./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:36:39,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:36:39,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:36:39,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:36:39,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:36:39,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:36:39,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:36:39,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:36:39,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:36:39,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:36:39,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:36:39,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:36:39,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:36:39,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:36:39,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:36:39,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:36:39,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:36:39,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:36:39,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:36:39,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:36:39,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:36:39,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:36:39,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:36:39,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:36:39,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:36:39,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:36:39,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:36:39,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:36:39,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:36:39,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:36:39,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:36:39,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:36:39,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:36:39,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:36:39,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:36:39,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:36:39,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:36:39,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:36:39,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:36:39,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:36:39,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:36:39,297 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:36:39,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:36:39,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:36:39,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:36:39,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:36:39,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:36:39,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:36:39,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:36:39,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:36:39,359 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:36:39,359 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:36:39,360 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:36:39,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:36:39,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:36:39,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:36:39,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:36:39,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:36:39,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:36:39,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:36:39,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:36:39,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:36:39,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:36:39,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:36:39,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:36:39,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:36:39,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:36:39,365 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:36:39,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:36:39,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:36:39,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:36:39,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:36:39,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:36:39,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:36:39,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:36:39,372 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:36:39,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:36:39,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:36:39,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:36:39,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:36:39,373 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_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2021-11-21 01:36:39,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:36:39,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:36:39,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:36:39,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:36:39,690 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:36:39,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-21 01:36:39,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/data/5d519f8a4/43b12346452f402698666f001bac75e8/FLAG0c1a1193f [2021-11-21 01:36:40,623 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:36:40,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-21 01:36:40,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/data/5d519f8a4/43b12346452f402698666f001bac75e8/FLAG0c1a1193f [2021-11-21 01:36:41,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/data/5d519f8a4/43b12346452f402698666f001bac75e8 [2021-11-21 01:36:41,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:36:41,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:36:41,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:36:41,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:36:41,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:36:41,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:36:41" (1/1) ... [2021-11-21 01:36:41,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe4a784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:41, skipping insertion in model container [2021-11-21 01:36:41,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:36:41" (1/1) ... [2021-11-21 01:36:41,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:36:41,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:36:41,617 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_b91e11df-32fb-462e-9346-af3c39e432fa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-21 01:36:41,631 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_b91e11df-32fb-462e-9346-af3c39e432fa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-21 01:36:42,561 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,571 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,599 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,600 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,602 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,603 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,604 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,604 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:42,913 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:36:42,914 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:36:42,915 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:36:42,916 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:36:42,918 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:36:42,918 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:36:42,919 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:36:42,920 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:36:42,920 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:36:42,921 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:36:43,053 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:36:43,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:36:43,091 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:36:43,119 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_b91e11df-32fb-462e-9346-af3c39e432fa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-21 01:36:43,120 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_b91e11df-32fb-462e-9346-af3c39e432fa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-21 01:36:43,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,248 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,249 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,250 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,250 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,252 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,252 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,253 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:36:43,316 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:36:43,319 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:36:43,321 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:36:43,322 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:36:43,329 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:36:43,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:36:43,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:36:43,331 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:36:43,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:36:43,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:36:43,362 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:36:43,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:36:43,632 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:36:43,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43 WrapperNode [2021-11-21 01:36:43,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:36:43,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:36:43,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:36:43,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:36:43,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,770 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2021-11-21 01:36:43,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:36:43,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:36:43,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:36:43,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:36:43,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:36:43,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:36:43,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:36:43,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:36:43,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (1/1) ... [2021-11-21 01:36:43,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:36:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:43,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:36:43,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:36:43,905 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-11-21 01:36:43,905 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-11-21 01:36:43,905 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-21 01:36:43,905 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-21 