./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:34:53,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:34:53,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:34:53,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:34:53,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:34:53,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:34:53,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:34:53,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:34:53,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:34:53,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:34:53,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:34:53,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:34:53,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:34:53,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:34:53,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:34:53,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:34:53,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:34:53,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:34:53,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:34:53,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:34:53,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:34:53,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:34:53,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:34:53,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:34:53,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:34:53,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:34:53,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:34:53,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:34:53,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:34:53,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:34:53,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:34:53,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:34:53,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:34:53,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:34:53,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:34:53,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:34:53,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:34:53,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:34:53,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:34:53,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:34:53,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:34:53,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:34:53,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:34:53,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:34:53,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:34:53,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:34:53,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:34:53,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:34:53,311 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:34:53,312 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:34:53,312 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:34:53,312 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:34:53,312 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:34:53,312 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:34:53,313 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:34:53,313 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:34:53,313 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:34:53,313 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:34:53,313 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:34:53,314 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:34:53,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:34:53,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:34:53,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:34:53,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:34:53,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:34:53,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:34:53,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:34:53,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:34:53,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:34:53,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:34:53,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:34:53,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:53,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:34:53,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:34:53,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:34:53,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:34:53,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:34:53,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:34:53,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:34:53,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:34:53,326 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_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-11-25 20:34:53,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:34:53,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:34:53,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:34:53,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:34:53,584 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:34:53,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-25 20:34:53,656 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/data/7f57a6140/b2691e5b5c51412fa4a43184ea2f14d6/FLAGcfe9d75c3 [2021-11-25 20:34:54,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:34:54,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-25 20:34:54,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/data/7f57a6140/b2691e5b5c51412fa4a43184ea2f14d6/FLAGcfe9d75c3 [2021-11-25 20:34:54,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/data/7f57a6140/b2691e5b5c51412fa4a43184ea2f14d6 [2021-11-25 20:34:54,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:34:54,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:34:54,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:54,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:34:54,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:34:54,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:54" (1/1) ... [2021-11-25 20:34:54,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47786a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:54, skipping insertion in model container [2021-11-25 20:34:54,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:54" (1/1) ... [2021-11-25 20:34:54,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:34:54,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:34:54,991 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_b961152f-4ed3-4215-a822-24437107a6bf/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-25 20:34:54,998 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_b961152f-4ed3-4215-a822-24437107a6bf/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-25 20:34:55,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,922 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,924 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,940 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,941 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,944 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,947 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:55,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:34:56,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:34:56,374 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:34:56,377 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:34:56,379 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:34:56,380 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:34:56,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:34:56,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:34:56,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:34:56,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:34:56,541 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:34:56,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:56,607 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:34:56,619 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_b961152f-4ed3-4215-a822-24437107a6bf/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-25 20:34:56,619 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_b961152f-4ed3-4215-a822-24437107a6bf/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-25 20:34:56,681 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,681 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,682 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,682 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,701 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,713 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:34:56,772 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:34:56,773 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:34:56,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:34:56,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:34:56,776 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:34:56,776 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:34:56,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:34:56,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:34:56,778 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:34:56,778 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:34:56,800 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:34:56,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:57,077 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:34:57,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57 WrapperNode [2021-11-25 20:34:57,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:57,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:57,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:34:57,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:34:57,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,252 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 150 [2021-11-25 20:34:57,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:57,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:34:57,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:34:57,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:34:57,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:34:57,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:34:57,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:34:57,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:34:57,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (1/1) ... [2021-11-25 20:34:57,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:57,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:57,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:34:57,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:34:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:34:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:34:57,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:34:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-25 