./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_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_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/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_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/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_5b554e3b-2b5c-499b-93db-4d766682cf42/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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:45:51,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:45:51,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:45:51,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:45:51,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:45:51,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:45:51,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:45:51,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:45:51,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:45:51,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:45:51,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:45:51,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:45:51,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:45:51,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:45:51,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:45:51,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:45:51,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:45:51,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:45:51,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:45:51,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:45:51,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:45:51,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:45:51,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:45:51,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:45:51,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:45:51,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:45:51,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:45:51,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:45:51,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:45:51,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:45:51,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:45:51,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:45:51,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:45:51,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:45:51,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:45:51,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:45:51,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:45:51,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:45:51,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:45:51,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:45:51,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:45:51,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 22:45:51,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:45:51,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:45:51,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:45:51,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:45:51,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:45:51,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:45:51,201 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:45:51,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:45:51,202 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:45:51,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:45:51,202 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:45:51,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:45:51,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:45:51,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:45:51,203 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:45:51,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:45:51,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:45:51,203 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:45:51,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:45:51,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:45:51,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:45:51,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:45:51,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:45:51,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:45:51,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:45:51,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:45:51,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:45:51,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:45:51,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:45:51,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:45:51,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:45:51,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:45:51,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:45:51,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:45:51,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:45:51,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:45:51,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:45:51,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:45:51,208 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_5b554e3b-2b5c-499b-93db-4d766682cf42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-20 22:45:51,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:45:51,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:45:51,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:45:51,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:45:51,529 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:45:51,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-20 22:45:51,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/data/b18886f35/91b3965ac9ad4a999391b622bf3daea7/FLAG87a4574b2 [2021-11-20 22:45:52,385 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:45:52,386 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-20 22:45:52,437 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/data/b18886f35/91b3965ac9ad4a999391b622bf3daea7/FLAG87a4574b2 [2021-11-20 22:45:52,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/data/b18886f35/91b3965ac9ad4a999391b622bf3daea7 [2021-11-20 22:45:52,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:45:52,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:45:52,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:45:52,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:45:52,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:45:52,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:45:52" (1/1) ... [2021-11-20 22:45:52,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dfdd62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:52, skipping insertion in model container [2021-11-20 22:45:52,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:45:52" (1/1) ... [2021-11-20 22:45:52,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:45:52,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:45:52,923 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_5b554e3b-2b5c-499b-93db-4d766682cf42/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-20 22:45:52,930 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_5b554e3b-2b5c-499b-93db-4d766682cf42/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-20 22:45:53,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,749 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,750 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,751 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,763 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,764 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,766 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,767 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,770 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:53,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,126 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 22:45:54,128 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 22:45:54,129 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 22:45:54,130 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 22:45:54,132 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 22:45:54,132 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 22:45:54,133 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 22:45:54,134 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 22:45:54,134 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 22:45:54,135 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 22:45:54,268 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 22:45:54,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:45:54,308 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:45:54,322 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_5b554e3b-2b5c-499b-93db-4d766682cf42/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-20 22:45:54,322 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_5b554e3b-2b5c-499b-93db-4d766682cf42/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-20 22:45:54,360 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,361 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,361 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,362 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,387 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,388 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,390 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,416 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:45:54,460 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 22:45:54,462 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 22:45:54,463 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 22:45:54,463 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 22:45:54,469 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 22:45:54,470 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 22:45:54,470 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 22:45:54,471 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 22:45:54,472 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 22:45:54,473 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 22:45:54,518 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 22:45:54,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:45:54,807 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:45:54,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54 WrapperNode [2021-11-20 22:45:54,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:45:54,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:45:54,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:45:54,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:45:54,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:54,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,005 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-11-20 