./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:26:46,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:26:46,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:26:46,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:26:46,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:26:46,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:26:46,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:26:46,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:26:46,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:26:46,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:26:46,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:26:46,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:26:46,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:26:46,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:26:46,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:26:46,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:26:46,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:26:46,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:26:46,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:26:46,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:26:46,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:26:46,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:26:46,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:26:46,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:26:46,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:26:46,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:26:46,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:26:46,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:26:46,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:26:46,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:26:46,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:26:46,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:26:46,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:26:46,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:26:46,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:26:46,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:26:46,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:26:46,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:26:46,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:26:46,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:26:46,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:26:46,413 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:26:46,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:26:46,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:26:46,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:26:46,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:26:46,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:26:46,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:26:46,466 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:26:46,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:26:46,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:26:46,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:26:46,474 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:26:46,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:26:46,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:26:46,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:26:46,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:26:46,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:26:46,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:26:46,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:26:46,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:26:46,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:26:46,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:26:46,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:26:46,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:26:46,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:26:46,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:26:46,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:26:46,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:26:46,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:26:46,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:26:46,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:26:46,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:26:46,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:26:46,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:26:46,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:26:46,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:26:46,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:26:46,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:26:46,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:26:46,483 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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2021-11-21 00:26:46,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:26:46,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:26:46,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:26:46,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:26:46,848 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:26:46,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-11-21 00:26:46,936 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/data/ebdfe9e39/db9445011b8a4e159df12c6c68f80d3e/FLAG3e5b2a2f3 [2021-11-21 00:26:47,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:26:47,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-11-21 00:26:47,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/data/ebdfe9e39/db9445011b8a4e159df12c6c68f80d3e/FLAG3e5b2a2f3 [2021-11-21 00:26:47,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/data/ebdfe9e39/db9445011b8a4e159df12c6c68f80d3e [2021-11-21 00:26:47,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:26:47,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:26:47,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:26:47,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:26:47,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:26:47,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:26:47" (1/1) ... [2021-11-21 00:26:47,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2318029b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:47, skipping insertion in model container [2021-11-21 00:26:47,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:26:47" (1/1) ... [2021-11-21 00:26:47,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:26:48,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:26:48,394 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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2021-11-21 00:26:48,402 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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2021-11-21 00:26:49,352 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,372 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,373 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,375 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,379 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,380 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,381 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:49,759 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:26:49,761 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:26:49,762 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:26:49,763 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:26:49,765 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:26:49,766 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:26:49,767 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:26:49,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:26:49,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:26:49,769 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:26:49,975 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:26:50,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:26:50,069 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:26:50,101 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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2021-11-21 00:26:50,110 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_ab347c0f-5ffc-4069-a474-e4bba02f93e1/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2021-11-21 00:26:50,158 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,159 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,159 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,160 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,161 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,176 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,176 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:26:50,221 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:26:50,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:26:50,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:26:50,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:26:50,226 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:26:50,226 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:26:50,227 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:26:50,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:26:50,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:26:50,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:26:50,257 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:26:50,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:26:50,637 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:26:50,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50 WrapperNode [2021-11-21 00:26:50,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:26:50,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:26:50,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:26:50,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:26:50,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,830 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-11-21 00:26:50,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:26:50,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:26:50,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:26:50,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:26:50,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:26:50,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:26:50,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:26:50,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:26:50,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (1/1) ... [2021-11-21 00:26:50,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:26:50,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:50,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:26:51,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:26:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:26:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:26:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:26:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:26:51,050 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:26:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:26:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 00:26:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 00:26:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:26:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:26:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:26:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:26:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:26:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:26:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:26:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:26:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:26:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:26:51,053 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:26:51,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:26:51,362 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:26:51,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:26:51,723 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:26:51,853 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:26:51,853 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:26:51,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:26:51 BoogieIcfgContainer [2021-11-21 00:26:51,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:26:51,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:26:51,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:26:51,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:26:51,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:26:47" (1/3) ... [2021-11-21 00:26:51,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f28264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:26:51, skipping insertion in model container [2021-11-21 