./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:30,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:30,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:30,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:30,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:30,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:30,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:30,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:30,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:30,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:30,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:30,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:30,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:30,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:30,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:30,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:30,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:30,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:30,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:30,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:30,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:30,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:30,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:30,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:30,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:30,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:30,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:30,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:30,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:30,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:30,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:30,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:30,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:30,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:30,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:30,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:30,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:30,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:30,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:30,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:30,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:30,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:32:30,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:30,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:30,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:30,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:30,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:30,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:30,337 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:30,338 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:30,338 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:30,338 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:30,339 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:30,339 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:30,340 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:30,340 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:30,340 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:30,340 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:30,340 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:30,341 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:30,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:30,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:30,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:30,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:32:30,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:30,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:32:30,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:32:30,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:30,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:32:30,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:30,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:30,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:30,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:30,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:30,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:32:30,347 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:30,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:30,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:32:30,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:30,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:30,348 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_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 [2021-11-20 23:32:30,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:30,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:30,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:30,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:30,636 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:30,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2021-11-20 23:32:30,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/data/9cf3b4db4/adead022723843a68609d7cf700e07f0/FLAG618a4d95d [2021-11-20 23:32:31,522 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:31,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2021-11-20 23:32:31,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/data/9cf3b4db4/adead022723843a68609d7cf700e07f0/FLAG618a4d95d [2021-11-20 23:32:31,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/data/9cf3b4db4/adead022723843a68609d7cf700e07f0 [2021-11-20 23:32:31,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:31,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:31,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:31,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:31,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:31,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:31" (1/1) ... [2021-11-20 23:32:31,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324968a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:31, skipping insertion in model container [2021-11-20 23:32:31,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:31" (1/1) ... [2021-11-20 23:32:32,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:32,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:32,438 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_1b45c9f0-dc9c-4025-b8c5-fb307676681d/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4491,4504] [2021-11-20 23:32:32,445 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_1b45c9f0-dc9c-4025-b8c5-fb307676681d/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4551,4564] [2021-11-20 23:32:33,494 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,495 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,495 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,496 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,498 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,513 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,514 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,517 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:33,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,041 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:32:34,044 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:32:34,047 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:32:34,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:32:34,050 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:32:34,051 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:32:34,054 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:32:34,055 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:32:34,057 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:32:34,059 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:32:34,307 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:32:34,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,756 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,790 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,823 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,825 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,825 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,826 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,826 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,827 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:34,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:34,974 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:35,000 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_1b45c9f0-dc9c-4025-b8c5-fb307676681d/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4491,4504] [2021-11-20 23:32:35,001 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_1b45c9f0-dc9c-4025-b8c5-fb307676681d/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4551,4564] [2021-11-20 23:32:35,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,063 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,065 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,066 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,066 