01:36:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:36:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:36:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:36:43,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:36:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:36:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:36:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:36:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:36:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:36:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:36:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:36:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:36:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:36:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:36:44,107 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:36:44,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:36:44,306 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:36:44,348 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:36:44,350 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:36:44,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:36:44 BoogieIcfgContainer [2021-11-21 01:36:44,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:36:44,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:36:44,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:36:44,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:36:44,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:36:41" (1/3) ... [2021-11-21 01:36:44,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c74a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:36:44, skipping insertion in model container [2021-11-21 01:36:44,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:36:43" (2/3) ... [2021-11-21 01:36:44,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c74a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:36:44, skipping insertion in model container [2021-11-21 01:36:44,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:36:44" (3/3) ... [2021-11-21 01:36:44,363 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2021-11-21 01:36:44,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:36:44,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:36:44,429 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:36:44,439 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:36:44,442 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:36:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:36:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:36:44,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:44,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:44,465 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 325938203, now seen corresponding path program 1 times [2021-11-21 01:36:44,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:44,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701540408] [2021-11-21 01:36:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:44,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:44,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701540408] [2021-11-21 01:36:44,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701540408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:44,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:44,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:36:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325558178] [2021-11-21 01:36:44,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:44,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:36:44,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:36:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:36:44,820 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:36:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:44,862 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-11-21 01:36:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:36:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-21 01:36:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:44,872 INFO L225 Difference]: With dead ends: 56 [2021-11-21 01:36:44,873 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:36:44,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:36:44,883 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:44,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:36:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:36:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 01:36:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:36:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-21 01:36:44,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2021-11-21 01:36:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-21 01:36:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:36:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-21 01:36:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:36:44,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:44,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:44,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:36:44,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -805366998, now seen corresponding path program 1 times [2021-11-21 01:36:44,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731554859] [2021-11-21 01:36:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:44,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:45,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:45,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731554859] [2021-11-21 01:36:45,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731554859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:45,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:45,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:36:45,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377060949] [2021-11-21 01:36:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:45,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:36:45,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:36:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:36:45,152 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:36:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:45,210 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-21 01:36:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:36:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-21 01:36:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:45,213 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:36:45,213 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:36:45,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:36:45,215 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:45,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:36:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:36:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-21 01:36:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:36:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-21 01:36:45,225 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-11-21 01:36:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:45,226 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-21 01:36:45,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:36:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-21 01:36:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:36:45,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:45,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:45,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:36:45,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 989415369, now seen corresponding path program 1 times [2021-11-21 01:36:45,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:45,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63912395] [2021-11-21 01:36:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:45,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:45,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63912395] [2021-11-21 01:36:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63912395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:45,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:45,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:36:45,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829536556] [2021-11-21 01:36:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:45,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:36:45,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:45,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:36:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:36:45,404 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:36:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:45,464 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-21 01:36:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:36:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-11-21 01:36:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:45,468 INFO L225 Difference]: With dead ends: 64 [2021-11-21 01:36:45,468 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:36:45,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:45,475 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:45,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:36:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:36:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-21 01:36:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:36:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-21 01:36:45,486 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2021-11-21 01:36:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:45,487 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-21 01:36:45,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:36:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-21 01:36:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:36:45,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:45,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:45,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:36:45,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash -518460441, now seen corresponding path program 1 times [2021-11-21 01:36:45,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016081819] [2021-11-21 01:36:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:45,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016081819] [2021-11-21 01:36:45,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016081819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:36:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364527793] [2021-11-21 01:36:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:45,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:45,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:45,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:45,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:36:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:36:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:46,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:46,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:46,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-21 01:36:46,768 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 26 treesize of output 24 [2021-11-21 01:36:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:46,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364527793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:46,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766797939] [2021-11-21 01:36:46,842 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:36:46,843 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:46,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:46,852 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:46,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:36:46,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:46,984 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:36:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 