00:26:51,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:26:50" (2/3) ... [2021-11-21 00:26:51,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f28264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:26:51, skipping insertion in model container [2021-11-21 00:26:51,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:26:51" (3/3) ... [2021-11-21 00:26:51,864 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2021-11-21 00:26:51,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:26:51,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:26:51,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:26:51,929 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:26:51,929 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:26:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 00:26:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:26:51,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:51,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:26:51,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2021-11-21 00:26:51,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:51,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097967923] [2021-11-21 00:26:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:51,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:26:52,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097967923] [2021-11-21 00:26:52,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097967923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:52,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877987329] [2021-11-21 00:26:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:52,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:52,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:52,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:26:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-21 00:26:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:26:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:26:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 00:26:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-21 00:26:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:26:56,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:26:56,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877987329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:26:56,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:26:56,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-21 00:26:56,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561594386] [2021-11-21 00:26:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:26:56,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:26:56,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:26:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:26:56,111 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:26:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:56,598 INFO L93 Difference]: Finished difference Result 115 states and 170 transitions. [2021-11-21 00:26:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:26:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2021-11-21 00:26:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:56,611 INFO L225 Difference]: With dead ends: 115 [2021-11-21 00:26:56,612 INFO L226 Difference]: Without dead ends: 77 [2021-11-21 00:26:56,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:26:56,620 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 14 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:56,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 267 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 106 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2021-11-21 00:26:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-21 00:26:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-11-21 00:26:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-21 00:26:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2021-11-21 00:26:56,679 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 37 [2021-11-21 00:26:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:56,680 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2021-11-21 00:26:56,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:26:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2021-11-21 00:26:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:26:56,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:56,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:26:56,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:26:56,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:26:56,904 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:56,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2021-11-21 00:26:56,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:56,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577872012] [2021-11-21 00:26:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:56,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:26:57,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577872012] [2021-11-21 00:26:57,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577872012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24710072] [2021-11-21 00:26:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:57,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:57,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:57,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:26:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-21 00:26:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:26:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:26:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-21 00:26:57,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 76 [2021-11-21 00:26:57,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,787 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-21 00:26:57,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 186 treesize of output 140 [2021-11-21 00:26:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,870 INFO L354 Elim1Store]: treesize reduction 276, result has 16.4 percent of original size [2021-11-21 00:26:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 161 treesize of output 149 [2021-11-21 00:27:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:27:04,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:27:27,595 WARN L227 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:27:29,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_1 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse3 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8)) (.cse4 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse4) 0)) (not (= (select (select (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse6 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse6 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse4) 0))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_6 Int)) (let ((.cse8 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse10 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8))) (or (not (= (select (select (let ((.cse7 (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse9 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse9 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_6 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse8 v_subst_6))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)) (not (= 0 (select (select (let ((.cse11 (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_2 Int)) (= (select (select (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_5 Int)) (= (select (select (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_5 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_5))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_4 Int)) (= (select (select (let ((.cse17 (let ((.cse18 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse18 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse18 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_4))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_3 Int)) (= (select (select (let ((.cse19 (let ((.cse20 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) 0))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) is different from false [2021-11-21 00:27:31,017 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:27:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4084243 treesize of output 4072763 [2021-11-21 00:33:02,384 WARN L227 SmtUtils]: Spent 5.52m on a formula simplification. DAG size of input: 2245 DAG size of output: 2237 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:33:02,605 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:33:02,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4009122 treesize of output 4008764 [2021-11-21 00:34:18,323 WARN L227 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 2780 DAG size of output: 2780 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:34:18,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:34:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200199809] [2021-11-21 00:34:18,413 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 00:34:18,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:18,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:18,426 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:18,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:18,636 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:34:18,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:34:18,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:18,781 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:34:18,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:34:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:34:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:21,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:34:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:21,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:22,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:22,125 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:34:22,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:34:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,327 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 00:34:22,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:34:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:34:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,570 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:34:22,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:34:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:22,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:34:22,801 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:34:22,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:34:22,845 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:34:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 00:34:22,877 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:34:22,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 94 [2021-11-21 00:34:22,913 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:34:22,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 00:34:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:34:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:34:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:34:23,349 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:34:23,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:34:23,404 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:34:23,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 00:34:23,430 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:34:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 94 [2021-11-21 00:34:23,456 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:34:23,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 00:34:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:34:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:23,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:34:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:34:26,205 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 46 for LOIs [2021-11-21 00:34:27,871 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-21 00:34:27,954 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:34:28,088 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:30,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [200199809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:30,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:30,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2021-11-21 00:34:30,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862472632] [2021-11-21 00:34:30,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:30,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:34:30,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:34:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=4, NotChecked=56, Total=930 [2021-11-21 00:34:30,154 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:34:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:30,747 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2021-11-21 00:34:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:34:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2021-11-21 00:34:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:30,751 INFO L225 Difference]: With dead ends: 98 [2021-11-21 00:34:30,751 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 00:34:30,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=4, NotChecked=58, Total=992 [2021-11-21 00:34:30,753 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:30,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 287 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-11-21 00:34:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 00:34:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-11-21 00:34:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 00:34:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-11-21 00:34:30,765 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2021-11-21 00:34:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:30,766 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-11-21 00:34:30,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:34:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-11-21 00:34:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:34:30,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:30,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:30,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:34:30,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:30,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2021-11-21 00:34:30,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684741203] [2021-11-21 00:34:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:30,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:31,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684741203] [2021-11-21 00:34:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684741203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263164942] [2021-11-21 00:34:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:31,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:31,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:31,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:34:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:31,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:34:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:34:31,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:34:31,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263164942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:31,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:31,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-21 00:34:31,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478233533] [2021-11-21 00:34:31,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:31,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:34:31,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:34:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:34:31,381 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:34:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:31,510 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2021-11-21 00:34:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:34:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2021-11-21 00:34:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:31,512 INFO L225 Difference]: With dead ends: 86 [2021-11-21 00:34:31,512 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 00:34:31,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:34:31,514 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:31,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 147 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:34:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 00:34:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-21 00:34:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-21 00:34:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-11-21 00:34:31,528 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2021-11-21 00:34:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:31,528 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-11-21 00:34:31,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:34:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-11-21 00:34:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:34:31,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:31,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:31,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:31,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:31,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2021-11-21 00:34:31,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:31,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096109820] [2021-11-21 00:34:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:31,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:31,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096109820] [2021-11-21 00:34:31,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096109820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:31,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700604897] [2021-11-21 00:34:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:31,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:31,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:31,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:31,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:34:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:34:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:34:32,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:34:32,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700604897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:32,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:32,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 00:34:32,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225404650] [2021-11-21 00:34:32,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:34:32,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:34:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:34:32,175 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:34:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:32,446 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2021-11-21 00:34:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:34:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2021-11-21 00:34:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:32,449 INFO L225 Difference]: With dead ends: 103 [2021-11-21 00:34:32,449 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 00:34:32,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:34:32,452 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:32,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:34:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 00:34:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-11-21 00:34:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-21 00:34:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2021-11-21 00:34:32,470 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2021-11-21 00:34:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:32,471 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2021-11-21 00:34:32,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:34:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2021-11-21 00:34:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 00:34:32,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:32,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:32,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:32,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-21 00:34:32,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:32,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2021-11-21 00:34:32,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:32,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565592096] [2021-11-21 00:34:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:32,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:32,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565592096] [2021-11-21 00:34:32,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565592096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415490660] [2021-11-21 00:34:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:32,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:32,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:32,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:34:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:34:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:34:33,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:34:33,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415490660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:33,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:33,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-21 00:34:33,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532667050] [2021-11-21 00:34:33,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:33,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:34:33,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:34:33,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:34:33,123 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:34:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:33,194 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2021-11-21 00:34:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:34:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2021-11-21 00:34:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:33,196 INFO L225 Difference]: With dead ends: 104 [2021-11-21 00:34:33,196 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 00:34:33,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:34:33,199 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:33,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:34:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 00:34:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-11-21 00:34:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-21 00:34:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-21 00:34:33,227 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2021-11-21 00:34:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:33,229 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-21 00:34:33,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:34:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-21 00:34:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:34:33,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:33,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:33,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:33,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:33,446 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2021-11-21 00:34:33,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:33,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888099539] [2021-11-21 00:34:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:33,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:33,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:33,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888099539] [2021-11-21 00:34:33,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888099539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:33,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234405419] [2021-11-21 00:34:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:33,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:33,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:33,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:34:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-21 00:34:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:34:33,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 00:34:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:34:42,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:34:47,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234405419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:47,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855448035] [2021-11-21 00:34:47,720 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 00:34:47,720 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:47,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:47,720 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:47,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:47,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:47,865 