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,071 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,071 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,071 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:32:35,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:32:35,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:32:35,107 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:32:35,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:32:35,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:32:35,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:32:35,109 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:32:35,109 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:32:35,110 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:32:35,141 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:32:35,274 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,275 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,282 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,286 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,287 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,300 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,301 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,302 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,302 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:32:35,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:35,675 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:35,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35 WrapperNode [2021-11-20 23:32:35,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:35,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:35,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:35,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:35,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:35,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:35,933 INFO L137 Inliner]: procedures = 774, calls = 2455, calls flagged for inlining = 68, calls inlined = 18, statements flattened = 945 [2021-11-20 23:32:35,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:35,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:35,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:35,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:35,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:35,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:35,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:35,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:36,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:36,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:36,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:36,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:36,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:36,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:36,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:36,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (1/1) ... [2021-11-20 23:32:36,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:36,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:36,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:36,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-20 23:32:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2021-11-20 23:32:36,179 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2021-11-20 23:32:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:32:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 23:32:36,179 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 23:32:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:32:36,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:32:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-20 23:32:36,180 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-20 23:32:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:32:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:32:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:36,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:32:36,181 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:32:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 23:32:36,181 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 23:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-20 23:32:36,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-20 23:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 23:32:36,182 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 23:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:32:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-20 23:32:36,183 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-20 23:32:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-20 23:32:36,183 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-20 23:32:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-20 23:32:36,183 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-20 23:32:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-20 23:32:36,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-20 23:32:36,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:32:36,185 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_get_entry_count [2021-11-20 23:32:36,187 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_get_entry_count [2021-11-20 23:32:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-20 23:32:36,188 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-20 23:32:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-20 23:32:36,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-20 23:32:36,190 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-20 23:32:36,190 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-20 23:32:36,190 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-20 23:32:36,190 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-20 23:32:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:32:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:32:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-20 23:32:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-20 23:32:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:32:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2021-11-20 23:32:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2021-11-20 23:32:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 23:32:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 23:32:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-20 23:32:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-20 23:32:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2021-11-20 23:32:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2021-11-20 23:32:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 23:32:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 23:32:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:32:36,665 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:36,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:36,827 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-20 23:32:36,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-20 23:32:37,911 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !true; [2021-11-20 23:32:37,912 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !true; [2021-11-20 23:32:37,912 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-20 23:32:37,912 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume !true; [2021-11-20 23:32:37,912 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##51: assume !true; [2021-11-20 23:32:37,967 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:32:38,095 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:32:38,095 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-20 23:32:38,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:38 BoogieIcfgContainer [2021-11-20 23:32:38,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:32:38,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:32:38,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:32:38,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:32:38,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:31" (1/3) ... [2021-11-20 23:32:38,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0a7542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:38, skipping insertion in model container [2021-11-20 23:32:38,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:35" (2/3) ... [2021-11-20 23:32:38,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0a7542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:38, skipping insertion in model container [2021-11-20 23:32:38,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:38" (3/3) ... [2021-11-20 23:32:38,108 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_eq_harness.i [2021-11-20 23:32:38,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:32:38,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:32:38,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:32:38,195 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 [2021-11-20 23:32:38,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:32:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 247 states, 139 states have (on average 1.223021582733813) internal