20:34:57,486 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-25 20:34:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:34:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-25 20:34:57,487 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-25 20:34:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:34:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:34:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-11-25 20:34:57,487 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-11-25 20:34:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:34:57,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:34:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:34:57,487 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:34:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:34:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:34:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:34:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 20:34:57,488 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 20:34:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-25 20:34:57,488 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-25 20:34:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:34:57,740 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:34:57,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:34:58,124 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:34:58,225 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:34:58,225 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:34:58,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:58 BoogieIcfgContainer [2021-11-25 20:34:58,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:34:58,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:34:58,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:34:58,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:34:58,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:34:54" (1/3) ... [2021-11-25 20:34:58,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d38261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:58, skipping insertion in model container [2021-11-25 20:34:58,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:57" (2/3) ... [2021-11-25 20:34:58,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d38261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:58, skipping insertion in model container [2021-11-25 20:34:58,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:58" (3/3) ... [2021-11-25 20:34:58,237 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-11-25 20:34:58,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:34:58,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:34:58,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:34:58,306 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:34:58,306 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:34:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-25 20:34:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 20:34:58,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:58,335 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:34:58,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 520735072, now seen corresponding path program 1 times [2021-11-25 20:34:58,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102323110] [2021-11-25 20:34:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:58,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:34:59,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:59,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102323110] [2021-11-25 20:34:59,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102323110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18655698] [2021-11-25 20:34:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:59,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:59,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:59,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:34:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 20:34:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:34:59,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:34:59,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18655698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:59,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:34:59,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 10 [2021-11-25 20:34:59,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207158152] [2021-11-25 20:34:59,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:59,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:34:59,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:34:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:34:59,931 INFO L87 Difference]: Start difference. First operand has 73 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-25 20:35:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:00,180 INFO L93 Difference]: Finished difference Result 140 states and 205 transitions. [2021-11-25 20:35:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:35:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42 [2021-11-25 20:35:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:00,192 INFO L225 Difference]: With dead ends: 140 [2021-11-25 20:35:00,192 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 20:35:00,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:35:00,200 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 16 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:00,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 363 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:35:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 20:35:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-25 20:35:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-25 20:35:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2021-11-25 20:35:00,250 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 42 [2021-11-25 20:35:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:00,250 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2021-11-25 20:35:00,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 4.75) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-25 20:35:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2021-11-25 20:35:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:35:00,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:00,254 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:00,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:35:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 20:35:00,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1517449636, now seen corresponding path program 1 times [2021-11-25 20:35:00,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125269641] [2021-11-25 20:35:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:00,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:35:00,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125269641] [2021-11-25 20:35:00,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125269641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:00,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:00,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:35:00,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795728577] [2021-11-25 20:35:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:00,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:35:00,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:35:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:35:00,654 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:35:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:00,832 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2021-11-25 20:35:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:35:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 44 [2021-11-25 20:35:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:00,835 INFO L225 Difference]: With dead ends: 140 [2021-11-25 20:35:00,835 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 20:35:00,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:35:00,838 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 43 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:00,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 402 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:35:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 20:35:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-25 20:35:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-25 20:35:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2021-11-25 20:35:00,853 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 44 [2021-11-25 20:35:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:00,854 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2021-11-25 20:35:00,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:35:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2021-11-25 20:35:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 20:35:00,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:00,856 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:00,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:35:00,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash -301934184, now seen corresponding path program 1 times [2021-11-25 20:35:00,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:00,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452023782] [2021-11-25 20:35:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:00,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:35:01,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:01,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452023782] [2021-11-25 20:35:01,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452023782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:01,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:01,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:35:01,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639139073] [2021-11-25 20:35:01,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:01,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:35:01,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:35:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:35:01,017 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:35:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:01,219 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2021-11-25 20:35:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:35:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2021-11-25 20:35:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:01,222 INFO L225 