWS_ERROR_CLOCK_FAILURE", .error_code = (AWS_ERROR_CLOCK_FAILURE), .error_str = ("Clock operation failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_CLOCK_FAILURE" ", " "Clock operation failed.", } , [(AWS_ERROR_LIST_EMPTY)-0x0000] = { .literal_name = "AWS_ERROR_LIST_EMPTY", .error_code = (AWS_ERROR_LIST_EMPTY), .error_str = ("Empty list."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_EMPTY" ", " "Empty list.", } , [(AWS_ERROR_DEST_COPY_TOO_SMALL)-0x0000] = { .literal_name = "AWS_ERROR_DEST_COPY_TOO_SMALL", .error_code = (AWS_ERROR_DEST_COPY_TOO_SMALL), .error_str = ("Destination of copy is too small."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_DEST_COPY_TOO_SMALL" ", " "Destination of copy is too small.", } , [(AWS_ERROR_LIST_EXCEEDS_MAX_SIZE)-0x0000] = { .literal_name = "AWS_ERROR_LIST_EXCEEDS_MAX_SIZE", .error_code = (AWS_ERROR_LIST_EXCEEDS_MAX_SIZE), .error_str = ("A requested operation on a list would exceed it's max size."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_EXCEEDS_MAX_SIZE" ", " "A requested operation on a list would exceed it's max size.", } , [(AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK)-0x0000] = { .literal_name = "AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK", .error_code = (AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK), .error_str = ("Attempt to shrink a list in static mode."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK" ", " "Attempt to shrink a list in static mode.", } , [(AWS_ERROR_PRIORITY_QUEUE_FULL)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_FULL", .error_code = (AWS_ERROR_PRIORITY_QUEUE_FULL), .error_str = ("Attempt to add items to a full preallocated queue in static mode."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_FULL" ", " "Attempt to add items to a full preallocated queue in static mode.", } , [(AWS_ERROR_PRIORITY_QUEUE_EMPTY)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_EMPTY", .error_code = (AWS_ERROR_PRIORITY_QUEUE_EMPTY), .error_str = ("Attempt to pop an item from an empty queue."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_EMPTY" ", " "Attempt to pop an item from an empty queue.", } , [(AWS_ERROR_PRIORITY_QUEUE_BAD_NODE)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_BAD_NODE", .error_code = (AWS_ERROR_PRIORITY_QUEUE_BAD_NODE), .error_str = ("Bad node handle passed to remove."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_BAD_NODE" ", " "Bad node handle passed to remove.", } , [(AWS_ERROR_HASHTBL_ITEM_NOT_FOUND)-0x0000] = { .literal_name = "AWS_ERROR_HASHTBL_ITEM_NOT_FOUND", .error_code = (AWS_ERROR_HASHTBL_ITEM_NOT_FOUND), .error_str = ("Item not found in hash table."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_HASHTBL_ITEM_NOT_FOUND" ", " "Item not found in hash table.", } , [(AWS_ERROR_INVALID_DATE_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_DATE_STR", .error_code = (AWS_ERROR_INVALID_DATE_STR), .error_str = ("Date string is invalid and cannot be parsed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_DATE_STR" ", " "Date string is invalid and cannot be parsed.", } , [(AWS_ERROR_INVALID_ARGUMENT)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_ARGUMENT", .error_code = (AWS_ERROR_INVALID_ARGUMENT), .error_str = ("An invalid argument was passed to a function."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_ARGUMENT" ", " "An invalid argument was passed to a function.", } , [(AWS_ERROR_RANDOM_GEN_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_RANDOM_GEN_FAILED", .error_code = (AWS_ERROR_RANDOM_GEN_FAILED), .error_str = ("A call to the random number generator failed. Retry later."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_RANDOM_GEN_FAILED" ", " "A call to the random number generator failed. Retry later.", } , [(AWS_ERROR_MALFORMED_INPUT_STRING)-0x0000] = { .literal_name = "AWS_ERROR_MALFORMED_INPUT_STRING", .error_code = (AWS_ERROR_MALFORMED_INPUT_STRING), .error_str = ("An input string was passed to a parser and the string was incorrectly formatted."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MALFORMED_INPUT_STRING" ", " "An input string was passed to a parser and the string was incorrectly formatted.", } , [(AWS_ERROR_UNIMPLEMENTED)-0x0000] = { .literal_name = "AWS_ERROR_UNIMPLEMENTED", .error_code = (AWS_ERROR_UNIMPLEMENTED), .error_str = ("A function was called, but is not implemented."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNIMPLEMENTED" ", " "A function was called, but is not implemented.", } , [(AWS_ERROR_INVALID_STATE)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_STATE", .error_code = (AWS_ERROR_INVALID_STATE), .error_str = ("An invalid state was encountered."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_STATE" ", " "An invalid state was encountered.", } , [(AWS_ERROR_ENVIRONMENT_GET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_GET", .error_code = (AWS_ERROR_ENVIRONMENT_GET), .error_str = ("System call failure when getting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_GET" ", " "System call failure when getting an environment variable.", } , [(AWS_ERROR_ENVIRONMENT_SET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_SET", .error_code = (AWS_ERROR_ENVIRONMENT_SET), .error_str = ("System call failure when setting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_SET" ", " "System call failure when setting an environment variable.", } , [(AWS_ERROR_ENVIRONMENT_UNSET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_UNSET", .error_code = (AWS_ERROR_ENVIRONMENT_UNSET), .error_str = ("System call failure when unsetting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_UNSET" ", " "System call failure when unsetting an environment variable.", } , [(AWS_ERROR_SYS_CALL_FAILURE)-0x0000] = { .literal_name = "AWS_ERROR_SYS_CALL_FAILURE", .error_code = (AWS_ERROR_SYS_CALL_FAILURE), .error_str = ("System call failure"), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SYS_CALL_FAILURE" ", " "System call failure", } , [(AWS_ERROR_FILE_INVALID_PATH)-0x0000] = { .literal_name = "AWS_ERROR_FILE_INVALID_PATH", .error_code = (AWS_ERROR_FILE_INVALID_PATH), .error_str = ("Invalid file path."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_FILE_INVALID_PATH" ", " "Invalid file path.", } , [(AWS_ERROR_MAX_FDS_EXCEEDED)-0x0000] = { .literal_name = "AWS_ERROR_MAX_FDS_EXCEEDED", .error_code = (AWS_ERROR_MAX_FDS_EXCEEDED), .error_str = ("The maximum number of fds has been exceeded."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MAX_FDS_EXCEEDED" ", " "The maximum number of fds has been exceeded.", } , [(AWS_ERROR_NO_PERMISSION)-0x0000] = { .literal_name = "AWS_ERROR_NO_PERMISSION", .error_code = (AWS_ERROR_NO_PERMISSION), .error_str = ("User does not have permission to perform the requested action."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_NO_PERMISSION" ", " "User does not have permission to perform the requested action.", } , [(AWS_ERROR_STREAM_UNSEEKABLE)-0x0000] = { .literal_name = "AWS_ERROR_STREAM_UNSEEKABLE", .error_code = (AWS_ERROR_STREAM_UNSEEKABLE), .error_str = ("Stream does not support seek operations"), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_STREAM_UNSEEKABLE" ", " "Stream does not support seek operations", } , }; [L7743-L7746] static struct aws_error_info_list s_list = { .error_list = errors, .count = (sizeof(errors) / sizeof((errors)[0])), }; [L7748-L7757] static struct aws_log_subject_info s_common_log_subject_infos[] = { { .subject_id = (AWS_LS_COMMON_GENERAL), .subject_name = ("aws-c-common"), .subject_description = ("Subject for aws-c-common logging that doesn't belong to any particular category") } , { .subject_id = (AWS_LS_COMMON_TASK_SCHEDULER), .subject_name = ("task-scheduler"), .subject_description = ("Subject for task scheduler or task specific logging.") } , }; [L7759-L7762] static struct aws_log_subject_info_list s_common_log_subject_list = { .subject_list = s_common_log_subject_infos, .count = (sizeof(s_common_log_subject_infos) / sizeof((s_common_log_subject_infos)[0])), }; [L7764-L7768] static _Bool s_common_library_initialized = 0 ; [L10187] CALL aws_hash_table_remove_harness() [L10133] struct aws_hash_table map; [L10134] CALL ensure_allocated_hash_table(&map, 4) [L6810] CALL, EXPR nondet_uint64_t() [L266] return __VERIFIER_nondet_ulong(); [L6810] RET, EXPR nondet_uint64_t() [L6810] size_t num_entries = nondet_uint64_t(); [L6811] CALL assume_abort_if_not(num_entries <= max_table_entries) [L211] COND FALSE !(!cond) [L6811] RET assume_abort_if_not(num_entries <= max_table_entries) [L6812] CALL, EXPR aws_is_power_of_two(num_entries) [L2630] return x && (!(x & (x - 1))); [L6812] RET, EXPR aws_is_power_of_two(num_entries) [L6812] CALL assume_abort_if_not(aws_is_power_of_two(num_entries)) [L211] COND FALSE !(!cond) [L6812] RET assume_abort_if_not(aws_is_power_of_two(num_entries)) [L6814] size_t required_bytes; [L6815] CALL, EXPR hash_table_state_required_bytes(num_entries, &required_bytes) [L10121] size_t elemsize; [L10122] CALL aws_mul_size_checked(size, sizeof(struct hash_table_entry), &elemsize) [L2590] CALL, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2498] CALL __CPROVER_overflow_mult(a, b) [L254] unsigned long c; [L255] return __builtin_umull_overflow(a, b, &c); [L255] return __builtin_umull_overflow(a, b, &c); [L2498] RET __CPROVER_overflow_mult(a, b) [L2498] COND FALSE !(__CPROVER_overflow_mult(a, b)) [L2500] *r = a * b [L2501] return (0); [L2590] RET, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2590] return aws_mul_u64_checked(a, b, (uint64_t *)r); [L10122] RET aws_mul_size_checked(size, sizeof(struct hash_table_entry), &elemsize) [L10122] COND FALSE !(aws_mul_size_checked(size, sizeof(struct hash_table_entry), &elemsize)) [L10126] EXPR \read(elemsize) [L10126] CALL aws_add_size_checked(elemsize, sizeof(struct hash_table_state), required_bytes) [L2617] CALL, EXPR aws_add_u64_checked(a, b, (uint64_t *)r) [L2542] CALL __CPROVER_overflow_plus(a, b) [L249] unsigned long c; [L250] return __builtin_uaddl_overflow(a, b, &c); [L250] return __builtin_uaddl_overflow(a, b, &c); [L2542] RET __CPROVER_overflow_plus(a, b) [L2542] COND FALSE !(__CPROVER_overflow_plus(a, b)) [L2544] *r = a + b [L2545] return (0); [L2617] RET, EXPR aws_add_u64_checked(a, b, (uint64_t *)r) [L2617] return aws_add_u64_checked(a, b, (uint64_t *)r); [L10126] RET aws_add_size_checked(elemsize, sizeof(struct hash_table_state), required_bytes) [L10126] COND FALSE !(aws_add_size_checked(elemsize, sizeof(struct hash_table_state), required_bytes)) [L10130] return (0); [L10130] return (0); [L6815] RET, EXPR hash_table_state_required_bytes(num_entries, &required_bytes) [L6815] CALL assume_abort_if_not(!hash_table_state_required_bytes(num_entries, &required_bytes)) [L211] COND FALSE !(!cond) [L6815] RET assume_abort_if_not(!hash_table_state_required_bytes(num_entries, &required_bytes)) [L6816] EXPR \read(required_bytes) [L6816] CALL, EXPR bounded_malloc(required_bytes) [L6944-L6946] CALL assume_abort_if_not(size <= ( (18446744073709551615UL) >> (8 + 1))) [L211] COND FALSE !(!cond) [L6944-L6946] RET assume_abort_if_not(size <= ( (18446744073709551615UL) >> (8 + 1))) [L6947] return malloc(size); [L6816] RET, EXPR bounded_malloc(required_bytes) [L6816] struct hash_table_state *impl = bounded_malloc(required_bytes); [L6817] impl->size = num_entries [L6818] map->p_impl = impl [L10134] RET ensure_allocated_hash_table(&map, 4) [L10135] CALL, EXPR aws_hash_table_is_valid(&map) [L10008] EXPR map && map->p_impl [L10008] EXPR map && map->p_impl && hash_table_state_is_valid(map->p_impl) [L10008] EXPR map->p_impl [L10008] CALL, EXPR hash_table_state_is_valid(map->p_impl) [L10019] COND FALSE !(!map) [L10026] EXPR map->hash_fn [L10025-L10028] _Bool hash_fn_nonnull = (map->hash_fn != ((void *)0) ); [L10031] EXPR map->equals_fn [L10030-L10033] _Bool equals_fn_nonnull = (map->equals_fn != ((void *)0) ); [L10037] EXPR map->alloc [L10036-L10039] _Bool alloc_nonnull = (map->alloc != ((void *)0) ); [L10042] EXPR map->size [L10041-L10042] _Bool size_at_least_two = (map->size >= 2); [L10045] EXPR map->size [L10045] CALL, EXPR aws_is_power_of_two(map->size) [L2630] return x && (!(x & (x - 1))); [L10045] RET, EXPR aws_is_power_of_two(map->size) [L10044-L10045] _Bool size_is_power_of_two = aws_is_power_of_two(map->size); [L10048] EXPR map->entry_count [L10048] EXPR map->max_load [L10047-L10048] _Bool entry_count = (map->entry_count <= map->max_load); [L10051] EXPR map->max_load [L10051] EXPR map->size [L10050-L10051] _Bool max_load = (map->max_load < map->size); [L10054] EXPR map->mask [L10054] EXPR map->size [L10053-L10054] _Bool mask_is_correct = (map->mask == (map->size - 1)); [L10057] EXPR map->max_load_factor [L10056-L10057] _Bool max_load_factor_bounded = map->max_load_factor == 0.95; [L10060] EXPR map->size [L10059-L10060] _Bool slots_allocated = ((((sizeof(map->slots[0]) * map->size)) == 0) || ((&map->slots[0]))); [L10062-L10063] return hash_fn_nonnull && equals_fn_nonnull && alloc_nonnull && size_at_least_two && size_is_power_of_two && entry_count && max_load && mask_is_correct && max_load_factor_bounded && slots_allocated; [L10008] RET, EXPR hash_table_state_is_valid(map->p_impl) [L10008] EXPR map && map->p_impl && hash_table_state_is_valid(map->p_impl) [L10008] return map && map->p_impl && hash_table_state_is_valid(map->p_impl); [L10135] RET, EXPR aws_hash_table_is_valid(&map) [L10135] CALL assume_abort_if_not(aws_hash_table_is_valid(&map)) [L211] COND FALSE !