22:45:55,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:45:55,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:45:55,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:45:55,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:45:55,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:45:55,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:45:55,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:45:55,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:45:55,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (1/1) ... [2021-11-20 22:45:55,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:45:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:55,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:45:55,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:45:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:45:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 22:45:55,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 22:45:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-20 22:45:55,180 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-20 22:45:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:45:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-20 22:45:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-20 22:45:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:45:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:45:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:45:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:45:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 22:45:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 22:45:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:45:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:45:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:45:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 22:45:55,182 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 22:45:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:45:55,437 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:45:55,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:45:55,666 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:45:55,780 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:45:55,781 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 22:45:55,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:45:55 BoogieIcfgContainer [2021-11-20 22:45:55,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:45:55,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:45:55,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:45:55,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:45:55,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:45:52" (1/3) ... [2021-11-20 22:45:55,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23441ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:45:55, skipping insertion in model container [2021-11-20 22:45:55,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:45:54" (2/3) ... [2021-11-20 22:45:55,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23441ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:45:55, skipping insertion in model container [2021-11-20 22:45:55,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:45:55" (3/3) ... [2021-11-20 22:45:55,796 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2021-11-20 22:45:55,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:45:55,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:45:55,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:45:55,865 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:45:55,865 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:45:55,882 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) [2021-11-20 22:45:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 22:45:55,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:55,889 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] [2021-11-20 22:45:55,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:45:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1338419167, now seen corresponding path program 1 times [2021-11-20 22:45:55,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4894746] [2021-11-20 22:45:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:55,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:45:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:45:56,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:45:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4894746] [2021-11-20 22:45:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4894746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:45:56,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668621924] [2021-11-20 22:45:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:56,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:45:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:45:56,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:45:56,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:45:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:45:56,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 22:45:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:45:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,008 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 [2021-11-20 22:45:57,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:45:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,156 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 [2021-11-20 22:45:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:45:57,181 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 [2021-11-20 22:45:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:45:59,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:45:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668621924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:45:59,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:45:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-20 22:45:59,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783654194] [2021-11-20 22:45:59,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:45:59,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:45:59,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:45:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:45:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:45:59,362 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 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 22:45:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:45:59,686 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2021-11-20 22:45:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:45:59,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2021-11-20 22:45:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:45:59,697 INFO L225 Difference]: With dead ends: 101 [2021-11-20 22:45:59,697 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 22:45:59,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:45:59,705 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 18 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:45:59,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 245 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 66 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2021-11-20 22:45:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 22:45:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2021-11-20 22:45:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 22:45:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-11-20 22:45:59,753 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 37 [2021-11-20 22:45:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:45:59,753 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-11-20 22:45:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 22:45:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-11-20 22:45:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 22:45:59,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:45:59,757 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] [2021-11-20 22:45:59,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:45:59,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 22:45:59,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:45:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:45:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2113362132, now seen corresponding path program 1 times [2021-11-20 22:45:59,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:45:59,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376540302] [2021-11-20 22:45:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:45:59,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 22:46:00,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376540302] [2021-11-20 22:46:00,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376540302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455730348] [2021-11-20 22:46:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:00,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:00,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:00,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:46:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 22:46:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,473 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 [2021-11-20 22:46:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,515 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 [2021-11-20 22:46:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,607 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 46 treesize of output 39 [2021-11-20 22:46:00,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:00,635 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 46 treesize of output 39 [2021-11-20 22:46:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:00,814 INFO L354 Elim1Store]: treesize reduction 136, result has 22.7 percent of original size [2021-11-20 22:46:00,814 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 181 treesize of output 135 [2021-11-20 22:46:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:00,914 INFO L354 Elim1Store]: treesize reduction 206, result has 22.0 percent of original size [2021-11-20 22:46:00,914 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 4 new quantified variables, introduced 8 case distinctions, treesize of input 174 treesize of output 157 [2021-11-20 22:46:04,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:04,818 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-11-20 22:46:04,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 14 new quantified variables, introduced 92 case distinctions, treesize of input 325 treesize of output 205 [2021-11-20 22:46:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:04,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:04,885 INFO L354 Elim1Store]: treesize reduction 328, result has 0.3 percent of original size [2021-11-20 22:46:04,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 14 new quantified variables, introduced 92 case distinctions, treesize of input 161 treesize of output 89 [2021-11-20 22:46:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:46:04,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:11,679 WARN L838 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0))) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 16)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 8)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (let ((.cse3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse4 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse4) 0)) (not (= 0 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse4)))))) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 8)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 16)) 0)) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (let ((.cse9 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (or (not (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0)) (not (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (store .