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:34:47,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:34:47,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:47,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:34:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:34:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:34:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:50,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:34:51,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:34:51,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:51,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:34:56,832 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 124 for LOIs [2021-11-21 00:35:00,664 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-21 00:35:00,729 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:35:00,969 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 124 for LOIs [2021-11-21 00:35:01,600 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:05,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [855448035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:05,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:35:05,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 16, 8] total 41 [2021-11-21 00:35:05,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646626125] [2021-11-21 00:35:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:05,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:35:05,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:35:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:35:05,935 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:35:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:06,761 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2021-11-21 00:35:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:35:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2021-11-21 00:35:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:06,763 INFO L225 Difference]: With dead ends: 132 [2021-11-21 00:35:06,763 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 00:35:06,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:35:06,765 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 33 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:06,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 341 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 0 Unknown, 23 Unchecked, 0.8s Time] [2021-11-21 00:35:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 00:35:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-11-21 00:35:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (32), 22 states have call predecessors, (32), 23 states have call successors, (32) [2021-11-21 00:35:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2021-11-21 00:35:06,789 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 45 [2021-11-21 00:35:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:06,790 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2021-11-21 00:35:06,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:35:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2021-11-21 00:35:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:35:06,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:06,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:06,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:07,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:07,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2021-11-21 00:35:07,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188500455] [2021-11-21 00:35:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:07,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:35:07,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:07,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188500455] [2021-11-21 00:35:07,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188500455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:07,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545444216] [2021-11-21 00:35:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:07,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:07,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:35:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:07,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-21 00:35:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:35:07,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:07,578 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:35:07,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 81 [2021-11-21 00:35:07,593 INFO L354 Elim1Store]: treesize reduction 47, result has 24.2 percent of original size [2021-11-21 00:35:07,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 87 [2021-11-21 00:35:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:35:17,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:35:24,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545444216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:35:24,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997761791] [2021-11-21 00:35:24,593 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 00:35:24,593 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:24,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:24,594 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:24,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:24,718 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:35:24,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:35:24,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:24,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:35:26,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:35:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:35:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:26,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:26,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:26,989 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:35:26,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:35:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,140 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 00:35:27,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:35:27,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:35:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:27,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:35:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:27,538 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:35:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:35:27,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:35:27,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:35:27,872 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:35:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:35:27,908 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:35:27,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 00:35:27,931 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:35:27,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 100 [2021-11-21 00:35:27,967 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:35:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 00:35:28,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:28,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:35:28,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:35:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:28,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:28,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:30,923 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 45 for LOIs [2021-11-21 00:35:34,391 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 00:35:34,422 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:35:34,541 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 75 for LOIs [2021-11-21 00:35:34,847 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:39,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1997761791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:39,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:35:39,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 18, 10] total 47 [2021-11-21 00:35:39,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604925509] [2021-11-21 00:35:39,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:39,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 00:35:39,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 00:35:39,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1994, Unknown=1, NotChecked=0, Total=2162 [2021-11-21 00:35:39,017 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:35:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:39,853 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2021-11-21 00:35:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:35:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2021-11-21 00:35:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:39,855 INFO L225 Difference]: With dead ends: 149 [2021-11-21 00:35:39,855 INFO L226 Difference]: Without dead ends: 102 [2021-11-21 00:35:39,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=182, Invalid=2169, Unknown=1, NotChecked=0, Total=2352 [2021-11-21 00:35:39,857 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:39,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 225 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 258 Invalid, 0 Unknown, 162 Unchecked, 0.4s Time] [2021-11-21 00:35:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-21 00:35:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2021-11-21 00:35:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.25) internal successors, (70), 59 states have internal predecessors, (70), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (33), 23 states have call predecessors, (33), 24 states have call successors, (33) [2021-11-21 00:35:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2021-11-21 00:35:39,887 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 46 [2021-11-21 00:35:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2021-11-21 00:35:39,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:35:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2021-11-21 00:35:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:35:39,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:39,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:39,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:35:40,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:40,103 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2021-11-21 00:35:40,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:40,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691226779] [2021-11-21 00:35:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:40,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:35:40,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691226779] [2021-11-21 00:35:40,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691226779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540237446] [2021-11-21 00:35:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:40,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:40,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:40,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:40,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:35:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-21 00:35:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:40,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:40,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 00:35:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:35:41,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:41,339 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 82 treesize of output 78 [2021-11-21 00:35:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:35:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540237446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:35:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189622934] [2021-11-21 00:35:41,524 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:35:41,524 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:41,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:41,525 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:41,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:41,613 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:35:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:35:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:35:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:35:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:43,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:35:43,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:35:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:35:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:43,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:35:48,762 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 