(!cond) [L10135] RET assume_abort_if_not(aws_hash_table_is_valid(&map)) [L10136] EXPR map.p_impl [L10136] CALL, EXPR nondet_bool() [L261] return __VERIFIER_nondet_bool(); [L10136] RET, EXPR nondet_bool() [L10136-L10138] EXPR nondet_bool() ? ((void *)0) : hash_proof_destroy_noop [L10136-L10138] map.p_impl->destroy_key_fn = nondet_bool() ? ((void *)0) : hash_proof_destroy_noop [L10139] EXPR map.p_impl [L10139] CALL, EXPR nondet_bool() [L261] return __VERIFIER_nondet_bool(); [L10139] RET, EXPR nondet_bool() [L10139-L10141] EXPR nondet_bool() ? ((void *)0) : hash_proof_destroy_noop [L10139-L10141] map.p_impl->destroy_value_fn = nondet_bool() ? ((void *)0) : hash_proof_destroy_noop [L10142] EXPR map.p_impl [L10142] map.p_impl->equals_fn = uninterpreted_equals_assert_inputs_nonnull [L10143] EXPR map.p_impl [L10143] map.p_impl->hash_fn = uninterpreted_hasher [L10144] EXPR map.p_impl [L10144] CALL, EXPR can_fail_allocator() [L6951] return &s_can_fail_allocator_static; [L10144] RET, EXPR can_fail_allocator() [L10144] map.p_impl->alloc = can_fail_allocator() [L10146] size_t empty_slot_idx; [L10147] CALL, EXPR aws_hash_table_has_an_empty_slot(&map, &empty_slot_idx) [L6833] EXPR map->p_impl [L6833] CALL, EXPR hash_table_state_has_an_empty_slot(map->p_impl, rval) [L6839] EXPR state->entry_count [L6839] CALL assume_abort_if_not(state->entry_count > 0) [L211] COND FALSE !(!cond) [L6839] RET assume_abort_if_not(state->entry_count > 0) [L6840] CALL, EXPR nondet_uint64_t() [L266] return __VERIFIER_nondet_ulong(); [L6840] RET, EXPR nondet_uint64_t() [L6840] size_t empty_slot_idx = nondet_uint64_t(); [L6841] EXPR state->size [L6841] CALL assume_abort_if_not(empty_slot_idx < state->size) [L211] COND FALSE !(!cond) [L6841] RET assume_abort_if_not(empty_slot_idx < state->size) [L6842] *rval = empty_slot_idx [L6843] EXPR state->slots[empty_slot_idx].hash_code [L6843] return state->slots[empty_slot_idx].hash_code == 0; [L6833] RET, EXPR hash_table_state_has_an_empty_slot(map->p_impl, rval) [L6833] return hash_table_state_has_an_empty_slot(map->p_impl, rval); [L10147] RET, EXPR aws_hash_table_has_an_empty_slot(&map, &empty_slot_idx) [L10147] CALL assume_abort_if_not(aws_hash_table_has_an_empty_slot(&map, &empty_slot_idx)) [L211] COND FALSE !(!cond) [L10147] RET assume_abort_if_not(aws_hash_table_has_an_empty_slot(&map, &empty_slot_idx)) [L10148] void *key; [L10149] struct aws_hash_element p_elem; [L10151-L10152] _Bool get_p_elem; [L10154-L10155] _Bool track_was_present; [L10156] int was_present; [L10158] struct hash_table_state old_state = *map.p_impl; [L10158] EXPR map.p_impl [L10158] struct hash_table_state old_state = *map.p_impl; [L10161] CALL, EXPR aws_hash_table_is_valid(&map) [L10008] EXPR map && map->p_impl [L10008] EXPR map && map->p_impl && hash_table_state_is_valid(map->p_impl) [L10008] EXPR map->p_impl [L10008] CALL, EXPR hash_table_state_is_valid(map->p_impl) [L10019] COND FALSE !(!map) [L10026] EXPR map->hash_fn [L10025-L10028] _Bool hash_fn_nonnull = (map->hash_fn != ((void *)0) ); [L10031] EXPR map->equals_fn [L10030-L10033] _Bool equals_fn_nonnull = (map->equals_fn != ((void *)0) ); [L10037] EXPR map->alloc [L10036-L10039] _Bool alloc_nonnull = (map->alloc != ((void *)0) ); [L10042] EXPR map->size [L10041-L10042] _Bool size_at_least_two = (map->size >= 2); [L10045] EXPR map->size [L10045] CALL, EXPR aws_is_power_of_two(map->size) [L2630] return x && (!(x & (x - 1))); [L10045] RET, EXPR aws_is_power_of_two(map->size) [L10044-L10045] _Bool size_is_power_of_two = aws_is_power_of_two(map->size); [L10048] EXPR map->entry_count [L10048] EXPR map->max_load [L10047-L10048] _Bool entry_count = (map->entry_count <= map->max_load); [L10051] EXPR map->max_load [L10051] EXPR map->size [L10050-L10051] _Bool max_load = (map->max_load < map->size); [L10054] EXPR map->mask [L10054] EXPR map->size [L10053-L10054] _Bool mask_is_correct = (map->mask == (map->size - 1)); [L10057] EXPR map->max_load_factor [L10056-L10057] _Bool max_load_factor_bounded = map->max_load_factor == 0.95; [L10060] EXPR map->size [L10059-L10060] _Bool slots_allocated = ((((sizeof(map->slots[0]) * map->size)) == 0) || ((&map->slots[0]))); [L10062-L10063] return hash_fn_nonnull && equals_fn_nonnull && alloc_nonnull && size_at_least_two && size_is_power_of_two && entry_count && max_load && mask_is_correct && max_load_factor_bounded && slots_allocated; [L10008] RET, EXPR hash_table_state_is_valid(map->p_impl) [L10008] EXPR map && map->p_impl && hash_table_state_is_valid(map->p_impl) [L10008] return map && map->p_impl && hash_table_state_is_valid(map->p_impl); [L10161] RET, EXPR aws_hash_table_is_valid(&map) [L10161] CALL assume_abort_if_not(aws_hash_table_is_valid(&map)) [L211] COND FALSE !(!cond) [L10161] RET assume_abort_if_not(aws_hash_table_is_valid(&map)) [L10162] CALL assume_abort_if_not(((((sizeof(*(&p_elem)))) == 0) || (((&p_elem))))) [L211] COND FALSE !(!cond) [L10162] RET assume_abort_if_not(((((sizeof(*(&p_elem)))) == 0) || (((&p_elem))))) [L10163] CALL assume_abort_if_not(((((sizeof(*(&was_present)))) == 0) || (((&was_present))))) [L211] COND FALSE !(!cond) [L10163] RET assume_abort_if_not(((((sizeof(*(&was_present)))) == 0) || (((&was_present))))) [L10165-L10166] EXPR get_p_elem ? &p_elem : ((void *)0) [L10167-L10168] EXPR track_was_present ? &was_present : ((void *)0) [L10165-L10169] CALL aws_hash_table_remove(&map, key, get_p_elem ? &p_elem : ((void *)0) , track_was_present ? &was_present : ((void *)0) ) [L9666] CALL, EXPR aws_hash_table_is_valid(map) [L10008] EXPR map && map->p_impl [L10008] EXPR map && map->p_impl && hash_table_state_is_valid(map->p_impl) [L10008] return map && map->p_impl && hash_table_state_is_valid(map->p_impl); [L9666] RET, EXPR aws_hash_table_is_valid(map) [L9666] CALL assume_abort_if_not((aws_hash_table_is_valid(map))) [L211] COND FALSE !(!cond) [L9666] RET assume_abort_if_not((aws_hash_table_is_valid(map))) [L9667-L9669] CALL assume_abort_if_not((p_value == ((void *)0) || ((((sizeof(*(p_value)))) == 0) || (((p_value)))))) [L211] COND FALSE !(!cond) [L9667-L9669] RET assume_abort_if_not((p_value == ((void *)0) || ((((sizeof(*(p_value)))) == 0) || (((p_value)))))) [L9671-L9673] CALL assume_abort_if_not((was_present == ((void *)0) || ((((sizeof(*(was_present)))) == 0) || (((was_present)))))) [L211] COND FALSE !(!cond) [L9671-L9673] RET assume_abort_if_not((was_present == ((void *)0) || ((((sizeof(*(was_present)))) == 0) || (((was_present)))))) [L9677] EXPR map->p_impl [L9677] struct hash_table_state *state = map->p_impl; [L9678] CALL, EXPR s_hash_for(state, key) [L9101] CALL, EXPR hash_table_state_is_valid(state) [L10019] COND FALSE !(!map) [L10026] EXPR map->hash_fn [L10025-L10028] _Bool hash_fn_nonnull = (map->hash_fn != ((void *)0) ); [L10031] EXPR map->equals_fn [L10030-L10033] _Bool equals_fn_nonnull = (map->equals_fn != ((void *)0) ); [L10037] EXPR map->alloc [L10036-L10039] _Bool alloc_nonnull = (map->alloc != ((void *)0) ); [L10042] EXPR map->size [L10041-L10042] _Bool size_at_least_two = (map->size >= 2); [L10045] EXPR map->size [L10045] CALL, EXPR aws_is_power_of_two(map->size) [L2630] return x && (!(x & (x - 1))); [L10045] RET, EXPR aws_is_power_of_two(map->size) [L10044-L10045] _Bool size_is_power_of_two = aws_is_power_of_two(map->size); [L10048] EXPR map->entry_count [L10048] EXPR map->max_load [L10047-L10048] _Bool entry_count = (map->entry_count <= map->max_load); [L10051] EXPR map->max_load [L10051] EXPR map->size [L10050-L10051] _Bool max_load = (map->max_load < map->size); [L10054] EXPR map->mask [L10054] EXPR map->size [L10053-L10054] _Bool mask_is_correct = (map->mask == (map->size - 1)); [L10057] EXPR map->max_load_factor [L10056-L10057] _Bool max_load_factor_bounded = map->max_load_factor == 0.95; [L10060] EXPR map->size [L10059-L10060] _Bool slots_allocated = ((((sizeof(map->slots[0]) * map->size)) == 0) || ((&map->slots[0]))); [L10062-L10063] return hash_fn_nonnull && equals_fn_nonnull && alloc_nonnull && size_at_least_two && size_is_power_of_two && entry_count && max_load && mask_is_correct && max_load_factor_bounded && slots_allocated; [L9101] RET, EXPR hash_table_state_is_valid(state) [L9101] CALL assume_abort_if_not((hash_table_state_is_valid(state))) [L211] COND FALSE !(!cond) [L9101] RET assume_abort_if_not((hash_table_state_is_valid(state))) [L9102] FCALL s_suppress_unused_lookup3_func_warnings() [L9104-L9105] COND TRUE key == ((void *)0) [L9108] return 42; [L9678] RET, EXPR s_hash_for(state, key) [L9678] uint64_t hash_code = s_hash_for(state, key); [L9679] struct hash_table_entry *entry; [L9680] int ignored; [L9682] COND TRUE !was_present [L9683] was_present = &ignored [L9686-L9688] CALL, EXPR s_find_entry(state, hash_code, key, &entry, ((void *)0) ) [L9327] EXPR state->mask [L9327] struct hash_table_entry *entry = &state->slots[hash_code & state->mask]; [L9329] EXPR entry->hash_code [L9329] COND TRUE entry->hash_code == 0 [L9330] COND TRUE \read(*p_probe_idx) [L9331] *p_probe_idx = 0 [L9333] *p_entry = entry [L9334] return AWS_ERROR_HASHTBL_ITEM_NOT_FOUND; [L9686-L9688] RET, EXPR s_find_entry(state, hash_code, key, &entry, ((void *)0) ) [L9686-L9688] int rv = s_find_entry(state, hash_code, key, &entry, ((void *)0) ); [L9690] COND TRUE rv != AWS_ERROR_SUCCESS [L9691] *was_present = 0 [L9692] CALL, EXPR aws_hash_table_is_valid(map) [L10008] EXPR map && map->p_impl [L10008] EXPR map && map->p_impl && hash_table_state_is_valid(map->p_impl) [L10008] return map && map->p_impl && hash_table_state_is_valid(map->p_impl); [L9692] RET, EXPR aws_hash_table_is_valid(map) [L9692] CALL __VERIFIER_assert((aws_hash_table_is_valid(map))) [L223] COND TRUE !cond [L223] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 28 procedures, 259 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 136.7s, OverallIterations: 10, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 216 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 13408 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2586 IncrementalHoareTripleChecker+Unchecked, 12011 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1996 IncrementalHoareTripleChecker+Invalid, 4601 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 2600 mSDtfsCounter, 1996 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1924 GetRequests, 1762 SyntacticMatches, 6 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=279occurred in iteration=9, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 49.3s InterpolantComputationTime, 2591 NumberOfCodeBlocks, 2477 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 2862 ConstructedInterpolants, 21 QuantifiedInterpolants, 6505 SizeOfPredicates, 79 NumberOfNonLiveVariables, 25951 ConjunctsInSsa, 368 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 4567/4624 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 58.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 39, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 30, TOOLS_POST_TIME: 54.6s, TOOLS_POST_CALL_APPLICATIONS: 33, TOOLS_POST_CALL_TIME: 1.3s, TOOLS_POST_RETURN_APPLICATIONS: 24, TOOLS_POST_RETURN_TIME: 0.9s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 87, TOOLS_QUANTIFIERELIM_TIME: 56.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 53.7s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 118, FLUID_YES_ANSWERS: 4, DOMAIN_JOIN_APPLICATIONS: 25, DOMAIN_JOIN_TIME: 0.4s, DOMAIN_ALPHA_APPLICATIONS: 4, DOMAIN_ALPHA_TIME: 0.7s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 39, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 24, CALL_SUMMARIZER_CACHE_MISSES: 7, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.1s, DAG_COMPRESSION_PROCESSED_NODES: 4039, DAG_COMPRESSION_RETAINED_NODES: 236, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 18:09:10,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7 --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 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:09:12,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:09:12,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:09:12,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:09:12,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:09:12,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:09:12,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:09:12,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:09:12,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:09:12,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:09:12,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:09:12,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:09:12,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:09:12,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:09:12,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:09:12,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:09:12,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:09:12,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:09:12,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:09:12,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:09:12,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:09:12,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:09:12,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:09:12,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:09:12,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:09:12,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:09:12,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:09:12,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:09:12,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:09:12,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:09:12,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:09:12,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:09:12,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:09:12,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:09:12,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:09:12,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:09:12,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:09:12,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:09:12,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:09:12,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:09:12,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:09:12,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-25 