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse10 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse9 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0)))))) is different from false [2021-11-20 22:46:13,938 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (and (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0))) (forall ((v_subst_1 Int)) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_1))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 16)) 0)) (forall ((v_subst_5 Int)) (= (select (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 8)) 0)) (forall ((v_subst_6 Int)) (= (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 16)) 0)) (forall ((v_subst_4 Int)) (let ((.cse7 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (or (not (= (select (select (let ((.cse6 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0)) (not (= (select (select (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 v_subst_4))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))))) (forall ((v_subst_3 Int)) (let ((.cse12 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse14 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse11 (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store .cse13 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse13 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse12 v_subst_3))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse14) 0)) (not (= (select (select (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse14) 0))))) (forall ((v_subst_2 Int)) (= 0 (select (select (let ((.cse17 (let ((.cse18 (store |c_#memory_$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| 0)))) (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|) 8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_2 (+ |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_2))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 8))))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) is different from false [2021-11-20 22:46:14,092 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 22:46:14,093 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 255301 treesize of output 254433 [2021-11-20 22:46:34,976 WARN L227 SmtUtils]: Spent 20.88s on a formula simplification. DAG size of input: 794 DAG size of output: 794 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:46:35,103 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 22:46:35,107 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 1214997 treesize of output 1211825 [2021-11-20 22:47:48,249 WARN L227 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 1823 DAG size of output: 1818 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:47:48,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 22:47:48,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462228517] [2021-11-20 22:47:48,299 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-20 22:47:48,299 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:47:48,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:47:48,309 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:47:48,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:47:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:48,488 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:47:48,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:47:48,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:48,667 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:47:48,668 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 [2021-11-20 22:47:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,097 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 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-20 22:47:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,175 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 [2021-11-20 22:47:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,338 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 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:47:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,485 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 [2021-11-20 22:47:51,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:51,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:51,712 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:47:51,713 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 [2021-11-20 22:47:51,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,868 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-20 22:47:51,869 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 [2021-11-20 22:47:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,066 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-20 22:47:52,066 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 [2021-11-20 22:47:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,140 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 [2021-11-20 22:47:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,187 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 [2021-11-20 22:47:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:52,294 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 [2021-11-20 22:47:52,387 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:47:52,390 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:47:52,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:52,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:52,818 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-20 22:47:52,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2021-11-20 22:47:53,164 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-20 22:47:53,165 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 485 treesize of output 575 [2021-11-20 22:47:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:47:53,448 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-20 22:47:53,449 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 569 treesize of output 591 [2021-11-20 22:47:53,725 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-20 22:47:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 636 treesize of output 717 [2021-11-20 22:47:53,817 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-20 22:47:53,818 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 [2021-11-20 22:47:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:53,856 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 [2021-11-20 22:47:53,966 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:47:53,967 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 673 treesize of output 621 [2021-11-20 22:48:05,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:48:05,174 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:48:05,174 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 [2021-11-20 22:48:05,214 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-20 22:48:05,214 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 [2021-11-20 22:48:05,240 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:48:05,241 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 [2021-11-20 22:48:05,264 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:48:05,265 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 [2021-11-20 22:48:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:48:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:05,334 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 [2021-11-20 22:48:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:05,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:48:05,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:05,400 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 [2021-11-20 22:48:05,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:05,440 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 [2021-11-20 22:48:07,562 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-20 22:48:08,875 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 32 for LOIs [2021-11-20 22:48:08,920 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:48:09,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:48:10,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1462228517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:10,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:48:10,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2021-11-20 22:48:10,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961894191] [2021-11-20 22:48:10,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:10,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:48:10,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:48:10,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=727, Unknown=2, NotChecked=110, Total=930 [2021-11-20 22:48:10,729 INFO L87 Difference]: Start difference. First operand 47 states and 62 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) [2021-11-20 22:48:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:10,842 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2021-11-20 22:48:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:48:10,842 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 [2021-11-20 22:48:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:10,845 INFO L225 Difference]: With dead ends: 87 [2021-11-20 22:48:10,845 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 22:48:10,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=91, Invalid=727, Unknown=2, NotChecked=110, Total=930 [2021-11-20 22:48:10,847 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:10,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 246 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-11-20 22:48:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 22:48:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-11-20 22:48:10,859 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) [2021-11-20 22:48:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-11-20 22:48:10,861 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2021-11-20 22:48:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:10,861 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-11-20 