124 for LOIs [2021-11-21 00:35:55,206 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-21 00:35:55,259 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:35:55,389 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 124 for LOIs [2021-11-21 00:35:55,777 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:01,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1189622934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:01,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:36:01,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [8, 11, 10] total 41 [2021-11-21 00:36:01,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253715665] [2021-11-21 00:36:01,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:01,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:36:01,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:36:01,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:36:01,057 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:36:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:02,013 INFO L93 Difference]: Finished difference Result 156 states and 209 transitions. [2021-11-21 00:36:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:36:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2021-11-21 00:36:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:02,016 INFO L225 Difference]: With dead ends: 156 [2021-11-21 00:36:02,016 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 00:36:02,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:36:02,018 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 25 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:02,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 354 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 373 Invalid, 0 Unknown, 24 Unchecked, 0.9s Time] [2021-11-21 00:36:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 00:36:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-11-21 00:36:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 58 states have internal predecessors, (67), 24 states have call successors, (24), 10 states have call predecessors, (24), 11 states have return successors, (32), 22 states have call predecessors, (32), 23 states have call successors, (32) [2021-11-21 00:36:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2021-11-21 00:36:02,045 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 47 [2021-11-21 00:36:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:02,045 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2021-11-21 00:36:02,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:36:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2021-11-21 00:36:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:36:02,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:02,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:02,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:02,263 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2021-11-21 00:36:02,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093659863] [2021-11-21 00:36:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:02,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:36:02,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:02,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093659863] [2021-11-21 00:36:02,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093659863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:02,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027027004] [2021-11-21 00:36:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:02,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:02,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:02,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:02,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:36:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-21 00:36:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:36:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:02,848 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:36:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 48 [2021-11-21 00:36:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:36:03,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:05,868 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 3177 treesize of output 3145 [2021-11-21 00:36:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:36:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027027004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741082378] [2021-11-21 00:36:06,389 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:36:06,390 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:06,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:06,390 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:06,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:06,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:06,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:06,508 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:36:06,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:36:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:06,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:36:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:36:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:36:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:08,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,053 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:36:09,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:36:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,243 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:36:09,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:36:09,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,374 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:36:09,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:36:09,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:09,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,623 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:36:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:36:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:36:09,760 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:36:09,761 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:36:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:10,135 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:36:10,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:36:10,642 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:36:10,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 503 treesize of output 593 [2021-11-21 00:36:11,049 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:36:11,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 587 treesize of output 668 [2021-11-21 00:36:11,122 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-21 00:36:11,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 668 treesize of output 651 [2021-11-21 00:36:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 648 treesize of output 635 [2021-11-21 00:36:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:11,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:11,381 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:36:11,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 629 treesize of output 645 [2021-11-21 00:36:11,452 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:36:11,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 00:36:23,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:36:23,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:36:23,691 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:36:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:36:23,712 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:36:23,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-21 00:36:23,737 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:36:23,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 00:36:23,766 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:36:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 00:36:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:23,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:36:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:23,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:36:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:23,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:27,061 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-21 00:36:33,448 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:36:33,483 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:36:33,578 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:36:34,101 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:36,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [741082378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:36,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:36:36,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 12, 11] total 46 [2021-11-21 00:36:36,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49183537] [2021-11-21 00:36:36,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:36,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:36:36,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:36:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1898, Unknown=1, NotChecked=0, Total=2070 [2021-11-21 00:36:36,911 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:36:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:38,322 INFO L93 Difference]: Finished difference Result 171 states and 217 transitions. [2021-11-21 00:36:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:36:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-21 00:36:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:38,324 INFO L225 Difference]: With dead ends: 171 [2021-11-21 00:36:38,324 INFO L226 Difference]: Without dead ends: 119 [2021-11-21 00:36:38,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=195, Invalid=2156, Unknown=1, NotChecked=0, Total=2352 [2021-11-21 00:36:38,326 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 42 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:38,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 182 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 468 Invalid, 0 Unknown, 86 Unchecked, 0.7s Time] [2021-11-21 00:36:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-21 00:36:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2021-11-21 00:36:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 76 states have internal predecessors, (87), 26 states have call successors, (26), 13 states have call predecessors, (26), 14 states have return successors, (29), 24 states have call predecessors, (29), 25 states have call successors, (29) [2021-11-21 00:36:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2021-11-21 00:36:38,358 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 48 [2021-11-21 00:36:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2021-11-21 00:36:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:36:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2021-11-21 00:36:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:36:38,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:38,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:38,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:38,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:38,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1296101873, now seen corresponding path program 1 times [2021-11-21 00:36:38,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585154340] [2021-11-21 00:36:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:38,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:36:38,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585154340] [2021-11-21 00:36:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585154340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010218133] [2021-11-21 00:36:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:38,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:38,700 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:38,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:36:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-21 00:36:38,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:36:38,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:36:38,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-21 00:36:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:39,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:39,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 00:36:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:36:43,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:36:48,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010218133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:48,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208808613] [2021-11-21 