18:09:12,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:09:12,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:09:12,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:09:12,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:09:12,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:09:12,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:09:12,988 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:09:12,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:09:12,989 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:09:12,989 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:09:12,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:09:12,991 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:09:12,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:09:12,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:09:12,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:09:12,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:09:12,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:09:12,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:09:12,994 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:09:12,994 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:09:12,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:09:12,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:09:12,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:09:12,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:09:12,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:09:12,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:09:12,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:09:12,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:09:12,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:09:12,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:09:12,996 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:09:12,997 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:09:12,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:09:12,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:09:12,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:09:12,998 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 [2021-11-25 18:09:13,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:09:13,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:09:13,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:09:13,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:09:13,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:09:13,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2021-11-25 18:09:13,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/9590ff118/aa611f7ef3684e22960b23dc182cbc43/FLAGde74057a6 [2021-11-25 18:09:14,397 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:09:14,398 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2021-11-25 18:09:14,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/9590ff118/aa611f7ef3684e22960b23dc182cbc43/FLAGde74057a6 [2021-11-25 18:09:14,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/data/9590ff118/aa611f7ef3684e22960b23dc182cbc43 [2021-11-25 18:09:14,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:09:14,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:09:14,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:09:14,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:09:14,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:09:14,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:14" (1/1) ... [2021-11-25 18:09:14,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17816eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:14, skipping insertion in model container [2021-11-25 18:09:14,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:14" (1/1) ... [2021-11-25 18:09:14,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:09:15,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:09:15,459 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2021-11-25 18:09:15,467 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2021-11-25 18:09:16,584 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,585 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,585 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,586 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,587 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,602 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,603 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,605 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,606 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,608 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,610 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:16,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,161 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:09:17,163 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:09:17,164 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:09:17,165 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:09:17,167 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:09:17,167 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:09:17,168 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:09:17,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:09:17,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:09:17,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:09:17,442 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:09:17,827 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,828 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,851 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,852 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,858 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,859 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,874 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,875 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,875 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,877 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,877 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:17,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:09:17,956 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 18:09:18,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:09:18,036 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2021-11-25 18:09:18,040 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2021-11-25 18:09:18,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,113 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,114 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,115 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,115 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,116 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,118 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,118 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:09:18,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:09:18,171 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:09:18,172 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:09:18,173 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:09:18,176 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:09:18,177 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:09:18,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:09:18,178 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:09:18,179 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:09:18,205 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:09:18,372 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,373 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,381 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,385 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,385 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,398 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,399 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,400 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,400 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,401 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,401 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,401 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:09:18,465 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:09:18,506 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2021-11-25 18:09:18,512 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_2140390c-5b4b-49ab-9367-f6577d810301/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2021-11-25 18:09:18,552 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,553 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,554 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,554 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,555 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,562 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,563 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,564 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,600 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:09:18,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:09:18,602 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:09:18,603 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:09:18,603 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:09:18,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:09:18,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:09:18,606 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:09:18,606 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:09:18,607 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:09:18,627 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:09:18,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,759 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,763 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,764 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,795 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:09:18,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:09:19,174 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:09:19,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19 WrapperNode [2021-11-25 18:09:19,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:09:19,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:09:19,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:09:19,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:09:19,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,404 INFO L137 Inliner]: procedures = 795, calls = 2499, calls flagged for inlining = 71, calls inlined = 18, statements flattened = 1058 [2021-11-25 18:09:19,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:09:19,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:09:19,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:09:19,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:09:19,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:09:19,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:09:19,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:09:19,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:09:19,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (1/1) ... [2021-11-25 18:09:19,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:09:19,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:19,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:09:19,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:09:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-25 18:09:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 18:09:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 18:09:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-25 18:09:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-25 18:09:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:09:19,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:09:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-25 18:09:19,686 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-25 18:09:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:09:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:09:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:09:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:09:19,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:09:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 18:09:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 18:09:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-25 18:09:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-25 18:09:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:09:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:09:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-25 18:09:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-25 18:09:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:09:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 