Difference]: With dead ends: 149 [2021-11-25 20:35:01,222 INFO L226 Difference]: Without dead ends: 81 [2021-11-25 20:35:01,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:35:01,224 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 69 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:01,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 468 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:35:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-25 20:35:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-11-25 20:35:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-25 20:35:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-11-25 20:35:01,239 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 46 [2021-11-25 20:35:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:01,240 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-11-25 20:35:01,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:35:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-11-25 20:35:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 20:35:01,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:01,242 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:35:01,242 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash -271050449, now seen corresponding path program 1 times [2021-11-25 20:35:01,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:01,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370520401] [2021-11-25 20:35:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:01,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:35:01,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370520401] [2021-11-25 20:35:01,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370520401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:01,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:01,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:35:01,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411265844] [2021-11-25 20:35:01,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:01,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:35:01,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:35:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:35:01,351 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 20:35:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:01,461 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2021-11-25 20:35:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:35:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2021-11-25 20:35:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:01,464 INFO L225 Difference]: With dead ends: 145 [2021-11-25 20:35:01,464 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 20:35:01,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:35:01,466 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 35 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:01,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 218 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:35:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 20:35:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-25 20:35:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-25 20:35:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-11-25 20:35:01,483 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 47 [2021-11-25 20:35:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:01,483 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-11-25 20:35:01,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 20:35:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-11-25 20:35:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:35:01,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:01,486 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:01,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:35:01,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1195380273, now seen corresponding path program 1 times [2021-11-25 20:35:01,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93229064] [2021-11-25 20:35:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:01,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:35:01,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93229064] [2021-11-25 20:35:01,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93229064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:01,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883762420] [2021-11-25 20:35:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:01,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:01,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:01,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:35:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:35:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 20:35:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:35:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:35:02,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:35:02,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883762420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:02,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:35:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-11-25 20:35:02,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866954823] [2021-11-25 20:35:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:02,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:35:02,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:35:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:35:02,361 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 8 states, 5 states have (on average 5.0) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 20:35:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:02,562 INFO L93 Difference]: Finished difference Result 145 states and 196 transitions. [2021-11-25 20:35:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:35:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 5.0) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2021-11-25 20:35:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:02,569 INFO L225 Difference]: With dead ends: 145 [2021-11-25 20:35:02,569 INFO L226 Difference]: Without dead ends: 79 [2021-11-25 20:35:02,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:35:02,572 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 18 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:02,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 500 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:35:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-25 20:35:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-11-25 20:35:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-25 20:35:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-25 20:35:02,592 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 50 [2021-11-25 20:35:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:02,592 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-25 20:35:02,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 5.0) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 20:35:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-25 20:35:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:35:02,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:02,596 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:02,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 20:35:02,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:02,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash -286328061, now seen corresponding path program 1 times [2021-11-25 20:35:02,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:02,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104569352] [2021-11-25 20:35:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:02,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:35:03,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104569352] [2021-11-25 20:35:03,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104569352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915208471] [2021-11-25 20:35:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:03,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:03,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:03,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:35:03,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:35:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 20:35:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:35:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:35:03,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:35:03,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915208471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:03,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:35:03,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-25 20:35:03,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428678270] [2021-11-25 20:35:03,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:03,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:35:03,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:35:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:35:03,658 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 9 states, 6 states have (on average 4.5) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 20:35:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:03,968 INFO L93 Difference]: Finished difference Result 150 states and 202 transitions. [2021-11-25 20:35:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:35:03,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 4.5) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 52 [2021-11-25 20:35:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:03,971 INFO L225 Difference]: With dead ends: 150 [2021-11-25 20:35:03,973 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 20:35:03,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:35:03,976 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 22 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:03,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 505 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:35:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 20:35:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-11-25 20:35:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-25 20:35:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2021-11-25 20:35:03,995 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52 [2021-11-25 20:35:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:03,996 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2021-11-25 20:35:03,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 4.5) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 20:35:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2021-11-25 20:35:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:35:03,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:03,998 