22:48:10,862 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) [2021-11-20 22:48:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-11-20 22:48:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 22:48:10,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:10,863 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] [2021-11-20 22:48:10,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:11,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:11,073 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash -303925925, now seen corresponding path program 1 times [2021-11-20 22:48:11,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:11,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169331800] [2021-11-20 22:48:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:11,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:48:11,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169331800] [2021-11-20 22:48:11,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169331800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858878457] [2021-11-20 22:48:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:11,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:11,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:11,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:48:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:48:11,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:48:11,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:48:11,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858878457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:11,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:48:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-20 22:48:11,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313648544] [2021-11-20 22:48:11,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:11,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:48:11,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:11,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:48:11,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:48:11,417 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) [2021-11-20 22:48:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:11,544 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2021-11-20 22:48:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:48:11,545 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 [2021-11-20 22:48:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:11,546 INFO L225 Difference]: With dead ends: 86 [2021-11-20 22:48:11,546 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 22:48:11,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:48:11,548 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 [2021-11-20 22:48:11,548 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] [2021-11-20 22:48:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 22:48:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-20 22:48:11,564 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) [2021-11-20 22:48:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-11-20 22:48:11,570 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2021-11-20 22:48:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:11,570 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-11-20 22:48:11,570 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) [2021-11-20 22:48:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-11-20 22:48:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 22:48:11,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:11,574 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] [2021-11-20 22:48:11,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:11,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:11,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:11,789 INFO L85 PathProgramCache]: Analyzing trace with hash 840951937, now seen corresponding path program 1 times [2021-11-20 22:48:11,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:11,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751959532] [2021-11-20 22:48:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:11,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:48:11,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:11,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751959532] [2021-11-20 22:48:11,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751959532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:11,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426426936] [2021-11-20 22:48:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:11,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:11,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:11,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:11,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:48:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:48:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:48:12,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:48:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426426936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:12,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:48:12,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-20 22:48:12,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435763982] [2021-11-20 22:48:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:48:12,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:48:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:48:12,160 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) [2021-11-20 22:48:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:12,365 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2021-11-20 22:48:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:48:12,366 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 [2021-11-20 22:48:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:12,368 INFO L225 Difference]: With dead ends: 103 [2021-11-20 22:48:12,369 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 22:48:12,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-20 22:48:12,374 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:12,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:48:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 22:48:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-11-20 22:48:12,399 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) [2021-11-20 22:48:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2021-11-20 22:48:12,403 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2021-11-20 22:48:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:12,403 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2021-11-20 22:48:12,405 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) [2021-11-20 22:48:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2021-11-20 22:48:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 22:48:12,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:12,412 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] [2021-11-20 22:48:12,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-20 22:48:12,628 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1878159694, now seen corresponding path program 1 times [2021-11-20 22:48:12,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522158449] [2021-11-20 22:48:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:48:12,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522158449] [2021-11-20 22:48:12,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522158449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490737276] [2021-11-20 22:48:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:12,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:12,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:12,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:12,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:48:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:48:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:48:12,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:48:12,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490737276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:12,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:48:12,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-20 22:48:12,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934308241] [2021-11-20 22:48:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:12,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:12,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:48:12,965 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) [2021-11-20 22:48:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:13,009 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2021-11-20 22:48:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:13,010 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 [2021-11-20 22:48:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:13,011 INFO L225 Difference]: With dead ends: 104 [2021-11-20 22:48:13,011 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 22:48:13,012 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 [2021-11-20 22:48:13,013 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:13,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:48:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 22:48:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-11-20 22:48:13,024 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) [2021-11-20 22:48:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-20 22:48:13,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2021-11-20 22:48:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:13,026 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-20 22:48:13,026 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) [2021-11-20 22:48:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-20 22:48:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 22:48:13,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:13,028 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] [2021-11-20 22:48:13,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:13,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:13,241 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:13,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628998, now seen corresponding path program 1 times [2021-11-20 22:48:13,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:13,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120674622] [2021-11-20 22:48:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:13,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:48:13,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120674622] [2021-11-20 22:48:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120674622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581151824] [2021-11-20 