18:09:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 18:09:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-25 18:09:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-25 18:09:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-25 18:09:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-25 18:09:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-25 18:09:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-25 18:09:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-25 18:09:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-25 18:09:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-25 18:09:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-25 18:09:19,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-25 18:09:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:09:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:09:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-25 18:09:19,690 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-25 18:09:19,691 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-25 18:09:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 18:09:19,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 18:09:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-25 18:09:19,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-25 18:09:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-25 18:09:19,692 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-25 18:09:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-25 18:09:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:09:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-25 18:09:19,692 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-25 18:09:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:09:19,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:09:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-25 18:09:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:09:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-25 18:09:19,693 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-25 18:09:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:09:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 18:09:19,694 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 18:09:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-25 18:09:19,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-25 18:09:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-25 18:09:19,695 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-25 18:09:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intFLOATTYPE8 [2021-11-25 18:09:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2021-11-25 18:09:19,696 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2021-11-25 18:09:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-25 18:09:19,696 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-25 18:09:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2021-11-25 18:09:19,698 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2021-11-25 18:09:20,159 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:09:20,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:09:21,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !true; [2021-11-25 18:09:21,377 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2021-11-25 18:09:21,422 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-25 18:09:21,611 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-25 18:09:26,143 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !true; [2021-11-25 18:09:26,144 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !true; [2021-11-25 18:09:26,171 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:09:26,181 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:09:26,181 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-25 18:09:26,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:26 BoogieIcfgContainer [2021-11-25 18:09:26,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:09:26,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:09:26,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:09:26,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:09:26,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:09:14" (1/3) ... [2021-11-25 18:09:26,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1fb8cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:26, skipping insertion in model container [2021-11-25 18:09:26,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:19" (2/3) ... [2021-11-25 18:09:26,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1fb8cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:26, skipping insertion in model container [2021-11-25 18:09:26,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:26" (3/3) ... [2021-11-25 18:09:26,191 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_remove_harness.i [2021-11-25 18:09:26,196 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:09:26,196 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:09:26,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:09:26,251 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 [2021-11-25 18:09:26,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:09:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 301 states, 195 states have (on average 1.2564102564102564) internal successors, (245), 190 states have internal predecessors, (245), 84 states have call successors, (84), 26 states have call predecessors, (84), 26 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-25 18:09:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-25 18:09:26,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:26,295 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:26,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1239254370, now seen corresponding path program 1 times [2021-11-25 18:09:26,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:26,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785969220] [2021-11-25 18:09:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:26,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:26,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:26,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:09:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2035 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:09:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-25 18:09:28,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:28,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:28,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785969220] [2021-11-25 18:09:28,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785969220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:28,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:28,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:28,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294458697] [2021-11-25 18:09:28,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:28,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:28,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:28,559 INFO L87 Difference]: Start difference. First operand has 301 states, 195 states have (on average 1.2564102564102564) internal successors, (245), 190 states have internal predecessors, (245), 84 states have call successors, (84), 26 states have call predecessors, (84), 26 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 18:09:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:28,736 INFO L93 Difference]: Finished difference Result 600 states and 873 transitions. [2021-11-25 18:09:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 182 [2021-11-25 18:09:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:28,759 INFO L225 Difference]: With dead ends: 600 [2021-11-25 18:09:28,763 INFO L226 Difference]: Without dead ends: 297 [2021-11-25 18:09:28,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:28,774 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 2 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:28,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1580 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:09:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-25 18:09:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-11-25 18:09:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 185 states have (on average 1.2216216216216216) internal successors, (226), 187 states have internal predecessors, (226), 84 states have call successors, (84), 26 states have call predecessors, (84), 27 states have return successors, (83), 83 states have call predecessors, (83), 82 states have call successors, (83) [2021-11-25 18:09:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 393 transitions. [2021-11-25 18:09:28,878 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 393 transitions. Word has length 182 [2021-11-25 18:09:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:28,880 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 393 transitions. [2021-11-25 18:09:28,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 18:09:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 393 transitions. [2021-11-25 18:09:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-25 18:09:28,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:28,893 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:28,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:29,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:29,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:29,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1283812874, now seen corresponding path program 1 times [2021-11-25 18:09:29,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:29,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546214705] [2021-11-25 18:09:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:29,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:29,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:29,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:29,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:09:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 2015 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:09:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-25 18:09:31,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:31,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546214705] [2021-11-25 18:09:31,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546214705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:31,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:31,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:09:31,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213521672] [2021-11-25 18:09:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:31,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:09:31,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:09:31,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:31,005 INFO L87 Difference]: Start difference. First operand 297 states and 393 transitions. Second operand has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 18:09:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:31,507 INFO L93 Difference]: Finished difference Result 552 states and 735 transitions. [2021-11-25 18:09:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:09:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 188 [2021-11-25 18:09:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:31,513 INFO L225 Difference]: With dead ends: 552 [2021-11-25 18:09:31,513 INFO L226 Difference]: Without dead ends: 299 [2021-11-25 18:09:31,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:09:31,515 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 3 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:31,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1763 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:09:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-25 18:09:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 293. [2021-11-25 18:09:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 182 states have (on average 1.2142857142857142) internal successors, (221), 184 states have internal predecessors, (221), 84 states have call successors, (84), 26 states have call predecessors, (84), 26 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-25 18:09:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 387 transitions. [2021-11-25 18:09:31,542 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 387 transitions. Word has length 188 [2021-11-25 18:09:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 387 transitions. [2021-11-25 18:09:31,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 18:09:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 387 transitions. [2021-11-25 18:09:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-25 18:09:31,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:31,577 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:31,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:31,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:31,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash -65267262, now seen corresponding path program 1 times [2021-11-25 18:09:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354143918] [2021-11-25 18:09:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:31,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:31,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:31,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:09:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:09:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-25 