successors, (170), 133 states have internal predecessors, (170), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 23:32:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 23:32:38,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:38,259 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:38,260 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2010727539, now seen corresponding path program 1 times [2021-11-20 23:32:38,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11317493] [2021-11-20 23:32:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:38,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:38,660 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:32:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548075948] [2021-11-20 23:32:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:38,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:38,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:38,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:32:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 2930 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:32:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-20 23:32:40,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:40,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11317493] [2021-11-20 23:32:40,029 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:32:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548075948] [2021-11-20 23:32:40,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548075948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:40,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:32:40,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913295999] [2021-11-20 23:32:40,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:40,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:32:40,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:32:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:32:40,078 INFO L87 Difference]: Start difference. First operand has 247 states, 139 states have (on average 1.223021582733813) internal successors, (170), 133 states have internal predecessors, (170), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-20 23:32:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:41,291 INFO L93 Difference]: Finished difference Result 496 states and 728 transitions. [2021-11-20 23:32:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) Word has length 213 [2021-11-20 23:32:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:41,315 INFO L225 Difference]: With dead ends: 496 [2021-11-20 23:32:41,315 INFO L226 Difference]: Without dead ends: 249 [2021-11-20 23:32:41,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:32:41,333 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 1 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:41,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1220 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 23:32:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-20 23:32:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-20 23:32:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 134 states have (on average 1.208955223880597) internal successors, (162), 135 states have internal predecessors, (162), 89 states have call successors, (89), 24 states have call predecessors, (89), 25 states have return successors, (89), 89 states have call predecessors, (89), 88 states have call successors, (89) [2021-11-20 23:32:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 340 transitions. [2021-11-20 23:32:41,419 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 340 transitions. Word has length 213 [2021-11-20 23:32:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:41,420 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 340 transitions. [2021-11-20 23:32:41,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-20 23:32:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 340 transitions. [2021-11-20 23:32:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-20 23:32:41,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:41,426 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:41,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:41,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 23:32:41,653 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1596290227, now seen corresponding path program 1 times [2021-11-20 23:32:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:41,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691345988] [2021-11-20 23:32:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:41,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-20 23:32:42,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:42,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691345988] [2021-11-20 23:32:42,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691345988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019709480] [2021-11-20 23:32:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:42,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:42,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:42,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:32:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:32:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-20 23:32:43,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:43,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019709480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:43,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:32:43,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-20 23:32:43,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303254775] [2021-11-20 23:32:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:43,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:32:43,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:32:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:32:43,488 INFO L87 Difference]: Start difference. First operand 249 states and 340 transitions. Second operand has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:32:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:44,992 INFO L93 Difference]: Finished difference Result 497 states and 694 transitions. [2021-11-20 23:32:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:32:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 229 [2021-11-20 23:32:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:44,999 INFO L225 Difference]: With dead ends: 497 [2021-11-20 23:32:44,999 INFO L226 Difference]: Without dead ends: 251 [2021-11-20 23:32:45,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:32:45,003 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:45,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1411 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 23:32:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-20 23:32:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-20 23:32:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 135 states have (on average 1.2074074074074075) internal successors, (163), 137 states have internal predecessors, (163), 89 states have call successors, (89), 24 states have call predecessors, (89), 26 states have return successors, (106), 89 states have call predecessors, (106), 88 states have call successors, (106) [2021-11-20 23:32:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 358 transitions. [2021-11-20 23:32:45,042 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 358 transitions. Word has length 229 [2021-11-20 23:32:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 358 transitions. [2021-11-20 23:32:45,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 23:32:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 358 transitions. [2021-11-20 23:32:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 23:32:45,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:45,050 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:45,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:45,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 23:32:45,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -648754902, now seen corresponding path program 1 times [2021-11-20 23:32:45,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099191866] [2021-11-20 23:32:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:45,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-11-20 23:32:45,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099191866] [2021-11-20 23:32:45,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099191866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314736181] [2021-11-20 23:32:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:45,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:45,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:45,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:45,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:32:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:32:46,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:46,591 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:32:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-20 