22:48:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:13,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:13,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:13,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:48:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 22:48:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:13,567 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 [2021-11-20 22:48:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:13,575 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 [2021-11-20 22:48:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 22:48:20,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 22:48:25,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581151824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:48:25,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585979746] [2021-11-20 22:48:25,559 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-20 22:48:25,559 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:25,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:25,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:25,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:48:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:25,686 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:48:25,687 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 [2021-11-20 22:48:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:25,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-20 22:48:27,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:48:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,738 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 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:48:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,790 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 [2021-11-20 22:48:27,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:27,899 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 [2021-11-20 22:48:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,068 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 [2021-11-20 22:48:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,102 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 [2021-11-20 22:48:28,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,280 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 [2021-11-20 22:48:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:28,373 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 [2021-11-20 22:48:32,899 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 124 for LOIs [2021-11-20 22:48:36,300 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-20 22:48:36,345 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:48:36,430 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 124 for LOIs [2021-11-20 22:48:36,747 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:48:40,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [585979746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:40,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:48:40,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 16, 8] total 41 [2021-11-20 22:48:40,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190381496] [2021-11-20 22:48:40,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:40,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 22:48:40,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 22:48:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:48:40,641 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) [2021-11-20 22:48:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:41,466 INFO L93 Difference]: Finished difference Result 122 states and 172 transitions. [2021-11-20 22:48:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 22:48:41,466 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 [2021-11-20 22:48:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:41,468 INFO L225 Difference]: With dead ends: 122 [2021-11-20 22:48:41,468 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 22:48:41,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:48:41,471 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:41,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 317 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 357 Invalid, 0 Unknown, 27 Unchecked, 0.8s Time] [2021-11-20 22:48:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 22:48:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-11-20 22:48:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-20 22:48:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-11-20 22:48:41,491 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 45 [2021-11-20 22:48:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:41,491 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-11-20 22:48:41,492 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) [2021-11-20 22:48:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-11-20 22:48:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 22:48:41,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:41,493 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] [2021-11-20 22:48:41,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:41,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:41,709 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:41,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1964135121, now seen corresponding path program 1 times [2021-11-20 22:48:41,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:41,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579056405] [2021-11-20 22:48:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:41,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 22:48:41,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579056405] [2021-11-20 22:48:41,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579056405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:41,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407748591] [2021-11-20 22:48:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:41,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:41,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:41,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:41,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:48:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 22:48:41,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:48:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:42,214 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-20 22:48:42,214 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 [2021-11-20 22:48:42,238 INFO L354 Elim1Store]: treesize reduction 47, result has 24.2 percent of original size [2021-11-20 22:48:42,238 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 [2021-11-20 22:48:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:55,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:48:59,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407748591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:48:59,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660662007] [2021-11-20 22:48:59,844 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-20 22:48:59,844 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:59,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:59,845 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:59,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:48:59,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:59,955 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:48:59,955 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 [2021-11-20 22:49:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:00,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-20 22:49:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,663 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 [2021-11-20 22:49:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,795 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 [2021-11-20 22:49:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,855 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 [2021-11-20 22:49:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:01,900 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 [2021-11-20 22:49:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,069 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 [2021-11-20 22:49:02,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,097 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 [2021-11-20 22:49:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,223 INFO L354 Elim1Store]: treesize reduction 122, result has 27.4 percent of original size [2021-11-20 22:49:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 47 treesize of output 85 [2021-11-20 22:49:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,351 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 22:49:02,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 91 treesize of output 99 [2021-11-20 22:49:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,491 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 [2021-11-20 22:49:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,633 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 22:49:02,633 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 [2021-11-20 22:49:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:02,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:03,380 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-20 22:49:03,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 732 treesize of output 741 [2021-11-20 22:49:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:03,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:49:03,949 INFO L354 Elim1Store]: treesize reduction 603, result has 18.0 percent of original size [2021-11-20 22:49:03,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 823 treesize of output 832 [2021-11-20 22:49:04,004 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-20 22:49:04,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 926 treesize of output 879 [2021-11-20 22:49:04,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:04,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 881 treesize of output 860 [2021-11-20 22:49:04,169 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-20 22:49:04,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 862 treesize of output 874 [2021-11-20 22:49:04,360 INFO L354 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2021-11-20 22:49:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 868 treesize of output 887 [2021-11-20 22:49:04,417 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:49:04,417 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 884 treesize of output 832 [2021-11-20 22:49:11,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:49:11,572 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:49:11,573 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 [2021-11-20 22:49:11,598 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:49:11,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-20 22:49:11,628 