18:09:33,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:33,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:33,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354143918] [2021-11-25 18:09:33,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354143918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:33,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:33,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:33,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037860321] [2021-11-25 18:09:33,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:33,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:33,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:33,924 INFO L87 Difference]: Start difference. First operand 293 states and 387 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-25 18:09:36,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:36,302 INFO L93 Difference]: Finished difference Result 540 states and 725 transitions. [2021-11-25 18:09:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 193 [2021-11-25 18:09:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:36,308 INFO L225 Difference]: With dead ends: 540 [2021-11-25 18:09:36,308 INFO L226 Difference]: Without dead ends: 300 [2021-11-25 18:09:36,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:36,310 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 22 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:36,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1082 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:09:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-25 18:09:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-11-25 18:09:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 187 states have (on average 1.213903743315508) internal successors, (227), 190 states have internal predecessors, (227), 85 states have call successors, (85), 26 states have call predecessors, (85), 27 states have return successors, (88), 83 states have call predecessors, (88), 83 states have call successors, (88) [2021-11-25 18:09:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 400 transitions. [2021-11-25 18:09:36,368 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 400 transitions. Word has length 193 [2021-11-25 18:09:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:36,369 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 400 transitions. [2021-11-25 18:09:36,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-25 18:09:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 400 transitions. [2021-11-25 18:09:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-25 18:09:36,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:36,373 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:36,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:36,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:36,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash 641329344, now seen corresponding path program 1 times [2021-11-25 18:09:36,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924629370] [2021-11-25 18:09:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:36,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:36,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:36,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:09:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:09:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-25 18:09:39,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:39,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:39,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924629370] [2021-11-25 18:09:39,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924629370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:39,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:39,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 18:09:39,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519870592] [2021-11-25 18:09:39,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:39,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:09:39,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:09:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:09:39,803 INFO L87 Difference]: Start difference. First operand 300 states and 400 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-25 18:09:42,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:44,121 INFO L93 Difference]: Finished difference Result 559 states and 751 transitions. [2021-11-25 18:09:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:09:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 193 [2021-11-25 18:09:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:44,137 INFO L225 Difference]: With dead ends: 559 [2021-11-25 18:09:44,137 INFO L226 Difference]: Without dead ends: 304 [2021-11-25 18:09:44,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:09:44,140 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 27 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:44,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 3131 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 1 Unknown, 200 Unchecked, 4.2s Time] [2021-11-25 18:09:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-25 18:09:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-11-25 18:09:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 191 states have (on average 1.2094240837696335) internal successors, (231), 193 states have internal predecessors, (231), 85 states have call successors, (85), 27 states have call predecessors, (85), 27 states have return successors, (88), 83 states have call predecessors, (88), 83 states have call successors, (88) [2021-11-25 18:09:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 404 transitions. [2021-11-25 18:09:44,176 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 404 transitions. Word has length 193 [2021-11-25 18:09:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:44,177 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 404 transitions. [2021-11-25 18:09:44,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-25 18:09:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 404 transitions. [2021-11-25 18:09:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-25 18:09:44,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:44,181 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:44,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:44,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:44,402 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:44,403 INFO L85 PathProgramCache]: Analyzing trace with hash 700808702, now seen corresponding path program 1 times [2021-11-25 18:09:44,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572389612] [2021-11-25 18:09:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:44,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:44,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:44,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:44,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:09:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:09:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:46,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-25 18:09:47,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:47,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572389612] [2021-11-25 18:09:47,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572389612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:47,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:47,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:09:47,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206728709] [2021-11-25 18:09:47,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:47,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:09:47,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:09:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:09:47,508 INFO L87 Difference]: Start difference. First operand 304 states and 404 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 10 states have internal predecessors, (86), 5 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-25 18:09:50,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:50,313 INFO L93 Difference]: Finished difference Result 560 states and 752 transitions. [2021-11-25 18:09:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:09:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 10 states have internal predecessors, (86), 5 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) Word has length 199 [2021-11-25 18:09:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:50,319 INFO L225 Difference]: With dead ends: 560 [2021-11-25 18:09:50,319 INFO L226 Difference]: Without dead ends: 307 [2021-11-25 18:09:50,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:09:50,322 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 22 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:50,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1820 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 98 Unchecked, 2.7s Time] [2021-11-25 18:09:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-25 18:09:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-25 18:09:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 193 states have (on average 1.2072538860103628) internal successors, (233), 195 states have internal predecessors, (233), 86 states have call successors, (86), 28 states have call predecessors, (86), 27 states have return successors, (89), 83 states have call predecessors, (89), 84 states have call successors, (89) [2021-11-25 18:09:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 408 transitions. [2021-11-25 18:09:50,347 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 408 transitions. Word has length 199 [2021-11-25 18:09:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 408 transitions. [2021-11-25 18:09:50,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 10 states have internal predecessors, (86), 5 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-25 18:09:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 408 transitions. [2021-11-25 18:09:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 18:09:50,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:50,352 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:50,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:50,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:50,582 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1607971567, now seen corresponding path program 1 times [2021-11-25 18:09:50,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:50,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480209754] [2021-11-25 18:09:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:50,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:50,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:50,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:50,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:09:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:09:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-25 18:09:53,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:53,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480209754] [2021-11-25 18:09:53,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480209754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:53,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:53,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:53,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941703471] [2021-11-25 18:09:53,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:53,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:53,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:53,039 INFO L87 Difference]: Start difference. First operand 307 states and 408 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-25 18:09:55,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:09:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:55,422 INFO L93 Difference]: Finished difference Result 524 states and 706 transitions. [2021-11-25 18:09:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 204 [2021-11-25 18:09:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:55,426 INFO L225 Difference]: With dead ends: 524 [2021-11-25 18:09:55,426 INFO L226 Difference]: Without dead ends: 307 [2021-11-25 18:09:55,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:55,428 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 53 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:55,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1035 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:09:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-25 18:09:55,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-25 18:09:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 193 states have (on average 1.2072538860103628) internal successors, (233), 195 states have internal predecessors, (233), 86 states have call successors, (86), 28 states have call predecessors, (86), 27 states have return successors, (87), 83 states have call predecessors, (87), 84 states have call successors, (87) [2021-11-25 18:09:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 406 transitions. [2021-11-25 18:09:55,450 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 406 transitions. Word has length 204 [2021-11-25 18:09:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:55,451 