./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_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_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/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_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/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_9b39f38f-2dd5-407a-ad24-b5c88314a370/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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:30:11,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:30:11,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:30:11,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:30:11,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:30:11,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:30:11,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:30:11,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:30:11,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:30:11,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:30:11,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:30:11,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:30:11,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:30:11,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:30:11,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:30:11,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:30:11,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:30:11,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:30:11,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:30:11,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:30:11,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:30:11,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:30:11,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:30:11,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:30:11,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:30:11,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:30:11,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:30:11,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:30:11,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:30:11,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:30:11,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:30:11,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:30:11,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:30:11,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:30:11,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:30:11,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:30:11,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:30:11,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:30:11,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:30:11,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:30:11,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:30:11,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:30:11,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:30:11,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:30:11,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:30:11,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:30:11,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:30:11,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:30:11,286 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:30:11,286 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:30:11,287 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:30:11,287 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:30:11,287 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:30:11,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:30:11,287 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:30:11,288 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:30:11,288 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:30:11,288 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:30:11,288 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:30:11,289 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:30:11,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:30:11,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:30:11,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:30:11,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:30:11,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:30:11,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:30:11,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:30:11,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:30:11,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:30:11,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:30:11,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:30:11,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:30:11,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:30:11,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:30:11,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:30:11,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:30:11,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:30:11,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:30:11,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:30:11,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:30:11,293 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_9b39f38f-2dd5-407a-ad24-b5c88314a370/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-21 00:30:11,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:30:11,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:30:11,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:30:11,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:30:11,605 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:30:11,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-21 00:30:11,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/data/9297a7d35/5c8cf542320749d88d9629c4bd6d49dc/FLAG37716b32c [2021-11-21 00:30:12,491 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:30:12,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-21 00:30:12,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/data/9297a7d35/5c8cf542320749d88d9629c4bd6d49dc/FLAG37716b32c [2021-11-21 00:30:13,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/data/9297a7d35/5c8cf542320749d88d9629c4bd6d49dc [2021-11-21 00:30:13,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:30:13,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:30:13,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:30:13,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:30:13,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:30:13,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:30:13" (1/1) ... [2021-11-21 00:30:13,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c78244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:13, skipping insertion in model container [2021-11-21 00:30:13,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:30:13" (1/1) ... [2021-11-21 00:30:13,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:30:13,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:30:13,564 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_9b39f38f-2dd5-407a-ad24-b5c88314a370/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-21 00:30:13,570 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_9b39f38f-2dd5-407a-ad24-b5c88314a370/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-21 00:30:14,742 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,750 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,750 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:14,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,148 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:30:15,149 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:30:15,151 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:30:15,152 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:30:15,153 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:30:15,154 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:30:15,155 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:30:15,156 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:30:15,157 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:30:15,158 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:30:15,333 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:30:15,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:30:15,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:30:15,407 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_9b39f38f-2dd5-407a-ad24-b5c88314a370/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-21 00:30:15,408 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_9b39f38f-2dd5-407a-ad24-b5c88314a370/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-21 00:30:15,451 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,452 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,452 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,453 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,453 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,461 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,461 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,463 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,463 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,465 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,465 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,466 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,466 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:30:15,504 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:30:15,505 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:30:15,505 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:30:15,506 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:30:15,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:30:15,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:30:15,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:30:15,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:30:15,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:30:15,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:30:15,532 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:30:15,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:30:15,739 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:30:15,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15 WrapperNode [2021-11-21 00:30:15,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:30:15,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:30:15,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:30:15,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:30:15,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,909 INFO L137 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2021-11-21 00:30:15,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:30:15,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:30:15,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:30:15,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:30:15,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:30:15,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:30:15,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:30:15,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:30:15,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (1/1) ... [2021-11-21 