01:36:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:47,153 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:36:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:36:47,508 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:36:48,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:48,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:48,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:49,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:36:49,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:49,055 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 01:36:49,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 01:36:49,079 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:36:49,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 01:36:49,109 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:36:49,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 01:36:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:49,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:49,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:36:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:50,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:36:51,642 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2021-11-21 01:36:51,884 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:36:52,043 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:36:52,563 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 116 for LOIs [2021-11-21 01:36:57,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:57,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:36:57,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:36:57,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:00,004 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:00,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:37:00,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2021-11-21 01:37:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944216210] [2021-11-21 01:37:00,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:00,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:37:00,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:37:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:37:00,008 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:37:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:00,239 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-11-21 01:37:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:37:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 23 [2021-11-21 01:37:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:00,241 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:37:00,241 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 01:37:00,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:37:00,244 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:00,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 223 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-21 01:37:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 01:37:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-21 01:37:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:37:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-21 01:37:00,253 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 23 [2021-11-21 01:37:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:00,254 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-21 01:37:00,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:37:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-21 01:37:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:37:00,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:00,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:00,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:37:00,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:00,470 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:00,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1249058711, now seen corresponding path program 1 times [2021-11-21 01:37:00,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:00,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815483084] [2021-11-21 01:37:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:00,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:37:00,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:00,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815483084] [2021-11-21 01:37:00,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815483084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:37:00,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171849713] [2021-11-21 01:37:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:00,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:00,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:00,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:00,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:37:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:00,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:37:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:00,797 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:00,825 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:37:00,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:37:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:01,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 01:37:01,825 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 80 treesize of output 76 [2021-11-21 01:37:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:01,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171849713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989830698] [2021-11-21 01:37:01,886 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:37:01,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:37:01,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:37:01,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:37:01,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:01,983 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:37:01,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 01:37:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:02,127 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:37:02,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:37:02,406 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:37:03,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:03,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:03,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:03,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:03,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:03,839 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 01:37:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 01:37:03,862 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:37:03,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 01:37:03,879 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:37:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 01:37:03,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:03,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:03,943 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:03,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:05,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:06,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:07,291 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:37:07,350 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:37:07,512 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:37:09,278 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 116 for LOIs [2021-11-21 01:37:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:14,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:14,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:14,412 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:16,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:16,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:37:16,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 22 [2021-11-21 01:37:16,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476949750] [2021-11-21 01:37:16,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:16,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:37:16,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:37:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:37:16,699 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:37:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:17,027 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2021-11-21 01:37:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:37:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 26 [2021-11-21 01:37:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:17,032 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:37:17,032 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 01:37:17,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:37:17,034 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:17,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 313 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2021-11-21 01:37:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 01:37:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-11-21 01:37:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:37:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-21 01:37:17,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2021-11-21 01:37:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-21 01:37:17,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:37:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-21 01:37:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:37:17,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:17,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:17,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:37:17,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:17,270 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash -842842685, now seen corresponding path program 2 times [2021-11-21 01:37:17,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:17,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637394274] [2021-11-21 01:37:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:17,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:37:17,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:17,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637394274] [2021-11-21 01:37:17,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637394274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:37:17,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424459131] [2021-11-21 01:37:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:37:17,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:17,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:17,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:17,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:37:17,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:37:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:17,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 01:37:17,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:17,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:17,801 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-21 01:37:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-21 01:37:17,839 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-21 01:37:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 29 [2021-11-21 01:37:19,911 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_27 Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_27 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_27))) (let ((.cse1 (select .cse0 