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:04,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:35:04,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:04,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 212739364, now seen corresponding path program 1 times [2021-11-25 20:35:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717253569] [2021-11-25 20:35:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:04,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:35:05,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717253569] [2021-11-25 20:35:05,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717253569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:05,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:35:05,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:35:05,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716444975] [2021-11-25 20:35:05,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:05,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:35:05,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:35:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:35:05,174 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 20:35:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:05,815 INFO L93 Difference]: Finished difference Result 124 states and 175 transitions. [2021-11-25 20:35:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:35:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 53 [2021-11-25 20:35:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:05,818 INFO L225 Difference]: With dead ends: 124 [2021-11-25 20:35:05,818 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 20:35:05,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:35:05,819 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 29 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:05,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 808 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:35:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 20:35:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2021-11-25 20:35:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 55 states have internal predecessors, (59), 42 states have call successors, (42), 9 states have call predecessors, (42), 10 states have return successors, (43), 40 states have call predecessors, (43), 41 states have call successors, (43) [2021-11-25 20:35:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2021-11-25 20:35:05,837 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 53 [2021-11-25 20:35:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:05,838 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2021-11-25 20:35:05,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 20:35:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2021-11-25 20:35:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:35:05,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:05,840 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-25 20:35:05,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:35:05,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -548953146, now seen corresponding path program 1 times [2021-11-25 20:35:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007926529] [2021-11-25 20:35:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:05,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:35:06,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:06,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007926529] [2021-11-25 20:35:06,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007926529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:06,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084937053] [2021-11-25 20:35:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:06,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:06,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:35:06,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:35:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:06,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 20:35:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:35:06,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 20:35:06,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:06,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:35:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:06,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-11-25 20:35:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:07,942 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-25 20:35:07,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-11-25 20:35:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:35:07,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:35:16,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:35:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2021-11-25 20:35:16,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:35:16,953 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 20:35:16,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:35:16,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 267 [2021-11-25 20:35:17,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:35:17,003 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 275 treesize of output 271 [2021-11-25 20:35:17,265 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 [2021-11-25 20:35:17,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:35:17,329 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 50 treesize of output 52 [2021-11-25 20:35:17,442 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 [2021-11-25 20:35:17,460 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 20:35:17,471 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 [2021-11-25 20:35:17,501 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 [2021-11-25 20:35:17,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:35:17,521 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 19 treesize of output 23 [2021-11-25 20:35:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:35:17,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084937053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:35:17,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978951432] [2021-11-25 20:35:17,737 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-25 20:35:17,737 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:35:17,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:35:17,747 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:35:17,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:35:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:17,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,013 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-25 20:35:18,014 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 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-25 20:35:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 24 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2021-11-25 20:35:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,615 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 [2021-11-25 20:35:18,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,664 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 [2021-11-25 20:35:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,703 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 [2021-11-25 20:35:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,732 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 [2021-11-25 20:35:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,820 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 [2021-11-25 20:35:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,957 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 20:35:18,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 93 [2021-11-25 20:35:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:19,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2021-11-25 20:35:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 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 [2021-11-25 20:35:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 31 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 62 [2021-11-25 20:35:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 [2021-11-25 20:35:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:19,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:19,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:19,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:19,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:19,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:20,234 INFO L354 Elim1Store]: treesize reduction 255, result has 23.2 percent of original size [2021-11-25 20:35:20,235 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 28 case distinctions, treesize of input 778 treesize of output 787 [2021-11-25 20:35:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:20,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:20,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:20,866 INFO L354 Elim1Store]: treesize reduction 261, result has 24.1 percent of original size [2021-11-25 20:35:20,867 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 28 case distinctions, treesize of input 792 treesize of output 801 [2021-11-25 20:35:21,254 INFO L354 Elim1Store]: treesize reduction 252, result has 15.2 percent of original size [2021-11-25 20:35:21,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 759 treesize of output 772 [2021-11-25 20:35:21,808 INFO L354 Elim1Store]: treesize reduction 332, result has 13.8 percent of original size [2021-11-25 20:35:21,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 762 treesize of output 782 [2021-11-25 20:35:21,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:21,914 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 20:35:21,915 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 1 case distinctions, treesize of input 794 treesize of output 747 [2021-11-25 20:35:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:21,967 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 768 treesize of output 747 [2021-11-25 20:35:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:22,069 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 71 treesize of output 19 [2021-11-25 20:35:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,058 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 29 treesize of output 17 [2021-11-25 20:35:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,084 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 59 treesize of output 13 [2021-11-25 20:35:26,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2021-11-25 20:35:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,119 