00:30:15,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:30:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:16,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:30:16,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:30:16,078 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2021-11-21 00:30:16,078 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2021-11-21 00:30:16,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:30:16,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:30:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:30:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:30:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:30:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:30:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 00:30:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 00:30:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:30:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:30:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:30:16,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:30:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-21 00:30:16,080 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-21 00:30:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:30:16,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:30:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:30:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:30:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:30:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:30:16,082 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:30:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-21 00:30:16,082 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-21 00:30:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:30:16,269 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:30:16,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:30:16,636 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:30:16,737 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:30:16,737 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:30:16,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:30:16 BoogieIcfgContainer [2021-11-21 00:30:16,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:30:16,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:30:16,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:30:16,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:30:16,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:30:13" (1/3) ... [2021-11-21 00:30:16,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61caf876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:30:16, skipping insertion in model container [2021-11-21 00:30:16,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:30:15" (2/3) ... [2021-11-21 00:30:16,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61caf876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:30:16, skipping insertion in model container [2021-11-21 00:30:16,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:30:16" (3/3) ... [2021-11-21 00:30:16,752 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-11-21 00:30:16,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:30:16,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:30:16,857 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:30:16,871 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:30:16,871 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:30:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-21 00:30:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:30:16,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:16,907 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:30:16,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:30:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash -208090152, now seen corresponding path program 1 times [2021-11-21 00:30:16,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:16,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074360520] [2021-11-21 00:30:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:16,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:30:17,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:17,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074360520] [2021-11-21 00:30:17,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074360520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:30:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442746335] [2021-11-21 00:30:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:17,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:17,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:30:17,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:30:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:17,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 00:30:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:30:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:17,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:30:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:30:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-21 00:30:18,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 00:30:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:30:21,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:30:21,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442746335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:30:21,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:30:21,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2021-11-21 00:30:21,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250626207] [2021-11-21 00:30:21,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:30:21,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:30:21,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:30:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:30:21,273 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:30:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:30:21,627 INFO L93 Difference]: Finished difference Result 153 states and 216 transitions. [2021-11-21 00:30:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:30:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 52 [2021-11-21 00:30:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:30:21,644 INFO L225 Difference]: With dead ends: 153 [2021-11-21 00:30:21,644 INFO L226 Difference]: Without dead ends: 93 [2021-11-21 00:30:21,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:30:21,661 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:30:21,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 274 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-21 00:30:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-21 00:30:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-11-21 00:30:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 43 states have internal predecessors, (50), 29 states have call successors, (29), 12 states have call predecessors, (29), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 00:30:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2021-11-21 00:30:21,714 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 52 [2021-11-21 00:30:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:30:21,715 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2021-11-21 00:30:21,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:30:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2021-11-21 00:30:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 00:30:21,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:30:21,720 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:30:21,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:30:21,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:30:21,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:30:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:30:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 575190234, now seen corresponding path program 1 times [2021-11-21 00:30:21,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:30:21,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330137445] [2021-11-21 00:30:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:21,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:30:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:30:22,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330137445] [2021-11-21 00:30:22,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330137445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:30:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825744065] [2021-11-21 00:30:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:30:22,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:30:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:30:22,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:30:22,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:30:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:30:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-21 00:30:22,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:30:22,408 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 [2021-11-21 00:30:22,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:30:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:30:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,840 INFO L354 Elim1Store]: treesize reduction 78, result has 36.1 percent of original size [2021-11-21 00:30:22,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 106 [2021-11-21 00:30:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:22,890 INFO L354 Elim1Store]: treesize reduction 86, result has 29.5 percent of original size [2021-11-21 00:30:22,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 103 [2021-11-21 00:30:22,990 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:30:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:30:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,209 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-21 00:30:23,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 185 treesize of output 139 [2021-11-21 00:30:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:23,297 INFO L354 Elim1Store]: treesize reduction 310, result has 15.8 percent of original size [2021-11-21 00:30:23,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 178 treesize of output 160 [2021-11-21 00:30:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:30:30,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:30:40,481 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (+ |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) .cse2) 0)) (not (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) .cse2) 0))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset| 0))) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (let ((.cse5 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (or (not (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|) 