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_27))) (and (= (select .cse0 (+ 2 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_27)) .cse1) (= .cse1 (select .cse0 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_27 1))))))) is different from true [2021-11-21 01:37:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:32,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:33,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-11-21 01:37:33,973 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:37:33,977 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 325 treesize of output 319 [2021-11-21 01:37:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:34,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424459131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406331835] [2021-11-21 01:37:34,267 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:37:34,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:37:34,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:37:34,271 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:37:34,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:34,381 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:37:34,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:37:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 01:37:34,714 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:37:35,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:35,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:35,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:35,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:35,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:35,882 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:37:35,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 01:37:35,904 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:37:35,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 01:37:35,923 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 01:37:35,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 01:37:35,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:35,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:35,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:35,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:37,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:38,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:38,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:38,925 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:37:38,972 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:37:39,099 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:37:40,596 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 116 for LOIs [2021-11-21 01:37:45,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:45,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:45,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:45,747 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:48,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:48,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:37:48,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 13] total 28 [2021-11-21 01:37:48,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485414685] [2021-11-21 01:37:48,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:48,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:37:48,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:37:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1774, Unknown=1, NotChecked=84, Total=1980 [2021-11-21 01:37:48,271 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:37:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:49,298 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2021-11-21 01:37:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:37:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2021-11-21 01:37:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:49,299 INFO L225 Difference]: With dead ends: 108 [2021-11-21 01:37:49,300 INFO L226 Difference]: Without dead ends: 70 [2021-11-21 01:37:49,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=156, Invalid=2199, Unknown=1, NotChecked=94, Total=2450 [2021-11-21 01:37:49,302 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:49,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 470 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 402 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2021-11-21 01:37:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-21 01:37:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2021-11-21 01:37:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-21 01:37:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2021-11-21 01:37:49,318 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 29 [2021-11-21 01:37:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:49,318 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2021-11-21 01:37:49,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:37:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2021-11-21 01:37:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:37:49,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:49,320 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:49,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:37:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:37:49,522 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 201007013, now seen corresponding path program 3 times [2021-11-21 01:37:49,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849710501] [2021-11-21 01:37:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:49,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:37:49,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:49,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849710501] [2021-11-21 01:37:49,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849710501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:37:49,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79127027] [2021-11-21 01:37:49,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:37:49,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:49,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:49,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:37:50,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:37:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-21 01:37:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:50,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:50,069 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-21 01:37:50,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-21 01:37:50,114 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-21 01:37:50,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 01:37:50,177 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-11-21 01:37:50,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 45 [2021-11-21 01:37:50,262 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-21 01:37:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2021-11-21 01:37:50,372 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 01:37:50,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-21 01:37:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:51,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-11-21 01:37:52,406 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 1520 treesize of output 1516 [2021-11-21 01:37:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:52,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79127027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925950634] [2021-11-21 01:37:52,559 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:37:52,560 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:37:52,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:37:52,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:37:52,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:52,635 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:37:52,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:37:52,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:52,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 01:37:52,905 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:37:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:37:54,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:54,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:37:54,079 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 01:37:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 01:37:54,098 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:37:54,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 01:37:54,114 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:37:54,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 01:37:54,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:54,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:54,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:37:54,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:54,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:37:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:55,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:56,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:56,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:56,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:37:56,883 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:37:56,929 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:37:57,061 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:37:58,500 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 116 for LOIs [2021-11-21 01:38:03,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:03,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:03,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:38:03,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:03,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:38:06,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:38:06,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:38:06,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 15] total 36 [2021-11-21 01:38:06,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828319929] [2021-11-21 01:38:06,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:38:06,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 01:38:06,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 01:38:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2556, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 01:38:06,759 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:38:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:07,643 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2021-11-21 01:38:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:38:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2021-11-21 01:38:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:07,645 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:38:07,645 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 01:38:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-11-21 01:38:07,648 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:07,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 355 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 171 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2021-11-21 01:38:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 01:38:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-11-21 01:38:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:38:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-11-21 01:38:07,659 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2021-11-21 01:38:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:07,660 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-11-21 