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:49:11,628 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 [2021-11-20 22:49:11,655 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:49:11,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-20 22:49:11,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:11,807 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 [2021-11-20 22:49:11,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:11,838 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 [2021-11-20 22:49:11,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:11,874 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 [2021-11-20 22:49:11,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:12,004 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 [2021-11-20 22:49:14,571 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-20 22:49:17,892 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-20 22:49:17,924 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:49:18,012 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 80 for LOIs [2021-11-20 22:49:18,333 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:49:21,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [660662007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:21,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:49:21,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 17, 8] total 45 [2021-11-20 22:49:21,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172071282] [2021-11-20 22:49:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:21,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 22:49:21,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 22:49:21,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 22:49:21,102 INFO L87 Difference]: Start difference. First operand 66 states and 84 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) [2021-11-20 22:49:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:21,953 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2021-11-20 22:49:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 22:49:21,954 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 [2021-11-20 22:49:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:21,955 INFO L225 Difference]: With dead ends: 120 [2021-11-20 22:49:21,955 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 22:49:21,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 22:49:21,956 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:21,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 203 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 240 Invalid, 0 Unknown, 172 Unchecked, 0.4s Time] [2021-11-20 22:49:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 22:49:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-11-20 22:49:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.255813953488372) internal successors, (54), 45 states have internal predecessors, (54), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-20 22:49:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2021-11-20 22:49:21,977 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 46 [2021-11-20 22:49:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:21,978 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2021-11-20 22:49:21,978 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) [2021-11-20 22:49:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2021-11-20 22:49:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 22:49:21,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:21,980 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] [2021-11-20 22:49:22,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:22,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:49:22,189 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:49:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash -850872160, now seen corresponding path program 1 times [2021-11-20 22:49:22,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:22,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586804475] [2021-11-20 22:49:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:22,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:49:22,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:22,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586804475] [2021-11-20 22:49:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586804475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:49:22,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272740250] [2021-11-20 22:49:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:22,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:49:22,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:22,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:49:22,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 22:49:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 22:49:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:22,572 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 [2021-11-20 22:49:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:49:22,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:23,190 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 [2021-11-20 22:49:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 22:49:23,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272740250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:49:23,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111606056] [2021-11-20 22:49:23,362 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 22:49:23,362 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:49:23,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:49:23,363 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:49:23,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:49:23,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:23,472 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:49:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:49:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:23,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:23,603 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:49:23,603 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 [2021-11-20 22:49:25,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,349 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 [2021-11-20 22:49:25,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,412 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 [2021-11-20 22:49:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,539 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 [2021-11-20 22:49:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,708 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 [2021-11-20 22:49:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,788 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 [2021-11-20 22:49:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,899 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 [2021-11-20 22:49:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:25,944 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 [2021-11-20 22:49:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:26,226 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 [2021-11-20 22:49:30,515 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 124 for LOIs [2021-11-20 22:49:36,104 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-20 22:49:36,123 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:49:36,239 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 124 for LOIs [2021-11-20 22:49:36,627 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:49:41,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2111606056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:41,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:49:41,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [8, 11, 10] total 41 [2021-11-20 22:49:41,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729274082] [2021-11-20 22:49:41,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:41,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 22:49:41,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 22:49:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:49:41,713 INFO L87 Difference]: Start difference. First operand 68 states and 88 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) [2021-11-20 22:49:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:42,401 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2021-11-20 22:49:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 22:49:42,402 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 [2021-11-20 22:49:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:42,404 INFO L225 Difference]: With dead ends: 144 [2021-11-20 22:49:42,404 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 22:49:42,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:49:42,406 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:42,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 299 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 327 Invalid, 0 Unknown, 23 Unchecked, 0.7s Time] [2021-11-20 22:49:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 22:49:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2021-11-20 22:49:42,436 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) [2021-11-20 22:49:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2021-11-20 22:49:42,437 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 47 [2021-11-20 22:49:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:42,438 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2021-11-20 22:49:42,438 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) [2021-11-20 22:49:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2021-11-20 22:49:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:49:42,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:42,439 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] [2021-11-20 22:49:42,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:42,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 22:49:42,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:49:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1509868147, now seen corresponding path program 1 times [2021-11-20 22:49:42,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:49:42,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974495303] [2021-11-20 22:49:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:42,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:49:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 22:49:42,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:49:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974495303] [2021-11-20 22:49:42,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974495303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:49:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742898185] [2021-11-20 22:49:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:42,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:49:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:42,760 