0)) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse5 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|) 0))))) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0#1.offset|)) 0))) is different from false [2021-11-21 00:30:50,148 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:30:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 609094 treesize of output 607014 [2021-11-21 00:31:28,147 WARN L227 SmtUtils]: Spent 37.99s on a formula simplification. DAG size of input: 1960 DAG size of output: 1960 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:31:28,371 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:31:28,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1093658 treesize of output 1091722 [2021-11-21 00:32:07,157 WARN L227 SmtUtils]: Spent 38.78s on a formula simplification. DAG size of input: 2873 DAG size of output: 2865 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:32:07,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:32:07,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [720006326] [2021-11-21 00:32:07,303 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:32:07,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:32:07,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:32:07,314 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:32:07,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:32:07,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:07,464 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:32:07,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:32:07,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:07,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:32:09,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:32:09,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:09,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:32:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:32:10,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:32:10,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,441 INFO L354 Elim1Store]: treesize reduction 82, result has 35.9 percent of original size [2021-11-21 00:32:10,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:32:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:10,574 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:32:10,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:32:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:32:10,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:10,790 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:32:10,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:32:10,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:10,986 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:32:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:32:11,166 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:32:11,177 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:32:11,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:11,686 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:32:11,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:32:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:11,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:11,942 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:32:11,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 503 treesize of output 519 [2021-11-21 00:32:12,252 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:32:12,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 552 treesize of output 642 [2021-11-21 00:32:12,685 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:32:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 636 treesize of output 717 [2021-11-21 00:32:12,767 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 00:32:12,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 00:32:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 00:32:12,933 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:32:12,936 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 673 treesize of output 621 [2021-11-21 00:32:22,692 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:32:22,693 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 133 treesize of output 120 [2021-11-21 00:32:22,732 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:32:22,733 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 177 treesize of output 146 [2021-11-21 00:32:22,776 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:32:22,777 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 192 treesize of output 140 [2021-11-21 00:32:22,812 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:32:22,812 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 128 treesize of output 76 [2021-11-21 00:32:22,992 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 [2021-11-21 00:32:23,039 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 [2021-11-21 00:32:23,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:23,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:32:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:32:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:25,204 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_back with input of size 25 for LOIs [2021-11-21 00:32:26,556 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 50 for LOIs [2021-11-21 00:32:27,655 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:32:28,825 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:32:28,865 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:32:28,967 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:32:49,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [720006326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:49,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:49,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 24 [2021-11-21 00:32:49,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182260229] [2021-11-21 00:32:49,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:32:49,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:32:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1431, Unknown=9, NotChecked=76, Total=1640 [2021-11-21 00:32:49,016 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 21 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:32:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:50,224 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2021-11-21 00:32:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:32:50,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2021-11-21 00:32:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:50,227 INFO L225 Difference]: With dead ends: 143 [2021-11-21 00:32:50,228 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 00:32:50,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=130, Invalid=1505, Unknown=9, NotChecked=78, Total=1722 [2021-11-21 00:32:50,231 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:50,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 408 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 582 Invalid, 0 Unknown, 137 Unchecked, 0.8s Time] [2021-11-21 00:32:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 00:32:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 00:32:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 1.173913043478261) internal successors, (54), 48 states have internal predecessors, (54), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 00:32:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-21 00:32:50,256 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 53 [2021-11-21 00:32:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:50,256 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-21 00:32:50,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:32:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-21 00:32:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:32:50,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:50,260 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:32:50,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:50,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 00:32:50,475 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -127929068, now seen corresponding path program 1 times [2021-11-21 00:32:50,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:50,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330389211] [2021-11-21 00:32:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:50,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:32:50,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:50,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330389211] [2021-11-21 00:32:50,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330389211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:50,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922034598] [2021-11-21 00:32:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:50,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:50,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:50,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:50,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:32:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:32:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:50,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:50,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922034598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:50,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-21 00:32:50,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988921812] [2021-11-21 00:32:50,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:50,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:32:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:32:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:32:50,969 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 00:32:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:51,196 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2021-11-21 00:32:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:32:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 54 [2021-11-21 00:32:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:51,201 INFO L225 Difference]: With dead ends: 150 [2021-11-21 00:32:51,202 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 00:32:51,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:32:51,206 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 45 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:51,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 399 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:32:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 00:32:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 00:32:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 00:32:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2021-11-21 00:32:51,231 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 54 [2021-11-21 00:32:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:51,231 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2021-11-21 00:32:51,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 