01:38:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:38:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-11-21 01:38:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:38:07,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:07,662 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:07,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:07,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:38:07,870 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1667218479, now seen corresponding path program 4 times [2021-11-21 01:38:07,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396503992] [2021-11-21 01:38:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:07,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:38:08,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:08,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396503992] [2021-11-21 01:38:08,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396503992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:38:08,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073433445] [2021-11-21 01:38:08,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:38:08,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:38:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:38:08,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:38:08,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:38:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-21 01:38:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:08,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:38:08,493 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:38:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:38:08,535 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-21 01:38:08,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2021-11-21 01:38:08,590 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 01:38:08,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-21 01:38:08,663 INFO L354 Elim1Store]: treesize reduction 172, result has 16.9 percent of original size [2021-11-21 01:38:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2021-11-21 01:38:08,753 INFO L354 Elim1Store]: treesize reduction 253, result has 15.1 percent of original size [2021-11-21 01:38:08,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 70 [2021-11-21 01:38:08,871 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 01:38:08,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 77 [2021-11-21 01:38:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:38:09,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:11,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2021-11-21 01:38:24,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 99 [2021-11-21 01:38:24,129 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:38:24,129 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 5833 treesize of output 5827 [2021-11-21 01:38:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:38:35,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073433445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627777431] [2021-11-21 01:38:35,463 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:38:35,463 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:38:35,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:38:35,463 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:38:35,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:38:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:35,534 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:38:35,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:38:35,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:35,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 01:38:35,788 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:38:36,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:38:36,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:38:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:38:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:38:36,980 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:38:36,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 01:38:37,003 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 01:38:37,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 01:38:37,019 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:38:37,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 01:38:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:38:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:37,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:38:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:38,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:38:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:38:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:38:39,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:38:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:38:39,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:38:40,023 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:38:40,075 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:38:40,237 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:38:41,915 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 116 for LOIs [2021-11-21 01:38:48,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:38:48,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:48,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:38:49,025 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:38:52,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:38:52,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:38:52,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 18] total 46 [2021-11-21 01:38:52,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210049911] [2021-11-21 01:38:52,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:38:52,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:38:52,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:38:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3682, Unknown=6, NotChecked=0, Total=3906 [2021-11-21 01:38:52,274 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 46 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 44 states have internal predecessors, (65), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:39:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:12,880 INFO L93 Difference]: Finished difference Result 136 states and 186 transitions. [2021-11-21 01:39:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:39:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 44 states have internal predecessors, (65), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 35 [2021-11-21 01:39:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:12,884 INFO L225 Difference]: With dead ends: 136 [2021-11-21 01:39:12,885 INFO L226 Difference]: Without dead ends: 94 [2021-11-21 01:39:12,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=414, Invalid=5893, Unknown=13, NotChecked=0, Total=6320 [2021-11-21 01:39:12,889 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:12,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 561 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1086 Invalid, 0 Unknown, 102 Unchecked, 3.5s Time] [2021-11-21 01:39:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-21 01:39:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2021-11-21 01:39:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 57 states have internal predecessors, (74), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-21 01:39:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-11-21 01:39:12,913 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 35 [2021-11-21 01:39:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:12,914 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-11-21 01:39:12,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 44 states have internal predecessors, (65), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:39:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-11-21 01:39:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:39:12,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:12,917 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:12,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:13,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:13,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:13,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1633385983, now seen corresponding path program 5 times [2021-11-21 01:39:13,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:13,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68442249] [2021-11-21 01:39:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:13,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:39:13,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68442249] [2021-11-21 01:39:13,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68442249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871949628] [2021-11-21 01:39:13,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:39:13,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:13,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:13,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:13,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:39:14,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:39:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:39:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-21 01:39:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:14,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:39:14,643 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-21 01:39:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-21 01:39:14,703 INFO L354 Elim1Store]: treesize reduction 64, result has 22.0 percent of original size [2021-11-21 01:39:14,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 01:39:14,778 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 01:39:14,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-21 01:39:14,873 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-21 01:39:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2021-11-21 01:39:15,003 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 01:39:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-21 01:39:15,195 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 01:39:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 93 [2021-11-21 01:39:15,508 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-21 01:39:15,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 105 [2021-11-21 01:39:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:39:28,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2021-11-21 01:39:36,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2021-11-21 01:39:36,795 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 1523 treesize of output 1519 [2021-11-21 01:39:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:39:37,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871949628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:37,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556313847] [2021-11-21 01:39:37,269 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:39:37,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:39:37,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:39:37,270 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:39:37,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:39:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:37,348 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:39:37,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 01:39:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:37,475 