23:32:47,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314736181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:47,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:32:47,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2021-11-20 23:32:47,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406462905] [2021-11-20 23:32:47,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:47,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:32:47,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:32:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:32:47,404 INFO L87 Difference]: Start difference. First operand 251 states and 358 transitions. Second operand has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2021-11-20 23:32:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:48,903 INFO L93 Difference]: Finished difference Result 510 states and 725 transitions. [2021-11-20 23:32:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:32:48,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) Word has length 235 [2021-11-20 23:32:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:48,913 INFO L225 Difference]: With dead ends: 510 [2021-11-20 23:32:48,913 INFO L226 Difference]: Without dead ends: 256 [2021-11-20 23:32:48,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:32:48,920 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 53 mSDsluCounter, 2912 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3016 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:48,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 3016 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 281 Unchecked, 1.4s Time] [2021-11-20 23:32:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-20 23:32:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-11-20 23:32:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 140 states have internal predecessors, (167), 90 states have call successors, (90), 26 states have call predecessors, (90), 26 states have return successors, (107), 89 states have call predecessors, (107), 89 states have call successors, (107) [2021-11-20 23:32:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2021-11-20 23:32:48,985 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 235 [2021-11-20 23:32:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:48,986 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2021-11-20 23:32:48,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2021-11-20 23:32:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2021-11-20 23:32:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-20 23:32:48,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:48,992 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:49,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:49,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:49,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:49,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1146539761, now seen corresponding path program 1 times [2021-11-20 23:32:49,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:49,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392313266] [2021-11-20 23:32:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:49,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2021-11-20 23:32:49,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392313266] [2021-11-20 23:32:49,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392313266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210604532] [2021-11-20 23:32:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:49,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:49,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:49,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:32:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 3043 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:32:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-20 23:32:50,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210604532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:50,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:32:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-20 23:32:50,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931906243] [2021-11-20 23:32:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:32:50,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:32:50,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:32:50,831 INFO L87 Difference]: Start difference. First operand 256 states and 364 transitions. Second operand has 6 states, 3 states have (on average 23.666666666666668) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-20 23:32:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:52,467 INFO L93 Difference]: Finished difference Result 478 states and 681 transitions. [2021-11-20 23:32:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:32:52,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 23.666666666666668) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 239 [2021-11-20 23:32:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:52,474 INFO L225 Difference]: With dead ends: 478 [2021-11-20 23:32:52,474 INFO L226 Difference]: Without dead ends: 256 [2021-11-20 23:32:52,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:32:52,476 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:52,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1411 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 23:32:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-20 23:32:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-11-20 23:32:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 140 states have internal predecessors, (167), 90 states have call successors, (90), 26 states have call predecessors, (90), 26 states have return successors, (106), 89 states have call predecessors, (106), 89 states have call successors, (106) [2021-11-20 23:32:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 363 transitions. [2021-11-20 23:32:52,527 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 363 transitions. Word has length 239 [2021-11-20 23:32:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:52,529 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 363 transitions. [2021-11-20 23:32:52,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 23.666666666666668) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-20 23:32:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 363 transitions. [2021-11-20 23:32:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-20 23:32:52,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:52,536 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:52,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:52,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:52,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:52,752 INFO L85 PathProgramCache]: Analyzing trace with hash -892501810, now seen corresponding path program 1 times [2021-11-20 23:32:52,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:52,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810777126] [2021-11-20 23:32:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:52,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-20 23:32:53,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:53,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810777126] [2021-11-20 23:32:53,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810777126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:53,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386188077] [2021-11-20 23:32:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:53,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:53,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:53,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:53,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:32:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 3067 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:32:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:54,109 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:32:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-20 23:32:54,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:54,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386188077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:54,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:32:54,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2021-11-20 23:32:54,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075703816] [2021-11-20 23:32:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:54,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:32:54,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:32:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:32:54,650 INFO L87 Difference]: Start difference. First operand 256 states and 363 transitions. Second operand has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) [2021-11-20 23:32:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:55,934 INFO L93 Difference]: Finished difference Result 489 states and 694 transitions. [2021-11-20 23:32:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:32:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) Word