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 406 transitions. [2021-11-25 18:09:55,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-25 18:09:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 406 transitions. [2021-11-25 18:09:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 18:09:55,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:55,454 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:55,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:55,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:55,678 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1115345393, now seen corresponding path program 2 times [2021-11-25 18:09:55,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190940970] [2021-11-25 18:09:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:09:55,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:55,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:55,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:09:56,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 18:09:56,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:09:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:09:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-11-25 18:09:56,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:56,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190940970] [2021-11-25 18:09:56,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190940970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:56,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:56,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:56,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023913205] [2021-11-25 18:09:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:56,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:09:56,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:09:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:09:56,855 INFO L87 Difference]: Start difference. First operand 307 states and 406 transitions. Second operand has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2021-11-25 18:09:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:56,973 INFO L93 Difference]: Finished difference Result 315 states and 413 transitions. [2021-11-25 18:09:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:09:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 204 [2021-11-25 18:09:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:56,977 INFO L225 Difference]: With dead ends: 315 [2021-11-25 18:09:56,977 INFO L226 Difference]: Without dead ends: 313 [2021-11-25 18:09:56,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:56,981 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 12 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:56,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1520 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:09:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-25 18:09:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2021-11-25 18:09:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 196 states have (on average 1.2040816326530612) internal successors, (236), 198 states have internal predecessors, (236), 86 states have call successors, (86), 29 states have call predecessors, (86), 28 states have return successors, (87), 83 states have call predecessors, (87), 84 states have call successors, (87) [2021-11-25 18:09:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 409 transitions. [2021-11-25 18:09:57,011 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 409 transitions. Word has length 204 [2021-11-25 18:09:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 409 transitions. [2021-11-25 18:09:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2021-11-25 18:09:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 409 transitions. [2021-11-25 18:09:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-25 18:09:57,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:57,040 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:57,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:57,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:57,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 400903547, now seen corresponding path program 1 times [2021-11-25 18:09:57,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:57,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2643564] [2021-11-25 18:09:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:57,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:57,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:57,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:09:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2176 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:09:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-25 18:09:59,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:09:59,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2643564] [2021-11-25 18:09:59,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2643564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:59,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:59,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:09:59,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038280185] [2021-11-25 18:09:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:59,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:09:59,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:09:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:09:59,690 INFO L87 Difference]: Start difference. First operand 311 states and 409 transitions. Second operand has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-25 18:10:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:00,282 INFO L93 Difference]: Finished difference Result 540 states and 723 transitions. [2021-11-25 18:10:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:10:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 217 [2021-11-25 18:10:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:00,287 INFO L225 Difference]: With dead ends: 540 [2021-11-25 18:10:00,287 INFO L226 Difference]: Without dead ends: 319 [2021-11-25 18:10:00,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:10:00,290 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 3 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:00,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2117 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:10:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-25 18:10:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 314. [2021-11-25 18:10:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 198 states have (on average 1.202020202020202) internal successors, (238), 201 states have internal predecessors, (238), 86 states have call successors, (86), 29 states have call predecessors, (86), 29 states have return successors, (91), 83 states have call predecessors, (91), 84 states have call successors, (91) [2021-11-25 18:10:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2021-11-25 18:10:00,309 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 415 transitions. Word has length 217 [2021-11-25 18:10:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:00,310 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 415 transitions. [2021-11-25 18:10:00,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-25 18:10:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 415 transitions. [2021-11-25 18:10:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-25 18:10:00,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:00,313 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:00,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:00,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:00,534 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:00,535 INFO L85 PathProgramCache]: Analyzing trace with hash 924128445, now seen corresponding path program 2 times [2021-11-25 18:10:00,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8951816] [2021-11-25 18:10:00,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:10:00,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:00,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:00,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:10:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:10:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:10:04,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:10:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-25 18:10:05,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:05,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:05,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8951816] [2021-11-25 18:10:05,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8951816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:05,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:05,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:10:05,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138063147] [2021-11-25 18:10:05,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:05,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:10:05,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:10:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:10:05,966 INFO L87 Difference]: Start difference. First operand 314 states and 415 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 18:10:09,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:11,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:12,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:13,485 INFO L93 Difference]: Finished difference Result 542 states and 731 transitions. [2021-11-25 18:10:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:10:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) Word has length 223 [2021-11-25 18:10:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:13,500 INFO L225 Difference]: With dead ends: 542 [2021-11-25 18:10:13,500 INFO L226 Difference]: Without dead ends: 316 [2021-11-25 18:10:13,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:10:13,502 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 7 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2108 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:13,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2108 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 2 Unknown, 145 Unchecked, 7.2s Time] [2021-11-25 18:10:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-25 18:10:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2021-11-25 18:10:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 198 states have (on average 1.202020202020202) internal successors, (238), 200 states have internal predecessors, (238), 85 states have call successors, (85), 29 states have call predecessors, (85), 29 states have return successors, (90), 83 states have call predecessors, (90), 83 states have call successors, (90) [2021-11-25 18:10:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 413 transitions. [2021-11-25 18:10:13,521 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 413 transitions. Word has length 223 [2021-11-25 18:10:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:13,522 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 413 transitions. [2021-11-25 18:10:13,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 2 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 18:10:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 413 transitions. [2021-11-25 18:10:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-25 18:10:13,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:13,524 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:13,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-25 18:10:13,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:13,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1742974628, now seen corresponding path program 3 times [2021-11-25 18:10:13,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112082459] [2021-11-25 18:10:13,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:10:13,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:13,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:13,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:10:16,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:10:16,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:10:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:10:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-11-25 18:10:16,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:16,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:16,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112082459] [2021-11-25 18:10:16,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112082459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:16,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:16,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:10:16,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132820121] [2021-11-25 18:10:16,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:16,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:10:16,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:10:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:10:16,883 INFO L87 Difference]: Start difference. First operand 313 states and 413 transitions. Second operand has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-25 18:10:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:17,488 INFO L93 Difference]: Finished difference Result 527 