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 53 treesize of output 23 [2021-11-25 20:35:26,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:35:26,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:35:26,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,183 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 [2021-11-25 20:35:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,198 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 [2021-11-25 20:35:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,222 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 [2021-11-25 20:35:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:26,249 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 [2021-11-25 20:35:27,385 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-25 20:35:28,569 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 78 for LOIs [2021-11-25 20:35:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,281 INFO L354 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2021-11-25 20:35:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2021-11-25 20:35:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,582 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 20:35:29,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2021-11-25 20:35:29,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,854 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-25 20:35:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2021-11-25 20:35:29,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:29,881 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 22 treesize of output 7 [2021-11-25 20:35:29,921 INFO L354 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2021-11-25 20:35:29,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2021-11-25 20:35:30,153 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-25 20:35:30,165 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-25 20:35:30,168 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 26 for LOIs [2021-11-25 20:35:30,276 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 130 for LOIs [2021-11-25 20:35:30,324 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-25 20:35:30,434 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:35:37,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3312#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 20:35:37,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:35:37,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:35:37,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2021-11-25 20:35:37,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449081238] [2021-11-25 20:35:37,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:35:37,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 20:35:37,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 20:35:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3436, Unknown=4, NotChecked=0, Total=3660 [2021-11-25 20:35:37,525 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 29 states, 26 states have (on average 2.269230769230769) internal successors, (59), 28 states have internal predecessors, (59), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 20:35:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:39,139 INFO L93 Difference]: Finished difference Result 264 states and 387 transitions. [2021-11-25 20:35:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:35:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.269230769230769) internal successors, (59), 28 states have internal predecessors, (59), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) Word has length 54 [2021-11-25 20:35:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:39,142 INFO L225 Difference]: With dead ends: 264 [2021-11-25 20:35:39,143 INFO L226 Difference]: Without dead ends: 183 [2021-11-25 20:35:39,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=349, Invalid=5049, Unknown=4, NotChecked=0, Total=5402 [2021-11-25 20:35:39,146 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 190 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:39,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1828 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 869 Invalid, 0 Unknown, 356 Unchecked, 1.0s Time] [2021-11-25 20:35:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-25 20:35:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 134. [2021-11-25 20:35:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.162162162162162) internal successors, (86), 79 states have internal predecessors, (86), 46 states have call successors, (46), 11 states have call predecessors, (46), 13 states have return successors, (50), 43 states have call predecessors, (50), 45 states have call successors, (50) [2021-11-25 20:35:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2021-11-25 20:35:39,171 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 54 [2021-11-25 20:35:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:39,171 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2021-11-25 20:35:39,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.269230769230769) internal successors, (59), 28 states have internal predecessors, (59), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 20:35:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2021-11-25 20:35:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:35:39,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:39,174 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:39,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:35:39,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:39,401 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 209078681, now seen corresponding path program 2 times [2021-11-25 20:35:39,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:39,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23070752] [2021-11-25 20:35:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:39,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:35:40,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23070752] [2021-11-25 20:35:40,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23070752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108647827] [2021-11-25 20:35:40,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:35:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:40,490 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:35:40,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:35:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:35:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:35:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 186 conjunts are in the unsatisfiable core [2021-11-25 20:35:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:35:41,966 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 8 [2021-11-25 20:35:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:42,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 20:35:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:42,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 20:35:42,303 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 8 treesize of output 7 [2021-11-25 20:35:42,309 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 8 treesize of output 7 [2021-11-25 20:35:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:43,853 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 0 case distinctions, treesize of input 198 treesize of output 166 [2021-11-25 20:35:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:43,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 58 [2021-11-25 20:35:43,916 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-25 20:35:43,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 126 [2021-11-25 20:35:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 73 [2021-11-25 20:35:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:43,942 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 62 treesize of output 46 [2021-11-25 20:35:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:43,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 27 [2021-11-25 20:35:43,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 20:35:43,977 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 16 treesize of output 15 [2021-11-25 20:35:43,996 INFO L354 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-11-25 20:35:43,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 62 [2021-11-25 20:35:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:35:44,987 INFO L354 Elim1Store]: treesize reduction 8, result has 77.8 percent of original size [2021-11-25 20:35:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 229 treesize of output 142 [2021-11-25 20:35:45,026 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-11-25 20:35:45,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 75 treesize of output 41 [2021-11-25 20:35:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:35:45,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:35:47,659 WARN L838 $PredicateComparison]: unable to prove that (and (or (not (= c_aws_linked_list_insert_before_~to_add.base 0)) (not (= c_aws_linked_list_insert_before_~to_add.offset 0))) (or (not (= c_aws_linked_list_insert_before_~before.offset 0)) (not (= c_aws_linked_list_insert_before_~before.base 0))) (forall ((v_ArrVal_3098 (Array Int Int)) (v_ArrVal_3101 (Array Int Int)) (v_ArrVal_3058 (Array Int Int)) (v_ArrVal_3081 (Array Int Int))) (= c_aws_linked_list_insert_before_~before.base (select (select (let ((.cse1 (+ c_aws_linked_list_insert_before_~before.offset 8))) (store (let ((.cse0 (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (let ((.cse2 (store (select |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.base))) (store .cse2 (+ c_aws_linked_list_insert_before_~to_add.offset 8) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base .cse2) c_aws_linked_list_insert_before_~before.base) .cse1)))))) (store .cse0 (select (select .cse0 c_aws_linked_list_insert_before_~before.base) .cse1) v_ArrVal_3058)) c_aws_linked_list_insert_before_~before.base (store (select (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3098) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3101) c_aws_linked_list_insert_before_~before.base) .cse1) v_ArrVal_3081) c_aws_linked_list_insert_before_~before.base) .cse1 c_aws_linked_list_insert_before_~to_add.base))) c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset))) (forall ((v_ArrVal_3108 (Array Int Int)) (v_ArrVal_3071 (Array Int Int)) (v_ArrVal_3093 (Array Int Int))) (= c_aws_linked_list_insert_before_~before.offset (select (select (let ((.cse5 (+ c_aws_linked_list_insert_before_~to_add.offset 8)) (.cse6 (+ c_aws_linked_list_insert_before_~before.offset 8))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse7 (store (select |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse7 .cse5 