has length 245 [2021-11-20 23:32:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:55,941 INFO L225 Difference]: With dead ends: 489 [2021-11-20 23:32:55,941 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 23:32:55,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:32:55,943 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 53 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:55,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1965 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 140 Unchecked, 1.2s Time] [2021-11-20 23:32:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 23:32:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 256. [2021-11-20 23:32:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 140 states have internal predecessors, (167), 90 states have call successors, (90), 26 states have call predecessors, (90), 26 states have return successors, (106), 89 states have call predecessors, (106), 89 states have call successors, (106) [2021-11-20 23:32:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 363 transitions. [2021-11-20 23:32:55,975 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 363 transitions. Word has length 245 [2021-11-20 23:32:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:55,976 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 363 transitions. [2021-11-20 23:32:55,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) [2021-11-20 23:32:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 363 transitions. [2021-11-20 23:32:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-20 23:32:55,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:55,982 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:56,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:56,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:56,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1352459093, now seen corresponding path program 2 times [2021-11-20 23:32:56,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:56,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365416485] [2021-11-20 23:32:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:56,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 72 proven. 24 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-11-20 23:32:57,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365416485] [2021-11-20 23:32:57,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365416485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:57,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192120531] [2021-11-20 23:32:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:32:57,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:57,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:57,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:57,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:32:58,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:32:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:32:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 23:32:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-20 23:32:58,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:58,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192120531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:58,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:32:58,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2021-11-20 23:32:58,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507847276] [2021-11-20 23:32:58,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:58,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:32:58,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:32:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:32:58,782 INFO L87 Difference]: Start difference. First operand 256 states and 363 transitions. Second operand has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-20 23:32:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:59,691 INFO L93 Difference]: Finished difference Result 510 states and 724 transitions. [2021-11-20 23:32:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:59,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 249 [2021-11-20 23:32:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:59,694 INFO L225 Difference]: With dead ends: 510 [2021-11-20 23:32:59,694 INFO L226 Difference]: Without dead ends: 258 [2021-11-20 23:32:59,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:32:59,697 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 0 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:59,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1122 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 23:32:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-20 23:32:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-11-20 23:32:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 140 states have (on average 1.2) internal successors, (168), 142 states have internal predecessors, (168), 90 states have call successors, (90), 26 states have call predecessors, (90), 27 states have return successors, (107), 89 states have call predecessors, (107), 89 states have call successors, (107) [2021-11-20 23:32:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 365 transitions. [2021-11-20 23:32:59,724 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 365 transitions. Word has length 249 [2021-11-20 23:32:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:59,726 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 365 transitions. [2021-11-20 23:32:59,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-20 23:32:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 365 transitions. [2021-11-20 23:32:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-20 23:32:59,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:59,729 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:59,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:59,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:59,944 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1607059447, now seen corresponding path program 1 times [2021-11-20 23:32:59,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564614318] [2021-11-20 23:32:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:59,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:00,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:00,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254018100] [2021-11-20 23:33:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:00,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:00,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:00,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:33:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 3240 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:33:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-20 23:33:01,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:01,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564614318] [2021-11-20 23:33:01,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:33:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254018100] [2021-11-20 23:33:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254018100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:01,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:01,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:33:01,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757899793] [2021-11-20 23:33:01,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:33:01,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:33:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:01,174 INFO L87 Difference]: Start difference. First operand 258 states and 365 transitions. Second operand has 6 states, 3 states have (on average 21.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:33:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:02,461 INFO L93 Difference]: Finished difference Result 434 states and 626 transitions. [2021-11-20 23:33:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 21.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 259 [2021-11-20 23:33:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:02,466 INFO L225 Difference]: With dead ends: 434 [2021-11-20 23:33:02,466 INFO L226 Difference]: Without dead ends: 258 [2021-11-20 23:33:02,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:02,468 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:02,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1411 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:33:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-20 23:33:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-11-20 23:33:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 140 states have (on average 1.2) internal successors, (168), 142 states have internal predecessors, (168), 90 states have call successors, (90), 26 states have call predecessors, (90), 27 states have return successors, (106), 89 states have call predecessors, (106), 89 states have call successors, (106) [2021-11-20 23:33:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 364 transitions. [2021-11-20 23:33:02,487 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 364 transitions. Word has length 259 [2021-11-20 23:33:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:02,488 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 364 transitions. [2021-11-20 23:33:02,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 21.