00:36:48,490 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:36:48,490 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:48,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:48,491 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:48,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:48,606 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:36:48,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:36:48,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:48,705 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:36:48,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:36:50,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:50,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:36:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:36:51,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:51,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:36:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:36:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:36:51,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:51,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:04,880 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2021-11-21 00:37:05,952 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 20 for LOIs [2021-11-21 00:37:11,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 00:37:11,287 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:37:11,402 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:37:12,082 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:37:19,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:37:19,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:37:19,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2021-11-21 00:37:19,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046384287] [2021-11-21 00:37:19,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:37:19,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:37:19,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:37:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2551, Unknown=0, NotChecked=0, Total=2862 [2021-11-21 00:37:19,741 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 26 states, 22 states have (on average 3.0) internal successors, (66), 24 states have internal predecessors, (66), 10 states have call successors, (21), 3 states have call predecessors, (21), 9 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-21 00:37:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:22,294 INFO L93 Difference]: Finished difference Result 301 states and 449 transitions. [2021-11-21 00:37:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 00:37:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 24 states have internal predecessors, (66), 10 states have call successors, (21), 3 states have call predecessors, (21), 9 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) Word has length 48 [2021-11-21 00:37:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:22,299 INFO L225 Difference]: With dead ends: 301 [2021-11-21 00:37:22,299 INFO L226 Difference]: Without dead ends: 236 [2021-11-21 00:37:22,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=423, Invalid=3867, Unknown=0, NotChecked=0, Total=4290 [2021-11-21 00:37:22,303 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 67 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:22,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 563 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1103 Invalid, 0 Unknown, 174 Unchecked, 1.6s Time] [2021-11-21 00:37:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-21 00:37:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 189. [2021-11-21 00:37:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 127 states have internal predecessors, (144), 46 states have call successors, (46), 17 states have call predecessors, (46), 23 states have return successors, (74), 44 states have call predecessors, (74), 45 states have call successors, (74) [2021-11-21 00:37:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 264 transitions. [2021-11-21 00:37:22,389 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 264 transitions. Word has length 48 [2021-11-21 00:37:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:22,389 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 264 transitions. [2021-11-21 00:37:22,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 24 states have internal predecessors, (66), 10 states have call successors, (21), 3 states have call predecessors, (21), 9 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2021-11-21 00:37:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 264 transitions. [2021-11-21 00:37:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:37:22,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:22,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:22,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:22,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:37:22,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -150880783, now seen corresponding path program 1 times [2021-11-21 00:37:22,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5600636] [2021-11-21 00:37:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:22,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:37:22,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5600636] [2021-11-21 00:37:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5600636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939249530] [2021-11-21 00:37:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:22,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:22,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:22,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:22,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:37:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:37:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:37:23,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939249530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:23,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:23,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-11-21 00:37:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331369193] [2021-11-21 00:37:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:23,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:37:23,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:37:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:37:23,107 INFO L87 Difference]: Start difference. First operand 189 states and 264 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:37:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:23,310 INFO L93 Difference]: Finished difference Result 275 states and 396 transitions. [2021-11-21 00:37:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:37:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-11-21 00:37:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:23,314 INFO L225 Difference]: With dead ends: 275 [2021-11-21 00:37:23,314 INFO L226 Difference]: Without dead ends: 189 [2021-11-21 00:37:23,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:37:23,316 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:23,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 174 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:37:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-21 00:37:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-21 00:37:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 119 states have (on average 1.184873949579832) internal successors, (141), 127 states have internal predecessors, (141), 46 states have call successors, (46), 17 states have call predecessors, (46), 23 states have return successors, (74), 44 states have call predecessors, (74), 45 states have call successors, (74) [2021-11-21 00:37:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 261 transitions. [2021-11-21 00:37:23,374 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 261 transitions. Word has length 52 [2021-11-21 00:37:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:23,374 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 261 transitions. [2021-11-21 00:37:23,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:37:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 261 transitions. [2021-11-21 00:37:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 00:37:23,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:23,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:23,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:23,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:23,577 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2078798571, now seen corresponding path program 1 times [2021-11-21 00:37:23,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:23,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290299996] [2021-11-21 00:37:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:23,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:37:23,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290299996] [2021-11-21 00:37:23,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290299996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167297066] [2021-11-21 00:37:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:23,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:23,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:23,744 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:23,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:37:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:37:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:37:24,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167297066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:24,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:24,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-21 00:37:24,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188420668] [2021-11-21 00:37:24,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:24,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:37:24,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:24,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:37:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:37:24,079 INFO L87 Difference]: Start difference. First operand 189 states and 261 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:37:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:24,341 INFO L93 Difference]: Finished difference Result 283 states and 405 transitions. [2021-11-21 00:37:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:37:24,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2021-11-21 00:37:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:24,344 INFO L225 Difference]: With dead ends: 283 [2021-11-21 00:37:24,344 INFO L226 Difference]: Without dead ends: 196 [2021-11-21 00:37:24,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:37:24,346 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:24,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 211 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:37:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-21 00:37:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 185. [2021-11-21 00:37:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 123 states have internal predecessors, (136), 46 states have call successors, (46), 17 states have call predecessors, (46), 22 states have return successors, (64), 44 states have call predecessors, (64), 45 states have call successors, (64) [2021-11-21 00:37:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2021-11-21 00:37:24,412 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 56 [2021-11-21 00:37:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:24,412 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2021-11-21 00:37:24,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:37:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2021-11-21 00:37:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 00:37:24,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:24,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:24,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:24,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:24,627 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash 48483986, now seen corresponding path program 1 times [2021-11-21 00:37:24,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:24,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471927791] [2021-11-21 00:37:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:24,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:37:24,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:24,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471927791] [2021-11-21 00:37:24,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471927791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:24,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408147505] [2021-11-21 