00:32:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2021-11-21 00:32:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 00:32:51,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:51,234 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:32:51,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:51,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 00:32:51,453 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash 655010460, now seen corresponding path program 1 times [2021-11-21 00:32:51,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:51,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430338706] [2021-11-21 00:32:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:51,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:32:51,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430338706] [2021-11-21 00:32:51,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430338706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029843419] [2021-11-21 00:32:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:51,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:51,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:51,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:51,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:32:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:32:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:51,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:51,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029843419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:51,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:51,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-21 00:32:51,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053151077] [2021-11-21 00:32:51,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:51,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:32:51,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:32:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:32:51,979 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 00:32:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:52,254 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2021-11-21 00:32:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:32:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2021-11-21 00:32:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:52,263 INFO L225 Difference]: With dead ends: 159 [2021-11-21 00:32:52,263 INFO L226 Difference]: Without dead ends: 98 [2021-11-21 00:32:52,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:32:52,264 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:52,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 453 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:32:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-21 00:32:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-11-21 00:32:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 00:32:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2021-11-21 00:32:52,285 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56 [2021-11-21 00:32:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:52,286 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2021-11-21 00:32:52,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 00:32:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2021-11-21 00:32:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 00:32:52,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:52,289 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:32:52,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:52,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:52,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -529874177, now seen corresponding path program 1 times [2021-11-21 00:32:52,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:52,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140298558] [2021-11-21 00:32:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:52,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 00:32:52,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140298558] [2021-11-21 00:32:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140298558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117274559] [2021-11-21 00:32:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:52,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:52,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:52,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:52,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:32:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:32:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:32:52,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:52,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117274559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:52,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:52,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-21 00:32:52,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932422573] [2021-11-21 00:32:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:52,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:32:52,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:32:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:32:52,961 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 00:32:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:53,022 INFO L93 Difference]: Finished difference Result 155 states and 205 transitions. [2021-11-21 00:32:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:32:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 58 [2021-11-21 00:32:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:53,025 INFO L225 Difference]: With dead ends: 155 [2021-11-21 00:32:53,025 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 00:32:53,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:32:53,027 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:53,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:32:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 00:32:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2021-11-21 00:32:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 00:32:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-11-21 00:32:53,047 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 58 [2021-11-21 00:32:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:53,048 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-11-21 00:32:53,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 00:32:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-11-21 00:32:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:32:53,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:53,050 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:32:53,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:53,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:53,265 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash 600033731, now seen corresponding path program 1 times [2021-11-21 00:32:53,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:53,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619763805] [2021-11-21 00:32:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:53,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:32:53,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619763805] [2021-11-21 00:32:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619763805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:53,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540208768] [2021-11-21 00:32:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:53,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:53,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:53,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:32:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:53,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:32:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:53,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:53,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540208768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:53,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:53,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 13 [2021-11-21 00:32:53,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329732846] [2021-11-21 00:32:53,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:53,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:32:53,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:53,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:32:53,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:32:53,807 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 11 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 00:32:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:54,082 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2021-11-21 00:32:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:32:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 61 [2021-11-21 00:32:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:54,085 INFO L225 Difference]: With dead ends: 154 [2021-11-21 00:32:54,085 INFO L226 Difference]: Without dead ends: 95 [2021-11-21 00:32:54,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:32:54,086 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:54,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 555 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:32:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-21 00:32:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-11-21 00:32:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 00:32:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2021-11-21 00:32:54,106 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 61 [2021-11-21 00:32:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:54,107 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2021-11-21 00:32:54,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 00:32:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2021-11-21 00:32:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:32:54,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:54,109 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:32:54,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:54,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:54,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash 147591051, now seen corresponding path program 1 times [2021-11-21 00:32:54,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975891074] [2021-11-21 00:32:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:54,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 00:32:54,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975891074] [2021-11-21 00:32:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975891074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124363564] [2021-11-21 00:32:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:54,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:54,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:54,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:54,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:32:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-21 