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:49:42,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 22:49:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 22:49:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:43,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:49:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:43,014 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 [2021-11-20 22:49:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 22:49:48,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 22:49:53,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742898185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:49:53,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162707512] [2021-11-20 22:49:53,132 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 22:49:53,132 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:49:53,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:49:53,133 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:49:53,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:49:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:53,229 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:49:53,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:49:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:53,329 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:49:53,330 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 [2021-11-20 22:49:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:54,920 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 [2021-11-20 22:49:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,026 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 [2021-11-20 22:49:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,108 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 [2021-11-20 22:49:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,232 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 [2021-11-20 22:49:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,339 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 [2021-11-20 22:49:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,385 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 [2021-11-20 22:49:55,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,578 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 [2021-11-20 22:49:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:55,659 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 [2021-11-20 22:50:06,437 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-20 22:50:07,342 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 20 for LOIs [2021-11-20 22:50:12,021 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-20 22:50:12,041 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:50:12,135 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-20 22:50:12,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:19,956 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:50:19,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:50:19,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2021-11-20 22:50:19,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418180766] [2021-11-20 22:50:19,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:19,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 22:50:19,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 22:50:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 22:50:19,960 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 22:50:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:23,156 INFO L93 Difference]: Finished difference Result 293 states and 472 transitions. [2021-11-20 22:50:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 22:50:23,157 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 48 [2021-11-20 22:50:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:23,162 INFO L225 Difference]: With dead ends: 293 [2021-11-20 22:50:23,162 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 22:50:23,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=519, Invalid=4737, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 22:50:23,165 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 72 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:23,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 900 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1651 Invalid, 0 Unknown, 194 Unchecked, 1.9s Time] [2021-11-20 22:50:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 22:50:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 172. [2021-11-20 22:50:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 112 states have internal predecessors, (127), 46 states have call successors, (46), 15 states have call predecessors, (46), 20 states have return successors, (100), 44 states have call predecessors, (100), 45 states have call successors, (100) [2021-11-20 22:50:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 273 transitions. [2021-11-20 22:50:23,236 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 273 transitions. Word has length 48 [2021-11-20 22:50:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:23,237 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 273 transitions. [2021-11-20 22:50:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-20 22:50:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 273 transitions. [2021-11-20 22:50:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 22:50:23,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:23,239 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, 1, 1] [2021-11-20 22:50:23,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:23,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 22:50:23,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 409314457, now seen corresponding path program 1 times [2021-11-20 22:50:23,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595460809] [2021-11-20 22:50:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:23,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 22:50:23,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595460809] [2021-11-20 22:50:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595460809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770178091] [2021-11-20 22:50:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:23,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:23,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:23,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:50:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:50:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 22:50:23,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:23,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770178091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:23,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:23,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-20 22:50:23,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718530521] [2021-11-20 22:50:23,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:23,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:50:23,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:50:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:50:23,880 INFO L87 Difference]: Start difference. First operand 172 states and 273 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 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) [2021-11-20 22:50:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:24,056 INFO L93 Difference]: Finished difference Result 269 states and 417 transitions. [2021-11-20 22:50:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:24,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 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 50 [2021-11-20 22:50:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:24,059 INFO L225 Difference]: With dead ends: 269 [2021-11-20 22:50:24,059 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 22:50:24,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 22:50:24,061 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 174 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 22:50:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-20 22:50:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 109 states have internal predecessors, (122), 46 states have call successors, (46), 15 states have call predecessors, (46), 19 states have return successors, (89), 44 states have call predecessors, (89), 45 states have call successors, (89) [2021-11-20 22:50:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 257 transitions. [2021-11-20 22:50:24,116 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 257 transitions. Word has length 50 [2021-11-20 22:50:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:24,116 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 257 transitions. [2021-11-20 22:50:24,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 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) [2021-11-20 22:50:24,117 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 257 transitions. [2021-11-20 22:50:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 22:50:24,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:24,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:24,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:24,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:24,340 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:24,341 INFO L85 PathProgramCache]: Analyzing trace with hash -563957517, now seen corresponding path program 1 times [2021-11-20 22:50:24,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:24,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714566998] [2021-11-20 22:50:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:24,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 22:50:24,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714566998] [2021-11-20 22:50:24,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714566998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111222354] [2021-11-20 22:50:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:24,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:24,503 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:24,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 22:50:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 22:50:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 22:50:24,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:24,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111222354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:24,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:24,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-20 22:50:24,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100849089] [2021-11-20 22:50:24,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:24,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:50:24,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:50:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:50:24,798 