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:33:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 364 transitions. [2021-11-20 23:33:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-20 23:33:02,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:02,491 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:02,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:02,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 23:33:02,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -592834310, now seen corresponding path program 1 times [2021-11-20 23:33:02,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:02,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96269650] [2021-11-20 23:33:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:02,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:02,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:02,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983684457] [2021-11-20 23:33:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:02,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:02,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:02,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:33:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 23:33:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-11-20 23:33:03,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:03,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96269650] [2021-11-20 23:33:03,863 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:33:03,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983684457] [2021-11-20 23:33:03,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983684457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:03,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:03,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:33:03,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963685238] [2021-11-20 23:33:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:03,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:33:03,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:33:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:03,864 INFO L87 Difference]: Start difference. First operand 258 states and 364 transitions. Second operand has 7 states, 4 states have (on average 16.25) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-20 23:33:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:04,767 INFO L93 Difference]: Finished difference Result 433 states and 624 transitions. [2021-11-20 23:33:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:33:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 16.25) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 265 [2021-11-20 23:33:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:04,769 INFO L225 Difference]: With dead ends: 433 [2021-11-20 23:33:04,770 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 23:33:04,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:04,771 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 0 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:04,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1707 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 23:33:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 23:33:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-20 23:33:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 141 states have (on average 1.198581560283688) internal successors, (169), 144 states have internal predecessors, (169), 90 states have call successors, (90), 26 states have call predecessors, (90), 28 states have return successors, (109), 89 states have call predecessors, (109), 89 states have call successors, (109) [2021-11-20 23:33:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 368 transitions. [2021-11-20 23:33:04,788 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 368 transitions. Word has length 265 [2021-11-20 23:33:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:04,789 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 368 transitions. [2021-11-20 23:33:04,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 16.25) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-20 23:33:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 368 transitions. [2021-11-20 23:33:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-20 23:33:04,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:04,792 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:04,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:05,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 23:33:05,020 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -587053577, now seen corresponding path program 1 times [2021-11-20 23:33:05,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:05,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611499493] [2021-11-20 23:33:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:05,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2021-11-20 23:33:05,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:05,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611499493] [2021-11-20 23:33:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611499493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:05,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:05,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:33:05,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339459211] [2021-11-20 23:33:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:05,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:33:05,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:33:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:05,298 INFO L87 Difference]: Start difference. First operand 260 states and 368 transitions. Second operand has 7 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-20 23:33:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:07,252 INFO L93 Difference]: Finished difference Result 518 states and 739 transitions. [2021-11-20 23:33:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:33:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) Word has length 279 [2021-11-20 23:33:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:07,255 INFO L225 Difference]: With dead ends: 518 [2021-11-20 23:33:07,255 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 23:33:07,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:33:07,258 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 1 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:07,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1829 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:33:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 23:33:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-20 23:33:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 90 states have call successors, (90), 26 states have call predecessors, (90), 28 states have return successors, (109), 89 states have call predecessors, (109), 89 states have call successors, (109) [2021-11-20 23:33:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 367 transitions. [2021-11-20 23:33:07,311 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 367 transitions. Word has length 279 [2021-11-20 23:33:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:07,312 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 367 transitions. [2021-11-20 23:33:07,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-20 23:33:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 367 transitions. [2021-11-20 23:33:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-20 23:33:07,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:07,315 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:07,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:33:07,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1721776791, now seen corresponding path program 2 times [2021-11-20 23:33:07,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:07,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509005222] [2021-11-20 23:33:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:07,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:07,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:07,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36830762] [2021-11-20 23:33:07,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:33:07,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:07,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:33:08,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 23:33:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:33:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 23:33:08,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-11-20 23:33:09,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:09,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509005222] [2021-11-20 