00:32:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:54,728 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 6 treesize of output 5 [2021-11-21 00:32:54,969 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:32:54,969 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 29 treesize of output 17 [2021-11-21 00:32:54,984 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:32:54,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:32:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:55,083 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:32:55,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 47 [2021-11-21 00:32:56,472 INFO L354 Elim1Store]: treesize reduction 183, result has 0.5 percent of original size [2021-11-21 00:32:56,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 1 [2021-11-21 00:32:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:32:56,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:00,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1624 treesize of output 1608 [2021-11-21 00:33:00,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124363564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [699755348] [2021-11-21 00:33:00,953 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 00:33:00,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:00,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:00,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:00,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,076 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:33:01,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:33:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:33:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:33:03,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:33:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:33:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:33:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:33:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:03,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:03,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:03,642 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:33:03,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:33:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:03,786 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:33:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:33:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,054 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:33:04,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:33:04,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,325 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:33:04,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:33:04,455 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:33:04,456 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:33:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:04,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:04,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:04,972 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:33:04,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:33:05,322 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:33:05,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 503 treesize of output 584 [2021-11-21 00:33:05,753 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:33:05,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 584 treesize of output 674 [2021-11-21 00:33:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:05,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:06,048 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:33:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 668 treesize of output 684 [2021-11-21 00:33:06,184 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 00:33:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 00:33:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:06,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 00:33:06,311 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:33:06,311 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 673 treesize of output 621 [2021-11-21 00:33:16,907 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:33:16,908 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 133 treesize of output 120 [2021-11-21 00:33:16,938 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:33:16,938 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 166 treesize of output 132 [2021-11-21 00:33:16,967 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:33:16,967 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 120 treesize of output 86 [2021-11-21 00:33:16,989 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:33:16,989 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 73 treesize of output 54 [2021-11-21 00:33:17,054 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 [2021-11-21 00:33:17,092 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 [2021-11-21 00:33:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:17,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:17,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:17,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:33:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:33:19,110 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_back with input of size 25 for LOIs [2021-11-21 00:33:21,556 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 49 for LOIs [2021-11-21 00:33:22,232 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:33:27,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:33:27,831 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:33:27,927 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:33:28,482 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [699755348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:32,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:33:32,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 14] total 50 [2021-11-21 00:33:32,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068416151] [2021-11-21 00:33:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:32,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:33:32,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:33:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3428, Unknown=2, NotChecked=0, Total=3660 [2021-11-21 00:33:32,488 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 29 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-21 00:33:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:34,716 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2021-11-21 00:33:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-21 00:33:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 63 [2021-11-21 00:33:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:34,718 INFO L225 Difference]: With dead ends: 163 [2021-11-21 00:33:34,718 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 00:33:34,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=314, Invalid=4106, Unknown=2, NotChecked=0, Total=4422 [2021-11-21 00:33:34,721 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 100 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:34,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 237 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 599 Invalid, 0 Unknown, 216 Unchecked, 0.8s Time] [2021-11-21 00:33:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 00:33:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-11-21 00:33:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 53 states have internal predecessors, (58), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 00:33:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-11-21 00:33:34,740 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 63 [2021-11-21 00:33:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:34,740 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-11-21 00:33:34,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-21 00:33:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-11-21 00:33:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:33:34,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:34,742 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:33:34,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:33:34,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:33:34,952 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash -208497742, now seen corresponding path program 1 times [2021-11-21 00:33:34,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:34,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548374062] [2021-11-21 00:33:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:34,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:33:35,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548374062] [2021-11-21 00:33:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548374062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421132901] [2021-11-21 00:33:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:35,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:35,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:35,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:33:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:35,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 00:33:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:35,544 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 6 treesize of output 5 [2021-11-21 00:33:35,823 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:33:35,823 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 11 treesize of output 11 [2021-11-21 00:33:35,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:35,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:33:35,921 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-21 00:33:35,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 53 [2021-11-21 00:33:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:33:39,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:48,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1669 treesize of output 1653 [2021-11-21 00:33:49,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421132901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450963714] [2021-11-21 00:33:49,435 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 00:33:49,435 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:49,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:49,436 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:49,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,591 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:33:49,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:33:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,822 