00:37:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:24,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:24,732 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:24,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:37:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:24,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-21 00:37:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:25,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:37:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,096 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-21 00:37:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 77 [2021-11-21 00:37:25,108 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:37:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 67 [2021-11-21 00:37:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:37:28,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:37:36,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408147505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:37:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302520158] [2021-11-21 00:37:36,352 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 00:37:36,352 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:37:36,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:37:36,353 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:37:36,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:37:36,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:36,422 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:37:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:37:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:36,551 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:37:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:37:38,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:37:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:38,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:37:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:37:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:37:39,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:39,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:39,319 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:37:39,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:37:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,510 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 00:37:39,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:37:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:37:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:37:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:40,014 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:37:40,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:37:40,138 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:37:40,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:37:40,177 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:37:40,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 00:37:40,212 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:37:40,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 00:37:40,231 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:37:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 00:37:40,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:37:40,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:37:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:40,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:37:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:40,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:37:40,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:40,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:40,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:40,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:43,905 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 45 for LOIs [2021-11-21 00:37:50,515 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 00:37:50,535 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:37:50,627 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:37:51,112 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:37:54,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [302520158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:54,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:37:54,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 19, 14] total 54 [2021-11-21 00:37:54,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459156168] [2021-11-21 00:37:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:37:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:37:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2657, Unknown=0, NotChecked=0, Total=2862 [2021-11-21 00:37:54,011 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:37:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:55,133 INFO L93 Difference]: Finished difference Result 239 states and 318 transitions. [2021-11-21 00:37:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:37:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2021-11-21 00:37:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:55,135 INFO L225 Difference]: With dead ends: 239 [2021-11-21 00:37:55,135 INFO L226 Difference]: Without dead ends: 185 [2021-11-21 00:37:55,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 00:37:55,138 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:55,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 234 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 392 Invalid, 0 Unknown, 169 Unchecked, 0.5s Time] [2021-11-21 00:37:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-21 00:37:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-21 00:37:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 123 states have internal predecessors, (135), 46 states have call successors, (46), 17 states have call predecessors, (46), 22 states have return successors, (64), 44 states have call predecessors, (64), 45 states have call successors, (64) [2021-11-21 00:37:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 245 transitions. [2021-11-21 00:37:55,188 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 245 transitions. Word has length 60 [2021-11-21 00:37:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:55,188 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 245 transitions. [2021-11-21 00:37:55,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:37:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 245 transitions. [2021-11-21 00:37:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:37:55,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:55,191 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:55,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:55,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:37:55,399 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash -894820411, now seen corresponding path program 1 times [2021-11-21 00:37:55,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:55,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189156117] [2021-11-21 00:37:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:55,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:37:55,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189156117] [2021-11-21 00:37:55,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189156117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317053200] [2021-11-21 00:37:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:55,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:55,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:55,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:37:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:37:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:37:55,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:37:56,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317053200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:37:56,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35179750] [2021-11-21 00:37:56,154 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:37:56,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:37:56,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:37:56,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:37:56,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:37:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:56,292 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:37:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:37:56,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:37:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:37:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:37:58,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:37:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:37:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:58,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:58,973 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:37:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:37:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,158 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:37:59,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:37:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:59,434 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:37:59,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:37:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,643 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:37:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:37:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:59,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:59,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:37:59,925 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:37:59,926 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:38:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:00,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:00,317 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:38:00,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:38:00,614 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:38:00,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 503 treesize of output 584 [2021-11-21 00:38:00,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:00,879 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:38:00,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 584 treesize of output 600 [2021-11-21 00:38:01,249 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:38:01,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 633 treesize of output 723 [2021-11-21 00:38:01,319 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 00:38:01,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 717 treesize of output 688 [2021-11-21 00:38:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:01,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 685 treesize of output 672 [2021-11-21 00:38:01,405 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:38:01,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 00:38:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:38:12,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:38:13,053 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:38:13,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:38:13,098 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:38:13,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 00:38:13,133 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:38:13,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 00:38:13,158 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:38:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 00:38:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:38:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:38:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:38:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:38:20,032 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2021-11-21 00:38:20,328 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:38:26,964 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:38:26,997 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:38:27,094 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:38:27,555 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:31,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:31,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:38:31,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2021-11-21 00:38:31,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162907292] [2021-11-21 00:38:31,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:31,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:38:31,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:38:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:38:31,908 