23:33:09,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:33:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36830762] [2021-11-20 23:33:09,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36830762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:09,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:09,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:33:09,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856919182] [2021-11-20 23:33:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:09,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:33:09,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:33:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:09,067 INFO L87 Difference]: Start difference. First operand 260 states and 367 transitions. Second operand has 7 states, 4 states have (on average 16.75) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-20 23:33:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:10,485 INFO L93 Difference]: Finished difference Result 429 states and 615 transitions. [2021-11-20 23:33:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:33:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 16.75) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 271 [2021-11-20 23:33:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:10,489 INFO L225 Difference]: With dead ends: 429 [2021-11-20 23:33:10,489 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 23:33:10,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:10,491 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 0 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:10,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1706 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 23:33:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 23:33:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-20 23:33:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 90 states have call successors, (90), 26 states have call predecessors, (90), 28 states have return successors, (108), 89 states have call predecessors, (108), 89 states have call successors, (108) [2021-11-20 23:33:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 366 transitions. [2021-11-20 23:33:10,508 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 366 transitions. Word has length 271 [2021-11-20 23:33:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:10,509 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 366 transitions. [2021-11-20 23:33:10,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 16.75) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-20 23:33:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 366 transitions. [2021-11-20 23:33:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-20 23:33:10,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:10,512 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:10,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:10,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:33:10,728 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -747978892, now seen corresponding path program 3 times [2021-11-20 23:33:10,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649517779] [2021-11-20 23:33:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:10,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:10,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567949732] [2021-11-20 23:33:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:33:10,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:10,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:10,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:10,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:33:11,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:33:11,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:33:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 23:33:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-20 23:33:12,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:12,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649517779] [2021-11-20 23:33:12,413 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:33:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567949732] [2021-11-20 23:33:12,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567949732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:12,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:12,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:33:12,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905032901] [2021-11-20 23:33:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:12,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:33:12,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:33:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:33:12,416 INFO L87 Difference]: Start difference. First operand 260 states and 366 transitions. Second operand has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 5 states have call successors, (38) [2021-11-20 23:33:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:13,286 INFO L93 Difference]: Finished difference Result 442 states and 650 transitions. [2021-11-20 23:33:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:33:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 5 states have call successors, (38) Word has length 277 [2021-11-20 23:33:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:13,289 INFO L225 Difference]: With dead ends: 442 [2021-11-20 23:33:13,289 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 23:33:13,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:33:13,291 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 94 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:13,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1294 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 164 Invalid, 0 Unknown, 59 Unchecked, 0.8s Time] [2021-11-20 23:33:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 23:33:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2021-11-20 23:33:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 143 states have internal predecessors, (168), 89 states have call successors, (89), 26 states have call predecessors, (89), 28 states have return successors, (106), 89 states have call predecessors, (106), 88 states have call successors, (106) [2021-11-20 23:33:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 363 transitions. [2021-11-20 23:33:13,310 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 363 transitions. Word has length 277 [2021-11-20 23:33:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:13,310 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 363 transitions. [2021-11-20 23:33:13,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 5 states have call successors, (38) [2021-11-20 23:33:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 363 transitions. [2021-11-20 23:33:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-20 23:33:13,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:13,313 INFO L514 BasicCegarLoop]: trace histogram [17, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:13,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:13,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:13,528 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash 262878363, now seen corresponding path program 2 times [2021-11-20 23:33:13,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803136348] [2021-11-20 23:33:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:13,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:13,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:13,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759743495] [2021-11-20 23:33:13,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:33:13,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:13,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:13,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:13,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:33:14,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 23:33:14,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:33:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2545 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:33:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-20 23:33:15,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:15,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803136348] [2021-11-20 23:33:15,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:33:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759743495] [2021-11-20 23:33:15,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759743495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:15,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:15,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:33:15,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914953019] [2021-11-20 23:33:15,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:15,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:33:15,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:33:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:15,340 INFO L87 Difference]: Start difference. First operand 259 states and 363 transitions. Second operand has 6 states, 3 states have (on