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:33:49,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:33:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:33:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:33:52,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:33:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:33:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:33:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:52,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:52,777 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:33:52,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:33:52,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:52,971 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:33:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:33:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,309 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:33:53,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:33:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:53,720 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:33:53,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:33:53,871 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:33:53,872 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:33:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:54,412 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:33:54,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:33:54,873 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:33:54,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 503 treesize of output 584 [2021-11-21 00:33:54,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:54,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:54,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:55,321 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:33:55,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 584 treesize of output 600 [2021-11-21 00:33:55,425 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 00:33:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 633 treesize of output 604 [2021-11-21 00:33:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 601 treesize of output 588 [2021-11-21 00:33:56,108 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:33:56,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 582 treesize of output 672 [2021-11-21 00:33:56,196 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:33:56,196 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 673 treesize of output 621 [2021-11-21 00:34:09,641 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 [2021-11-21 00:34:09,655 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 [2021-11-21 00:34:09,760 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:34:09,760 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 133 treesize of output 120 [2021-11-21 00:34:09,800 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:34:09,801 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 166 treesize of output 132 [2021-11-21 00:34:09,866 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:34:09,867 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 120 treesize of output 86 [2021-11-21 00:34:09,907 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:34:09,907 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 73 treesize of output 54 [2021-11-21 00:34:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:10,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:10,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:34:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:10,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:10,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:34:12,783 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_back with input of size 25 for LOIs [2021-11-21 00:34:17,633 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 53 for LOIs [2021-11-21 00:34:18,231 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-21 00:34:18,412 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:34:25,881 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:34:25,941 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:34:26,080 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:34:26,811 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:35,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:35,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:34:35,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-11-21 00:34:35,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718292355] [2021-11-21 00:34:35,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:35,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 00:34:35,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 00:34:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=5096, Unknown=4, NotChecked=0, Total=5402 [2021-11-21 00:34:35,453 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 28 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 25 states have internal predecessors, (65), 13 states have call successors, (27), 6 states have call predecessors, (27), 8 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-21 00:34:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:38,464 INFO L93 Difference]: Finished difference Result 255 states and 347 transitions. [2021-11-21 00:34:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 00:34:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 25 states have internal predecessors, (65), 13 states have call successors, (27), 6 states have call predecessors, (27), 8 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) Word has length 64 [2021-11-21 00:34:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:38,467 INFO L225 Difference]: With dead ends: 255 [2021-11-21 00:34:38,467 INFO L226 Difference]: Without dead ends: 179 [2021-11-21 00:34:38,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 124 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=462, Invalid=8276, Unknown=4, NotChecked=0, Total=8742 [2021-11-21 00:34:38,470 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 95 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:38,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1932 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 833 Invalid, 0 Unknown, 487 Unchecked, 1.1s Time] [2021-11-21 00:34:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-21 00:34:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-11-21 00:34:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 46 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (48), 42 states have call predecessors, (48), 45 states have call successors, (48) [2021-11-21 00:34:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2021-11-21 00:34:38,502 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 64 [2021-11-21 00:34:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:38,503 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2021-11-21 00:34:38,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 25 states have internal predecessors, (65), 13 states have call successors, (27), 6 states have call predecessors, (27), 8 states have return successors, (24), 11 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-21 00:34:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2021-11-21 00:34:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:34:38,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:38,506 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:38,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:38,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:34:38,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash -627453403, now seen corresponding path program 2 times [2021-11-21 00:34:38,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:38,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486186062] [2021-11-21 00:34:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:38,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 00:34:40,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486186062] [2021-11-21 00:34:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486186062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913299939] [2021-11-21 00:34:40,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:34:40,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:40,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:40,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:40,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:34:41,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:34:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:34:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-21 00:34:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:41,089 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 6 treesize of output 5 [2021-11-21 00:34:41,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:34:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:34:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:41,655 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-21 00:34:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2021-11-21 00:34:41,686 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:34:41,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:34:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-21 00:34:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:41,907 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:34:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 130 [2021-11-21 00:34:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:41,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:41,935 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-21 00:34:41,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 132 [2021-11-21 00:34:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:34:53,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 00:35:00,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913299939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:35:00,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431213129] [2021-11-21 00:35:00,902 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 00:35:00,902 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:00,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:00,903 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:00,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:01,096 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:35:01,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:35:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:01,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:01,285 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:35:01,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:35:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:03,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:35:04,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:35:04,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,464 INFO L354 Elim1Store]: treesize reduction 122, result has 27.4 percent of original size [2021-11-21 00:35:04,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:35:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,603 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 