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:39:37,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:39:37,769 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:39:39,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:39:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:39,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:39,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:39,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:39,183 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:39:39,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 01:39:39,209 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:39:39,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 01:39:39,227 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 01:39:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 01:39:39,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:39,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:39:39,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:39:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:39:41,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:39:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:41,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:39:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:39:42,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:39:42,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:39:42,833 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:39:42,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:39:43,056 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:39:45,008 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 116 for LOIs [2021-11-21 01:39:51,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:51,943 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:39:52,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-21 01:39:52,176 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:39:56,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:39:56,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:39:56,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 24, 18] total 49 [2021-11-21 01:39:56,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865969081] [2021-11-21 01:39:56,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:39:56,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-21 01:39:56,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-21 01:39:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4029, Unknown=4, NotChecked=0, Total=4290 [2021-11-21 01:39:56,621 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 49 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 47 states have internal predecessors, (71), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:40:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:16,586 INFO L93 Difference]: Finished difference Result 135 states and 181 transitions. [2021-11-21 01:40:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 01:40:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 47 states have internal predecessors, (71), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2021-11-21 01:40:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:16,589 INFO L225 Difference]: With dead ends: 135 [2021-11-21 01:40:16,589 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 01:40:16,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=372, Invalid=5471, Unknown=9, NotChecked=0, Total=5852 [2021-11-21 01:40:16,593 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:16,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 612 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 304 Invalid, 0 Unknown, 179 Unchecked, 0.6s Time] [2021-11-21 01:40:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 01:40:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-11-21 01:40:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.423728813559322) internal successors, (84), 63 states have internal predecessors, (84), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-21 01:40:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 107 transitions. [2021-11-21 01:40:16,615 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 107 transitions. Word has length 38 [2021-11-21 01:40:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:16,616 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 107 transitions. [2021-11-21 01:40:16,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 47 states have internal predecessors, (71), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:40:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 107 transitions. [2021-11-21 01:40:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:40:16,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:16,619 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-21 01:40:16,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:16,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:16,826 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1459241881, now seen corresponding path program 1 times [2021-11-21 01:40:16,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:40:16,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093595551] [2021-11-21 01:40:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:16,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:40:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:40:16,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093595551] [2021-11-21 01:40:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093595551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:16,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:16,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:40:16,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992680713] [2021-11-21 01:40:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:16,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:40:16,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:40:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:40:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:40:16,963 INFO L87 Difference]: Start difference. First operand 79 states and 107 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:40:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:17,025 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2021-11-21 01:40:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:40:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-11-21 01:40:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:17,033 INFO L225 Difference]: With dead ends: 86 [2021-11-21 01:40:17,034 INFO L226 Difference]: Without dead ends: 79 [2021-11-21 01:40:17,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:40:17,035 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:17,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:40:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-21 01:40:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-21 01:40:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.423728813559322) internal successors, (84), 63 states have internal predecessors, (84), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-21 01:40:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2021-11-21 01:40:17,071 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 42 [2021-11-21 01:40:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:17,071 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2021-11-21 01:40:17,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:40:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2021-11-21 01:40:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:40:17,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:17,074 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:17,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:40:17,074 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash 340537517, now seen corresponding path program 6 times [2021-11-21 01:40:17,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:40:17,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922516854] [2021-11-21 01:40:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:17,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:40:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:40:17,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922516854] [2021-11-21 01:40:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922516854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:40:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62045100] [2021-11-21 01:40:17,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:40:17,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:17,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:17,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:17,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91e11df-32fb-462e-9346-af3c39e432fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:40:18,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:40:18,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-21 01:40:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:18,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:40:18,257 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:40:18,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 01:40:18,319 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-21 01:40:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 01:40:18,411 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-11-21 01:40:18,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 45 [2021-11-21 01:40:18,537 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-21 01:40:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 58 [2021-11-21 01:40:18,708 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 01:40:18,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-21 01:40:18,899 INFO L354 Elim1Store]: treesize reduction 332, result has 13.8 percent of original size [2021-11-21 01:40:18,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 67 treesize of output 81 [2021-11-21 01:40:19,132 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-21 01:40:19,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 92 [2021-11-21 01:40:19,441 INFO L354 Elim1Store]: treesize reduction 524, result has 11.9 percent of original size [2021-11-21 01:40:19,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 109 treesize of output 101 [2021-11-21 01:40:21,794 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_81 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83 Int)) (let ((.cse1 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_81))) (let ((.cse0 (select .cse1 (+ 4 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83)))) (and (= .cse0 (select .cse1 (+ 2 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83))) (= .cse0 (select .cse1 (+ 3 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83))) (= .cse0 (select .cse1 (+ 5 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83))) (= .cse0 (select .cse1 (+ 7 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83))) (= .cse0 (select .cse1 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83)) (= .cse0 (select .cse1 (+ 8 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83))) (= .cse0 (select .cse1 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83 1))) (= (select .cse1 (+ 6 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_83)) .cse0))))) is different from true [2021-11-21 01:40:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:42,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 125 [2021-11-21 01:40:50,800 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:40:50,801 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 25435 treesize of output 25427