INFO L87 Difference]: Start difference. First operand 185 states and 245 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-21 00:38:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:32,124 INFO L93 Difference]: Finished difference Result 273 states and 388 transitions. [2021-11-21 00:38:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:38:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2021-11-21 00:38:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:32,127 INFO L225 Difference]: With dead ends: 273 [2021-11-21 00:38:32,127 INFO L226 Difference]: Without dead ends: 193 [2021-11-21 00:38:32,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:38:32,130 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:32,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 502 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:38:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-21 00:38:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2021-11-21 00:38:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 118 states have (on average 1.152542372881356) internal successors, (136), 126 states have internal predecessors, (136), 46 states have call successors, (46), 17 states have call predecessors, (46), 23 states have return successors, (71), 44 states have call predecessors, (71), 45 states have call successors, (71) [2021-11-21 00:38:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 253 transitions. [2021-11-21 00:38:32,186 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 253 transitions. Word has length 63 [2021-11-21 00:38:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:32,187 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 253 transitions. [2021-11-21 00:38:32,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-21 00:38:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 253 transitions. [2021-11-21 00:38:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 00:38:32,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:32,189 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:32,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:32,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:38:32,413 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash 292884767, now seen corresponding path program 1 times [2021-11-21 00:38:32,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:32,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616449523] [2021-11-21 00:38:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:32,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 00:38:32,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:32,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616449523] [2021-11-21 00:38:32,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616449523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:32,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581826906] [2021-11-21 00:38:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:32,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:32,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:32,532 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:32,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:38:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:32,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 00:38:32,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:32,778 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:38:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-21 00:38:32,800 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 00:38:32,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-21 00:38:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:38:47,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:38:48,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581826906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:38:48,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465219927] [2021-11-21 00:38:48,941 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:38:48,941 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:48,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:48,942 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:48,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:49,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,050 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:38:49,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:38:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,184 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:38:49,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:38:50,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:38:50,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:38:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:50,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:38:51,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:38:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:51,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:51,249 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:38:51,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:38:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:51,335 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:38:51,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:38:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:38:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,569 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:38:51,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:38:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:38:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,854 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:38:51,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:38:51,970 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:38:51,971 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:38:52,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:52,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:52,293 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:38:52,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 418 treesize of output 446 [2021-11-21 00:38:52,589 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:38:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 503 treesize of output 584 [2021-11-21 00:38:52,933 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:38:52,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 584 treesize of output 674 [2021-11-21 00:38:53,015 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-21 00:38:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 668 treesize of output 651 [2021-11-21 00:38:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 648 treesize of output 635 [2021-11-21 00:38:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:53,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:53,297 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:38:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 629 treesize of output 645 [2021-11-21 00:38:53,388 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:38:53,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-21 00:39:04,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:39:04,272 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:39:04,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:39:04,297 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:39:04,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 00:39:04,320 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:39:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 86 [2021-11-21 00:39:04,337 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:39:04,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 00:39:04,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:39:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:04,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:39:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:04,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:39:04,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:04,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:39:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:39:10,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2021-11-21 00:39:10,518 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:39:16,295 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:39:16,326 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-21 00:39:16,414 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:39:16,883 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:39:22,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:39:22,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:39:22,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 14] total 36 [2021-11-21 00:39:22,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128880887] [2021-11-21 00:39:22,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:39:22,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 00:39:22,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 00:39:22,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3727, Unknown=4, NotChecked=0, Total=4032 [2021-11-21 00:39:22,823 INFO L87 Difference]: Start difference. First operand 188 states and 253 transitions. Second operand has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-21 00:39:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:27,430 INFO L93 Difference]: Finished difference Result 363 states and 537 transitions. [2021-11-21 00:39:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 00:39:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) Word has length 65 [2021-11-21 00:39:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:27,433 INFO L225 Difference]: With dead ends: 363 [2021-11-21 00:39:27,433 INFO L226 Difference]: Without dead ends: 265 [2021-11-21 00:39:27,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=535, Invalid=7469, Unknown=6, NotChecked=0, Total=8010 [2021-11-21 00:39:27,437 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 104 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:27,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 985 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 708 Invalid, 0 Unknown, 290 Unchecked, 0.6s Time] [2021-11-21 00:39:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-21 00:39:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 207. [2021-11-21 00:39:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 139 states have internal predecessors, (150), 48 states have call successors, (48), 21 states have call predecessors, (48), 26 states have return successors, (59), 46 states have call predecessors, (59), 47 states have call successors, (59) [2021-11-21 00:39:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2021-11-21 00:39:27,508 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 65 [2021-11-21 00:39:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:27,509 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2021-11-21 00:39:27,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-21 00:39:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2021-11-21 00:39:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:39:27,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:27,511 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:27,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:27,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:27,735 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash 418573970, now seen corresponding path program 1 times [2021-11-21 00:39:27,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:27,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078037238] [2021-11-21 00:39:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:27,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:39:28,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078037238] [2021-11-21 00:39:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078037238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011199517] [2021-11-21 00:39:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:28,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:28,304 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:28,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab347c0f-5ffc-4069-a474-e4bba02f93e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:39:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-21 00:39:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:28,587 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:39:28,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-21 00:39:28,610 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 00:39:28,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-21 00:39:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:47,937 INFO L328 TraceCheckSpWp]: Computing backward predicates...