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse7) c_aws_linked_list_insert_before_~before.base) .cse6)))))) (store (store .cse3 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (let ((.cse4 (store (select |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.base))) (store .cse4 .cse5 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base .cse4) c_aws_linked_list_insert_before_~before.base) .cse6)))) c_aws_linked_list_insert_before_~before.base) .cse6) v_ArrVal_3093) c_aws_linked_list_insert_before_~before.base (store (select (store .cse3 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3071) c_aws_linked_list_insert_before_~before.base) .cse6) v_ArrVal_3108) c_aws_linked_list_insert_before_~before.base) .cse6 c_aws_linked_list_insert_before_~to_add.offset)))) c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset)))) is different from false [2021-11-25 20:35:47,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108647827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:47,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33917485] [2021-11-25 20:35:47,701 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2021-11-25 20:35:47,701 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:35:47,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:35:47,702 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:35:47,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:35:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:47,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:47,839 INFO L354 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2021-11-25 20:35:47,839 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 5 case distinctions, treesize of input 35 treesize of output 83 [2021-11-25 20:35:47,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:47,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,012 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-25 20:35:48,013 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 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-25 20:35:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,165 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 [2021-11-25 20:35:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,179 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 [2021-11-25 20:35:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,191 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 [2021-11-25 20:35:48,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,211 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 [2021-11-25 20:35:48,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:35:48,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,262 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 [2021-11-25 20:35:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:35:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,298 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 [2021-11-25 20:35:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:48,340 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:35:48,340 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 [2021-11-25 20:35:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:48,386 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:35:48,386 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 45 [2021-11-25 20:35:48,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:35:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:35:48,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,463 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 29 treesize of output 17 [2021-11-25 20:35:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,484 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 41 treesize of output 23 [2021-11-25 20:35:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,509 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 71 treesize of output 19 [2021-11-25 20:35:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,530 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 71 treesize of output 19 [2021-11-25 20:35:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,581 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 [2021-11-25 20:35:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,608 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 [2021-11-25 20:35:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,632 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 [2021-11-25 20:35:48,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:48,655 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 [2021-11-25 20:35:49,605 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-25 20:35:50,704 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 77 for LOIs [2021-11-25 20:35:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,350 INFO L354 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2021-11-25 20:35:51,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2021-11-25 20:35:51,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,542 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 20:35:51,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2021-11-25 20:35:51,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,753 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-25 20:35:51,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2021-11-25 20:35:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:51,898 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-25 20:35:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2021-11-25 20:35:52,151 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-25 20:35:52,163 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-25 20:35:52,169 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 26 for LOIs [2021-11-25 20:35:52,288 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 20 for LOIs [2021-11-25 20:35:52,292 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-25 20:35:52,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:35:57,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4213#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 20:35:57,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:35:57,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:35:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-11-25 20:35:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590357546] [2021-11-25 20:35:57,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:35:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:35:57,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:35:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3339, Unknown=1, NotChecked=116, Total=3660 [2021-11-25 20:35:57,873 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand has 24 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 11 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-25 20:35:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:59,695 INFO L93 Difference]: Finished difference Result 228 states and 292 transitions. [2021-11-25 20:35:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 20:35:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 11 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 61 [2021-11-25 20:35:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:59,698 INFO L225 Difference]: With dead ends: 228 [2021-11-25 20:35:59,698 INFO L226 Difference]: Without dead ends: 217 [2021-11-25 20:35:59,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 73 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=310, Invalid=5393, Unknown=1, NotChecked=148, Total=5852 [2021-11-25 20:35:59,702 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 109 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:59,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1818 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 949 Invalid, 0 Unknown, 318 Unchecked, 1.2s Time] [2021-11-25 20:35:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-25 20:35:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-11-25 20:35:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 116 states have internal predecessors, (129), 59 states have call successors, (59), 22 states have call predecessors, (59), 23 states have return successors, (59), 56 states have call predecessors, (59), 57 states have call successors, (59) [2021-11-25 20:35:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 247 transitions. [2021-11-25 20:35:59,728 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 247 transitions. Word has length 61 [2021-11-25 20:35:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:59,729 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 247 transitions. [2021-11-25 20:35:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 11 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-25 20:35:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 247 transitions. [2021-11-25 20:35:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 20:35:59,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:59,731 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:35:59,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:35:59,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:35:59,945 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1333378944, now seen corresponding path program 1 times [2021-11-25 20:35:59,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:59,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017511197] [2021-11-25 20:35:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:59,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:36:00,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017511197] [2021-11-25 20:36:00,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017511197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:00,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850044852] [2021-11-25 20:36:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:00,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:00,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:00,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:36:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:01,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-25 20:36:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:01,395 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 8 [2021-11-25 20:36:01,595 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 9 treesize of output 8 [2021-11-25 20:36:01,598 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 8 treesize of output 7 [2021-11-25 20:36:01,613 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:36:01,616 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 6 treesize of output 5 [2021-11-25 20:36:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:03,314 INFO L354 Elim1Store]: treesize reduction 43, result has 6.5 percent of original size [2021-11-25 