00:35:04,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:35:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:35:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:35:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:35:05,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:05,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:05,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:05,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:06,390 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-21 00:35:06,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 732 treesize of output 741 [2021-11-21 00:35:06,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:06,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:06,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:06,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:06,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:07,167 INFO L354 Elim1Store]: treesize reduction 597, result has 18.8 percent of original size [2021-11-21 00:35:07,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 841 treesize of output 844 [2021-11-21 00:35:07,261 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-21 00:35:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 926 treesize of output 879 [2021-11-21 00:35:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:07,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:07,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 881 treesize of output 860 [2021-11-21 00:35:07,686 INFO L354 Elim1Store]: treesize reduction 230, result has 21.8 percent of original size [2021-11-21 00:35:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 862 treesize of output 897 [2021-11-21 00:35:07,907 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-21 00:35:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 887 treesize of output 899 [2021-11-21 00:35:08,014 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:35:08,015 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 900 treesize of output 848 [2021-11-21 00:35:15,103 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 [2021-11-21 00:35:15,120 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 [2021-11-21 00:35:15,211 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:35:15,212 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 133 treesize of output 120 [2021-11-21 00:35:15,260 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:35:15,260 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 166 treesize of output 132 [2021-11-21 00:35:15,305 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:35:15,305 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 119 treesize of output 100 [2021-11-21 00:35:15,346 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:35:15,346 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 128 treesize of output 76 [2021-11-21 00:35:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:15,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:15,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:15,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:35:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:15,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:35:18,447 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_back with input of size 25 for LOIs [2021-11-21 00:35:23,554 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 52 for LOIs [2021-11-21 00:35:24,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-21 00:35:24,494 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:35:32,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:35:32,341 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:35:32,500 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:35:33,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:43,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:35:43,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:35:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 7] total 37 [2021-11-21 00:35:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103423974] [2021-11-21 00:35:43,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:35:43,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 00:35:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 00:35:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4839, Unknown=0, NotChecked=0, Total=5112 [2021-11-21 00:35:43,162 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 37 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 15 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2021-11-21 00:35:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:55,210 INFO L93 Difference]: Finished difference Result 330 states and 482 transitions. [2021-11-21 00:35:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-21 00:35:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 15 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) Word has length 70 [2021-11-21 00:35:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:55,215 INFO L225 Difference]: With dead ends: 330 [2021-11-21 00:35:55,215 INFO L226 Difference]: Without dead ends: 268 [2021-11-21 00:35:55,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 149 SyntacticMatches, 20 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3354 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=565, Invalid=9737, Unknown=0, NotChecked=0, Total=10302 [2021-11-21 00:35:55,221 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 252 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:55,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1637 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2847 Invalid, 0 Unknown, 530 Unchecked, 5.3s Time] [2021-11-21 00:35:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-21 00:35:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 193. [2021-11-21 00:35:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 105 states have (on average 1.161904761904762) internal successors, (122), 109 states have internal predecessors, (122), 59 states have call successors, (59), 27 states have call predecessors, (59), 28 states have return successors, (64), 56 states have call predecessors, (64), 58 states have call successors, (64) [2021-11-21 00:35:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 245 transitions. [2021-11-21 00:35:55,281 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 245 transitions. Word has length 70 [2021-11-21 00:35:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:55,281 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 245 transitions. [2021-11-21 00:35:55,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 15 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2021-11-21 00:35:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 245 transitions. [2021-11-21 00:35:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 00:35:55,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:55,284 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:55,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:55,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:55,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1608324080, now seen corresponding path program 1 times [2021-11-21 00:35:55,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992771439] [2021-11-21 00:35:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:55,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 00:35:56,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:56,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992771439] [2021-11-21 00:35:56,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992771439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:56,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59034507] [2021-11-21 00:35:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:56,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:56,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:56,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:56,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b39f38f-2dd5-407a-ad24-b5c88314a370/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:35:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-21 00:35:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:56,990 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:35:56,990 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 63 treesize of output 50 [2021-11-21 00:35:57,026 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 00:35:57,027 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 71 treesize of output 54 [2021-11-21 00:36:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:36:48,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:31,317 INFO L354 Elim1Store]: treesize reduction 274, result has 44.1 percent of original size [2021-11-21 00:37:31,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 4775 treesize of output 4506 [2021-11-21 00:37:31,909 INFO L354 Elim1Store]: treesize reduction 351, result has 30.9 percent of original size [2021-11-21 00:37:31,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 24133 treesize of output 22455 [2021-11-21 00:37:33,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:37:33,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 18845 treesize of output 16819 [2021-11-21 00:37:33,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:37:33,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 16819 treesize of output 16807 [2021-11-21 00:37:47,162 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 6 treesize of output 4 [2021-11-21 00:37:54,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:54,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 94 [2021-11-21 00:37:57,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:37:57,055 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 21 treesize of output 25 [2021-11-21 00:37:57,766 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 6 treesize of output 4 [2021-11-21 00:37:58,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:58,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-21 00:38:07,606 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 10 treesize of output 4 [2021-11-21 00:38:08,521 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 10 treesize of output 4 [2021-11-21 00:38:10,449 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 10 treesize of output 4 [2021-11-21 00:38:10,636 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 10 treesize of output 4 [2021-11-21 00:38:16,990 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 10 treesize of output 4 [2021-11-21 00:38:24,138 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 21 treesize of output 17 [2021-11-21 00:38:24,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:38:24,205 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2021-11-21 00:38:24,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:38:24,477 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 47 [2021-11-21 00:38:24,639 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 28 treesize of output 22 [2021-11-21 00:38:25,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:38:25,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 253