states and 704 transitions. [2021-11-25 18:10:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:10:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 228 [2021-11-25 18:10:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:17,493 INFO L225 Difference]: With dead ends: 527 [2021-11-25 18:10:17,493 INFO L226 Difference]: Without dead ends: 317 [2021-11-25 18:10:17,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:10:17,495 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 3 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:17,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1764 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:10:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-25 18:10:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2021-11-25 18:10:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 199 states have (on average 1.2010050251256281) internal successors, (239), 202 states have internal predecessors, (239), 85 states have call successors, (85), 29 states have call predecessors, (85), 30 states have return successors, (97), 83 states have call predecessors, (97), 83 states have call successors, (97) [2021-11-25 18:10:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 421 transitions. [2021-11-25 18:10:17,515 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 421 transitions. Word has length 228 [2021-11-25 18:10:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:17,516 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 421 transitions. [2021-11-25 18:10:17,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-25 18:10:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 421 transitions. [2021-11-25 18:10:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-25 18:10:17,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:17,518 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:17,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:17,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:17,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash -257285303, now seen corresponding path program 1 times [2021-11-25 18:10:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:17,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844635893] [2021-11-25 18:10:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:17,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:17,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:17,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:17,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:10:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:19,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2224 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:10:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-25 18:10:20,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:20,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844635893] [2021-11-25 18:10:20,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844635893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:20,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:20,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:10:20,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313716008] [2021-11-25 18:10:20,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:20,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:10:20,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:20,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:10:20,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:10:20,427 INFO L87 Difference]: Start difference. First operand 315 states and 421 transitions. Second operand has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-25 18:10:22,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:10:22,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:22,894 INFO L93 Difference]: Finished difference Result 535 states and 721 transitions. [2021-11-25 18:10:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:10:22,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 4 states have call successors, (36) Word has length 233 [2021-11-25 18:10:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:22,898 INFO L225 Difference]: With dead ends: 535 [2021-11-25 18:10:22,898 INFO L226 Difference]: Without dead ends: 308 [2021-11-25 18:10:22,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:10:22,900 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 86 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:22,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1371 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:10:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-25 18:10:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-11-25 18:10:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 196 states have internal predecessors, (232), 84 states have call successors, (84), 29 states have call predecessors, (84), 29 states have return successors, (92), 82 states have call predecessors, (92), 82 states have call successors, (92) [2021-11-25 18:10:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 408 transitions. [2021-11-25 18:10:22,917 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 408 transitions. Word has length 233 [2021-11-25 18:10:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:22,918 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 408 transitions. [2021-11-25 18:10:22,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-25 18:10:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 408 transitions. [2021-11-25 18:10:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-25 18:10:22,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:22,920 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:22,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:23,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:23,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash -459109237, now seen corresponding path program 1 times [2021-11-25 18:10:23,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:23,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862788551] [2021-11-25 18:10:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:23,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:23,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:23,147 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:23,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 18:10:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:10:25,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 324 proven. 3 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-25 18:10:28,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:30,249 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-25 18:10:30,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-25 18:10:30,278 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-25 18:10:30,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-11-25 18:10:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-25 18:10:30,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:30,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862788551] [2021-11-25 18:10:30,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862788551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:10:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200499043] [2021-11-25 18:10:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:30,540 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:10:30,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:10:30,544 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:10:30,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-25 18:10:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:10:32,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-11-25 18:10:32,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:32,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200499043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:32,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:10:32,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13, 12] total 24 [2021-11-25 18:10:32,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441327044] [2021-11-25 18:10:32,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:32,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:10:32,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:10:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:10:32,920 INFO L87 Difference]: Start difference. First operand 308 states and 408 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 18:10:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:33,646 INFO L93 Difference]: Finished difference Result 523 states and 698 transitions. [2021-11-25 18:10:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:10:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 233 [2021-11-25 18:10:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:33,650 INFO L225 Difference]: With dead ends: 523 [2021-11-25 18:10:33,650 INFO L226 Difference]: Without dead ends: 310 [2021-11-25 18:10:33,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 666 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:10:33,652 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 3 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:33,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2111 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:10:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-25 18:10:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2021-11-25 18:10:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 196 states have internal predecessors, (232), 84 states have call successors, (84), 29 states have call predecessors, (84), 29 states have return successors, (91), 82 states have call predecessors, (91), 82 states have call successors, (91) [2021-11-25 18:10:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 407 transitions. [2021-11-25 18:10:33,669 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 407 transitions. Word has length 233 [2021-11-25 18:10:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:33,670 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 407 transitions. [2021-11-25 18:10:33,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 18:10:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 407 transitions. [2021-11-25 18:10:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-25 18:10:33,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:33,672 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:33,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:33,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:34,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:10:34,094 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2069480192, now seen corresponding path program 1 times [2021-11-25 18:10:34,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:34,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823133062] [2021-11-25 18:10:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:34,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:34,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:34,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 18:10:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 2258 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:10:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-25 18:10:36,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:36,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823133062] [2021-11-25 18:10:36,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823133062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:36,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:36,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:10:36,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948393959] [2021-11-25 18:10:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:36,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:36,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:36,738 INFO L87 Difference]: Start difference. First operand 308 states and 407 transitions. Second operand has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2021-11-25 18:10:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:36,875 INFO L93 Difference]: Finished difference Result 318 states and 417 transitions. [2021-11-25 18:10:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:36,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 244 [2021-11-25 18:10:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:36,877 INFO L225 Difference]: With dead ends: 318 [2021-11-25 18:10:36,877 INFO L226 Difference]: Without dead ends: 316 [2021-11-25 18:10:36,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:10:36,878 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 7 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:36,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1528 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-25 18:10:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2021-11-25 18:10:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 197 states have (on average 1.1928934010152283) internal successors, (235), 200 states have internal predecessors, (235), 85 states have call successors, (85), 30 states have call predecessors, (85), 30 states have return successors, (92), 82 states have call predecessors, (92), 83 states have call successors, (92) [2021-11-25 18:10:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 412 transitions. [2021-11-25 18:10:36,893 