20:36:03,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 416 treesize of output 361 [2021-11-25 20:36:03,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:03,336 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 20:36:03,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 135 [2021-11-25 20:36:03,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 111 [2021-11-25 20:36:03,387 INFO L354 Elim1Store]: treesize reduction 118, result has 11.9 percent of original size [2021-11-25 20:36:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 125 [2021-11-25 20:36:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 94 [2021-11-25 20:36:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:03,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 17 [2021-11-25 20:36:03,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 27 [2021-11-25 20:36:03,425 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 9 treesize of output 7 [2021-11-25 20:36:03,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 33 [2021-11-25 20:36:03,460 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 21 treesize of output 11 [2021-11-25 20:36:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:36:04,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:36:07,407 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3549 Int) (v_ArrVal_3571 Int) (v_ArrVal_3594 Int) (v_ArrVal_3580 (Array Int Int)) (v_ArrVal_3593 (Array Int Int)) (v_ArrVal_3573 (Array Int Int)) (v_ArrVal_3541 (Array Int Int)) (v_ArrVal_3565 (Array Int Int)) (v_ArrVal_3554 (Array Int Int)) (v_ArrVal_3555 (Array Int Int)) (v_ArrVal_3578 (Array Int Int)) (v_ArrVal_3558 (Array Int Int)) (v_ArrVal_3537 (Array Int Int))) (= c_aws_linked_list_insert_before_~to_add.offset (let ((.cse1 (+ c_aws_linked_list_insert_before_~to_add.offset 8)) (.cse2 (+ c_aws_linked_list_insert_before_~before.offset 8))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse6 (store (select |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse6 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse6) c_aws_linked_list_insert_before_~before.base) .cse2)))))) (let ((.cse4 (select (select .cse5 c_aws_linked_list_insert_before_~before.base) .cse2))) (let ((.cse0 (store (store .cse5 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3554) c_aws_linked_list_insert_before_~before.base) .cse2) (store (select .cse5 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3537) c_aws_linked_list_insert_before_~before.base) .cse2)) .cse4 c_aws_linked_list_insert_before_~to_add.offset)) c_aws_linked_list_insert_before_~before.base (store (select (store .cse5 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3573) c_aws_linked_list_insert_before_~before.base) .cse2) (store (select .cse5 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3558) c_aws_linked_list_insert_before_~before.base) .cse2)) .cse4 c_aws_linked_list_insert_before_~to_add.offset)) c_aws_linked_list_insert_before_~before.base) .cse2 v_ArrVal_3594)))) (select (select .cse0 (select (select (store (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (store (store (select |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset v_ArrVal_3549) .cse1 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3578) c_aws_linked_list_insert_before_~before.base) .cse2))) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3555) c_aws_linked_list_insert_before_~before.base) .cse2) v_ArrVal_3541) c_aws_linked_list_insert_before_~before.base (store (select (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3593) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3565) c_aws_linked_list_insert_before_~before.base) .cse2) (store (let ((.cse3 (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3580))) (select .cse3 (select (select .cse3 c_aws_linked_list_insert_before_~before.base) .cse2))) .cse4 c_aws_linked_list_insert_before_~to_add.base)) c_aws_linked_list_insert_before_~before.base) .cse2 v_ArrVal_3571)) c_aws_linked_list_insert_before_~to_add.base) .cse1)) (select (select .cse0 c_aws_linked_list_insert_before_~to_add.base) .cse1)))))))) (or (not (= c_aws_linked_list_insert_before_~to_add.base 0)) (not (= c_aws_linked_list_insert_before_~to_add.offset 0))) (forall ((v_ArrVal_3549 Int) (v_ArrVal_3571 Int) (v_ArrVal_3594 Int) (v_ArrVal_3580 (Array Int Int)) (v_ArrVal_3593 (Array Int Int)) (v_ArrVal_3573 (Array Int Int)) (v_ArrVal_3541 (Array Int Int)) (v_ArrVal_3565 (Array Int Int)) (v_ArrVal_3554 (Array Int Int)) (v_ArrVal_3555 (Array Int Int)) (v_ArrVal_3578 (Array Int Int)) (v_ArrVal_3558 (Array Int Int)) (v_ArrVal_3537 (Array Int Int))) (= c_aws_linked_list_insert_before_~to_add.base (let ((.cse8 (+ c_aws_linked_list_insert_before_~to_add.offset 8)) (.cse9 (+ c_aws_linked_list_insert_before_~before.offset 8))) (let ((.cse12 (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse13 (store (select |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse13 .cse8 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse13) c_aws_linked_list_insert_before_~before.base) .cse9)))))) (let ((.cse11 (select (select .cse12 c_aws_linked_list_insert_before_~before.base) .cse9))) (select (let ((.cse7 (store (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (store (store (select |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset v_ArrVal_3549) .cse8 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3578) c_aws_linked_list_insert_before_~before.base) .cse9))) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3555) c_aws_linked_list_insert_before_~before.base) .cse9) v_ArrVal_3541) c_aws_linked_list_insert_before_~before.base (store (select (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3593) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3565) c_aws_linked_list_insert_before_~before.base) .cse9) (store (let ((.cse10 (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3580))) (select .cse10 (select (select .cse10 c_aws_linked_list_insert_before_~before.base) .cse9))) .cse11 c_aws_linked_list_insert_before_~to_add.base)) c_aws_linked_list_insert_before_~before.base) .cse9 v_ArrVal_3571)))) (select .cse7 (select (select .cse7 c_aws_linked_list_insert_before_~to_add.base) .cse8))) (select (select (store (store .cse12 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3554) c_aws_linked_list_insert_before_~before.base) .cse9) (store (select .cse12 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3537) c_aws_linked_list_insert_before_~before.base) .cse9)) .cse11 c_aws_linked_list_insert_before_~to_add.offset)) c_aws_linked_list_insert_before_~before.base (store (select (store .cse12 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3573) c_aws_linked_list_insert_before_~before.base) .cse9) (store (select .cse12 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3558) c_aws_linked_list_insert_before_~before.base) .cse9)) .cse11 c_aws_linked_list_insert_before_~to_add.offset)) c_aws_linked_list_insert_before_~before.base) .cse9 v_ArrVal_3594)) c_aws_linked_list_insert_before_~to_add.base) .cse8))))))) (or (forall ((v_ArrVal_3580 (Array Int Int)) (v_ArrVal_3593 (Array Int Int)) (v_ArrVal_3549 Int) (v_ArrVal_3541 (Array Int Int)) (v_ArrVal_3565 (Array Int Int)) (v_ArrVal_3555 (Array Int Int)) (v_ArrVal_3578 (Array Int Int)) (v_ArrVal_3571 Int)) (not (= (let ((.cse14 (+ c_aws_linked_list_insert_before_~to_add.offset 8))) (select (select (let ((.cse15 (+ c_aws_linked_list_insert_before_~before.offset 8))) (store (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base (store (store (select |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset v_ArrVal_3549) .cse14 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3578) c_aws_linked_list_insert_before_~before.base) .cse15))) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3555) c_aws_linked_list_insert_before_~before.base) .cse15) v_ArrVal_3541) c_aws_linked_list_insert_before_~before.base (store (select (store (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3593) (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3565) c_aws_linked_list_insert_before_~before.base) .cse15) (store (let ((.cse16 (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3580))) (select .cse16 (select (select .cse16 c_aws_linked_list_insert_before_~before.base) .cse15))) (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse17 (store (select |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse17 .cse14 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse17) c_aws_linked_list_insert_before_~before.base) .cse15)))) c_aws_linked_list_insert_before_~before.base) .cse15) c_aws_linked_list_insert_before_~to_add.base)) c_aws_linked_list_insert_before_~before.base) .cse15 v_ArrVal_3571))) c_aws_linked_list_insert_before_~to_add.base) .cse14)) 0))) (forall ((v_ArrVal_3573 (Array Int Int)) (v_ArrVal_3554 (Array Int Int)) (v_ArrVal_3558 (Array Int Int)) (v_ArrVal_3537 (Array Int Int)) (v_ArrVal_3594 Int)) (not (= (let ((.cse22 (+ c_aws_linked_list_insert_before_~to_add.offset 8))) (select (select (let ((.cse19 (+ c_aws_linked_list_insert_before_~before.offset 8))) (let ((.cse18 (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base (let ((.cse21 (store (select |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base) c_aws_linked_list_insert_before_~to_add.offset c_aws_linked_list_insert_before_~before.offset))) (store .cse21 .cse22 (select (select (store |c_#memory_$Pointer$.offset| c_aws_linked_list_insert_before_~to_add.base .cse21) c_aws_linked_list_insert_before_~before.base) .cse19)))))) (let ((.cse20 (select (select .cse18 c_aws_linked_list_insert_before_~before.base) .cse19))) (store (store .cse18 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3554) c_aws_linked_list_insert_before_~before.base) .cse19) (store (select .cse18 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3537) c_aws_linked_list_insert_before_~before.base) .cse19)) .cse20 c_aws_linked_list_insert_before_~to_add.offset)) c_aws_linked_list_insert_before_~before.base (store (select (store .cse18 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3573) c_aws_linked_list_insert_before_~before.base) .cse19) (store (select .cse18 (select (select (store |c_#memory_$Pointer$.base| c_aws_linked_list_insert_before_~to_add.base v_ArrVal_3558) c_aws_linked_list_insert_before_~before.base) .cse19)) .cse20 c_aws_linked_list_insert_before_~to_add.offset)) c_aws_linked_list_insert_before_~before.base) .cse19 v_ArrVal_3594))))) c_aws_linked_list_insert_before_~to_add.base) .cse22)) 0))))) is different from false [2021-11-25 20:36:07,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850044852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807862493] [2021-11-25 20:36:07,524 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2021-11-25 20:36:07,524 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:36:07,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:36:07,525 