average 23.333333333333332) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-20 23:33:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:16,579 INFO L93 Difference]: Finished difference Result 433 states and 617 transitions. [2021-11-20 23:33:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 23.333333333333332) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 289 [2021-11-20 23:33:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:16,583 INFO L225 Difference]: With dead ends: 433 [2021-11-20 23:33:16,583 INFO L226 Difference]: Without dead ends: 259 [2021-11-20 23:33:16,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:16,585 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:16,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1410 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 23:33:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-20 23:33:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-11-20 23:33:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 143 states have internal predecessors, (168), 89 states have call successors, (89), 26 states have call predecessors, (89), 28 states have return successors, (105), 89 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-20 23:33:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2021-11-20 23:33:16,602 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 289 [2021-11-20 23:33:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:16,603 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2021-11-20 23:33:16,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 23.333333333333332) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-20 23:33:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2021-11-20 23:33:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-20 23:33:16,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:16,606 INFO L514 BasicCegarLoop]: trace histogram [17, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:16,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 23:33:16,844 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 746237559, now seen corresponding path program 3 times [2021-11-20 23:33:16,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562303401] [2021-11-20 23:33:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:16,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:16,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552673821] [2021-11-20 23:33:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:33:16,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:16,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:16,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b45c9f0-dc9c-4025-b8c5-fb307676681d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:33:17,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:33:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:33:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 23:33:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 222 proven. 7 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-20 23:33:23,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 35 proven. 8 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-11-20 23:33:25,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562303401] [2021-11-20 23:33:25,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:33:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552673821] [2021-11-20 23:33:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552673821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:33:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299610167] [2021-11-20 23:33:25,365 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-20 23:33:25,365 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:33:25,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:33:25,379 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:33:25,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:33:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:33:29,906 INFO L244 Elim1Store]: Index analysis took 374 ms [2021-11-20 23:34:06,558 WARN L227 SmtUtils]: Spent 36.58s 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) [2021-11-20 23:34:06,567 INFO L354 Elim1Store]: treesize reduction 3528, result has 33.3 percent of original size [2021-11-20 23:34:06,572 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 [2021-11-20 23:34:37,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:34:37,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19503 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 0 case distinctions, treesize of input 992 treesize of output 1582 [2021-11-20 23:36:10,629 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 [2021-11-20 23:36:10,650 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 [2021-11-20 23:36:10,744 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 [2021-11-20 23:36:10,759 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 [2021-11-20 23:36:10,867 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 25 treesize of output 24 [2021-11-20 23:36:10,871 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 24 treesize of output 21 [2021-11-20 23:36:11,029 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:11,039 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:36:11,060 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:11,098 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:11,712 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 [2021-11-20 23:36:11,723 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 [2021-11-20 23:36:11,851 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 [2021-11-20 23:36:11,859 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 [2021-11-20 23:36:12,023 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:36:12,023 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 31 treesize of output 33 [2021-11-20 23:36:12,258 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 25 treesize of output 22 [2021-11-20 23:36:12,263 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 19 treesize of output 18 [2021-11-20 23:36:12,398 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:36:12,415 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:12,424 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:12,452 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:12,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2021-11-20 23:36:12,580 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 18 treesize of output 16 [2021-11-20 23:36:12,599 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 13 treesize of output 11 [2021-11-20 23:36:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2021-11-20 23:36:12,718 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 18 treesize of output 16 [2021-11-20 23:36:12,723 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 13 treesize of output 11 [2021-11-20 23:36:12,763 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:36:12,763 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 31 treesize of output 33 [2021-11-20 23:36:12,906 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 [2021-11-20 23:36:12,914 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 [2021-11-20 23:36:13,093 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 [2021-11-20 23:36:13,102 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 [2021-11-20 23:36:15,593 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 [2021-11-20 23:36:15,608 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 [2021-11-20 23:36:15,721 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:36:15,721 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 30 treesize of output 26 [2021-11-20 23:36:15,733 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 13 treesize of output 11 [2021-11-20 23:36:16,214 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:36:16,214 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 30 treesize of output 26 [2021-11-20 23:36:16,229 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 13 treesize of output 11 [2021-11-20 23:36:16,825 INFO L354 Elim1Store]: treesize reduction 78, result has 31.0 percent of original size [2021-11-20 23:36:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 168 [2021-11-20 23:36:16,867 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:36:16,868 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 168 treesize of output 168 [2021-11-20 23:36:17,841 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:36:17,841 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 1 case distinctions, treesize of input 35 treesize of output 19 [2021-11-20 23:36:17,938 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-20 23:36:17,939 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 1 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 23:36:18,037 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-20 23:36:18,038 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 1 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 23:37:56,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:39:47,731 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_allocated_hash_table with input of size 2438 for LOIs