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 412 transitions. Word has length 244 [2021-11-25 18:10:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:36,894 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 412 transitions. [2021-11-25 18:10:36,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2021-11-25 18:10:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 412 transitions. [2021-11-25 18:10:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-25 18:10:36,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:36,897 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:36,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:37,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:37,122 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2071327234, now seen corresponding path program 1 times [2021-11-25 18:10:37,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:37,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100630653] [2021-11-25 18:10:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:37,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:37,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:37,128 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:37,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 18:10:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2257 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:10:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-25 18:10:39,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:39,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100630653] [2021-11-25 18:10:39,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100630653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:39,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:39,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:10:39,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763262110] [2021-11-25 18:10:39,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:39,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:39,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:39,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:39,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:39,747 INFO L87 Difference]: Start difference. First operand 313 states and 412 transitions. Second operand has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2021-11-25 18:10:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:39,882 INFO L93 Difference]: Finished difference Result 321 states and 419 transitions. [2021-11-25 18:10:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:10:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 244 [2021-11-25 18:10:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:39,886 INFO L225 Difference]: With dead ends: 321 [2021-11-25 18:10:39,886 INFO L226 Difference]: Without dead ends: 319 [2021-11-25 18:10:39,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:10:39,887 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 7 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:39,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1524 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-25 18:10:39,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 312. [2021-11-25 18:10:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 197 states have (on average 1.1928934010152283) internal successors, (235), 199 states have internal predecessors, (235), 84 states have call successors, (84), 30 states have call predecessors, (84), 30 states have return successors, (91), 82 states have call predecessors, (91), 82 states have call successors, (91) [2021-11-25 18:10:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 410 transitions. [2021-11-25 18:10:39,905 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 410 transitions. Word has length 244 [2021-11-25 18:10:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:39,906 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 410 transitions. [2021-11-25 18:10:39,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2021-11-25 18:10:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 410 transitions. [2021-11-25 18:10:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-25 18:10:39,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:39,909 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:39,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:40,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:40,130 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash -554394461, now seen corresponding path program 1 times [2021-11-25 18:10:40,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:40,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618876155] [2021-11-25 18:10:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:40,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:40,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:40,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 18:10:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:10:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-25 18:10:43,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:43,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618876155] [2021-11-25 18:10:43,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618876155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:43,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:43,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:10:43,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227213826] [2021-11-25 18:10:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:43,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:10:43,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:10:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:43,079 INFO L87 Difference]: Start difference. First operand 312 states and 410 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 4 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-25 18:10:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:43,420 INFO L93 Difference]: Finished difference Result 545 states and 738 transitions. [2021-11-25 18:10:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:10:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 4 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 252 [2021-11-25 18:10:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:43,424 INFO L225 Difference]: With dead ends: 545 [2021-11-25 18:10:43,424 INFO L226 Difference]: Without dead ends: 360 [2021-11-25 18:10:43,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:10:43,429 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 109 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:43,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1539 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:10:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-25 18:10:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 322. [2021-11-25 18:10:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 202 states have (on average 1.188118811881188) internal successors, (240), 204 states have internal predecessors, (240), 89 states have call successors, (89), 30 states have call predecessors, (89), 30 states have return successors, (96), 87 states have call predecessors, (96), 87 states have call successors, (96) [2021-11-25 18:10:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 425 transitions. [2021-11-25 18:10:43,451 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 425 transitions. Word has length 252 [2021-11-25 18:10:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:43,452 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 425 transitions. [2021-11-25 18:10:43,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 4 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-25 18:10:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 425 transitions. [2021-11-25 18:10:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-25 18:10:43,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:43,455 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:43,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:43,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:43,669 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash 770461733, now seen corresponding path program 1 times [2021-11-25 18:10:43,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878419080] [2021-11-25 18:10:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:43,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:43,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:43,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:43,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 18:10:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:46,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:10:46,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-25 18:10:46,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:10:46,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878419080] [2021-11-25 18:10:46,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878419080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:46,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:46,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:10:46,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401367831] [2021-11-25 18:10:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:46,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:10:46,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:10:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:10:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:10:46,719 INFO L87 Difference]: Start difference. First operand 322 states and 425 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 18:10:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:46,905 INFO L93 Difference]: Finished difference Result 465 states and 611 transitions. [2021-11-25 18:10:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:10:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 252 [2021-11-25 18:10:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:46,909 INFO L225 Difference]: With dead ends: 465 [2021-11-25 18:10:46,909 INFO L226 Difference]: Without dead ends: 322 [2021-11-25 18:10:46,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:10:46,911 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 32 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:46,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1108 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-25 18:10:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-11-25 18:10:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 202 states have (on average 1.1782178217821782) internal successors, (238), 204 states have internal predecessors, (238), 89 states have call successors, (89), 30 states have call predecessors, (89), 30 states have return successors, (96), 87 states have call predecessors, (96), 87 states have call successors, (96) [2021-11-25 18:10:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 423 transitions. [2021-11-25 18:10:46,931 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 423 transitions. Word has length 252 [2021-11-25 18:10:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:46,932 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 423 transitions. [2021-11-25 18:10:46,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 18:10:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 423 transitions. [2021-11-25 18:10:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-25 18:10:46,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:46,935 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:47,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:47,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:10:47,158 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1223682973, now seen corresponding path program 1 times [2021-11-25 18:10:47,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:47,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865673864] [2021-11-25 18:10:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:47,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:47,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:47,163 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:47,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2140390c-5b4b-49ab-9367-f6577d810301/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 18:12:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2327 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 18:12:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:12:19,587 INFO L354 Elim1Store]: treesize reduction 1090, result has 6.4 percent of original size [2021-11-25 18:12:19,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 86 [2021-11-25 18:12:22,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:22,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 100 treesize of output 48 [2021-11-25 18:12:23,670 INFO L354 Elim1Store]: treesize reduction 1036, result has 5.6 percent of original size [2021-11-25 18:12:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:12:25,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:25,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 53 [2021-11-25 18:12:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 199 proven. 10 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-25 18:12:27,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:12:36,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2892 treesize of output 2878