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:36:07,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:36:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:07,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:07,667 INFO L354 Elim1Store]: treesize reduction 102, result has 36.3 percent of original size [2021-11-25 20:36:07,668 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 5 case distinctions, treesize of input 35 treesize of output 83 [2021-11-25 20:36:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:07,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:07,845 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-25 20:36:07,845 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 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-25 20:36:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,001 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 [2021-11-25 20:36:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,017 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 [2021-11-25 20:36:08,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,027 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 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-25 20:36:08,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,043 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 [2021-11-25 20:36:08,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,117 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 [2021-11-25 20:36:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,151 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 48 treesize of output 41 [2021-11-25 20:36:08,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,201 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 52 treesize of output 43 [2021-11-25 20:36:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:08,228 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 [2021-11-25 20:36:09,249 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 60 for LOIs [2021-11-25 20:36:10,306 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_insert_before with input of size 89 for LOIs [2021-11-25 20:36:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:10,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,047 INFO L354 Elim1Store]: treesize reduction 272, result has 26.5 percent of original size [2021-11-25 20:36:11,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 621 treesize of output 475 [2021-11-25 20:36:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,212 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 20:36:11,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 172 [2021-11-25 20:36:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,240 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 22 treesize of output 7 [2021-11-25 20:36:11,309 INFO L354 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2021-11-25 20:36:11,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2021-11-25 20:36:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:11,394 INFO L354 Elim1Store]: treesize reduction 84, result has 47.5 percent of original size [2021-11-25 20:36:11,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 76 [2021-11-25 20:36:11,705 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-25 20:36:11,719 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-25 20:36:11,722 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 67 for LOIs [2021-11-25 20:36:11,852 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 20 for LOIs [2021-11-25 20:36:11,855 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-25 20:36:11,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:36:19,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5189#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 20:36:19,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:36:19,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:36:19,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-11-25 20:36:19,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323720873] [2021-11-25 20:36:19,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:19,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 20:36:19,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 20:36:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=5579, Unknown=1, NotChecked=150, Total=6006 [2021-11-25 20:36:19,917 INFO L87 Difference]: Start difference. First operand 195 states and 247 transitions. Second operand has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (27), 6 states have call predecessors, (27), 8 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-25 20:36:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:21,608 INFO L93 Difference]: Finished difference Result 264 states and 330 transitions. [2021-11-25 20:36:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 20:36:21,608 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (27), 6 states have call predecessors, (27), 8 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 62 [2021-11-25 20:36:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:21,610 INFO L225 Difference]: With dead ends: 264 [2021-11-25 20:36:21,611 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 20:36:21,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=344, Invalid=7491, Unknown=1, NotChecked=174, Total=8010 [2021-11-25 20:36:21,614 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 44 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:21,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2582 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1069 Invalid, 0 Unknown, 318 Unchecked, 1.1s Time] [2021-11-25 20:36:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 20:36:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 216. [2021-11-25 20:36:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 130 states have internal predecessors, (146), 60 states have call successors, (60), 28 states have call predecessors, (60), 28 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-25 20:36:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 264 transitions. [2021-11-25 20:36:21,645 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 264 transitions. Word has length 62 [2021-11-25 20:36:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:21,645 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 264 transitions. [2021-11-25 20:36:21,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (27), 6 states have call predecessors, (27), 8 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-25 20:36:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 264 transitions. [2021-11-25 20:36:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:36:21,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:21,648 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:21,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 20:36:21,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:21,861 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1009036023, now seen corresponding path program 1 times [2021-11-25 20:36:21,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:21,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956807552] [2021-11-25 20:36:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:21,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:36:23,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956807552] [2021-11-25 20:36:23,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956807552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074108003] [2021-11-25 20:36:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:23,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:23,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:23,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:23,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b961152f-4ed3-4215-a822-24437107a6bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:36:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:23,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 174 conjunts are in the unsatisfiable core [2021-11-25 20:36:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:23,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:36:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 20:36:23,770 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 8 treesize of output 7 [2021-11-25 20:36:26,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,120 INFO L354 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2021-11-25 20:36:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 276 treesize of output 248 [2021-11-25 20:36:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 100 [2021-11-25 20:36:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 101 [2021-11-25 20:36:26,160 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 63 [2021-11-25 20:36:26,193 INFO L354 Elim1Store]: treesize reduction 82, result has 20.4 percent of original size [2021-11-25 20:36:26,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 112 treesize of output 108 [2021-11-25 20:36:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:26,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 [2021-11-25 20:36:26,221 INFO L354 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2021-11-25 20:36:26,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 109 [2021-11-25 20:36:26,227 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 86 treesize of output 68 [2021-11-25 20:36:26,234 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 16 treesize of output 15 [2021-11-25 20:36:26,239 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 57 treesize of output 49 [2021-11-25 20:36:26,324 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 20:36:26,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 89 [2021-11-25 20:36:26,330 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 11 treesize of output 3 [2021-11-25 20:36:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:36:27,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:36:30,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:30,409 INFO L354 Elim1Store]: treesize reduction 123, result has 42.3 percent of original size [2021-11-25 20:36:30,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 3494 treesize of output 2927 [2021-11-25 20:36:30,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:36:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10519 treesize of output 10143 [2021-11-25 20:36:30,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:36:30,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14693 treesize of output 14599 [2021-11-25 20:36:30,625 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 14510 treesize of output 14318 [2021-11-25 20:36:31,237 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 12 treesize of output 8 [2021-11-25 20:36:31,436 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 12 treesize of output 8