INFO L87 Difference]: Start difference. First operand 169 states and 257 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-11-20 22:50:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:25,029 INFO L93 Difference]: Finished difference Result 302 states and 457 transitions. [2021-11-20 22:50:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:50:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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 [2021-11-20 22:50:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:25,033 INFO L225 Difference]: With dead ends: 302 [2021-11-20 22:50:25,033 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 22:50:25,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-20 22:50:25,035 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:25,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 202 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 22:50:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-11-20 22:50:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 106 states have internal predecessors, (118), 47 states have call successors, (47), 15 states have call predecessors, (47), 18 states have return successors, (79), 45 states have call predecessors, (79), 46 states have call successors, (79) [2021-11-20 22:50:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2021-11-20 22:50:25,097 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 52 [2021-11-20 22:50:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:25,097 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2021-11-20 22:50:25,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-11-20 22:50:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2021-11-20 22:50:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 22:50:25,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:25,099 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] [2021-11-20 22:50:25,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:25,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:25,312 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:25,313 INFO L85 PathProgramCache]: Analyzing trace with hash 239093914, now seen corresponding path program 1 times [2021-11-20 22:50:25,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:25,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422440560] [2021-11-20 22:50:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:25,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:50:25,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422440560] [2021-11-20 22:50:25,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422440560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015401386] [2021-11-20 22:50:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:25,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:25,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:25,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:25,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 22:50:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-20 22:50:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:25,775 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 [2021-11-20 22:50:25,822 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-20 22:50:25,823 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 102 treesize of output 89 [2021-11-20 22:50:25,860 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-20 22:50:25,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 70 [2021-11-20 22:50:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:50:27,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:50:32,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015401386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:32,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519035257] [2021-11-20 22:50:32,795 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 22:50:32,795 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:32,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:32,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:32,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,913 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:50:32,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:50:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,029 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:50:33,029 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 [2021-11-20 22:50:34,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:34,827 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 [2021-11-20 22:50:34,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:34,940 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 [2021-11-20 22:50:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,042 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 [2021-11-20 22:50:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,138 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 [2021-11-20 22:50:35,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,251 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:50:35,251 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 [2021-11-20 22:50:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,378 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-20 22:50:35,379 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 [2021-11-20 22:50:35,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:50:35,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,578 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-20 22:50:35,578 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 [2021-11-20 22:50:35,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,663 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 [2021-11-20 22:50:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,752 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 [2021-11-20 22:50:35,774 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:50:35,775 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:50:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:36,078 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-20 22:50:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2021-11-20 22:50:36,355 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-20 22:50:36,356 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 [2021-11-20 22:50:36,427 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-20 22:50:36,428 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 584 treesize of output 567 [2021-11-20 22:50:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 564 treesize of output 551 [2021-11-20 22:50:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:36,722 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-20 22:50:36,722 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 545 treesize of output 561 [2021-11-20 22:50:37,049 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-20 22:50:37,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 582 treesize of output 672 [2021-11-20 22:50:37,112 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:50:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 673 treesize of output 621 [2021-11-20 22:50:47,176 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:50:47,177 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 133 treesize of output 120 [2021-11-20 22:50:47,209 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-20 22:50:47,209 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 [2021-11-20 22:50:47,234 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:50:47,234 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 [2021-11-20 22:50:47,304 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:50:47,304 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 [2021-11-20 22:50:47,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:47,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:50:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:47,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:50:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:47,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 22:50:47,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:47,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:47,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-20 22:50:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:47,581 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 [2021-11-20 22:50:50,573 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-20 22:50:56,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-20 22:50:56,650 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:50:56,738 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-20 22:50:57,227 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1519035257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:00,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:00,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 17, 17] total 58 [2021-11-20 22:51:00,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945760293] [2021-11-20 22:51:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:00,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 22:51:00,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 22:51:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3078, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 22:51:00,486 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 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) [2021-11-20 22:51:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:01,940 INFO L93 Difference]: Finished difference Result 262 states and 364 transitions. [2021-11-20 22:51:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 22:51:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 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 56 [2021-11-20 22:51:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:01,945 INFO L225 Difference]: With dead ends: 262 [2021-11-20 22:51:01,945 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 22:51:01,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 22:51:01,948 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:01,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 205 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 348 Invalid, 0 Unknown, 188 Unchecked, 0.5s Time] [2021-11-20 22:51:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 22:51:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2021-11-20 22:51:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 128 states have internal predecessors, (140), 49 states have call successors, (49), 17 states have call predecessors, (49), 23 states have return successors, (80), 47 states have call predecessors, (80), 48 states have call successors, (80) [2021-11-20 22:51:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 269 transitions. [2021-11-20 22:51:02,009 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 269 transitions. Word has length 56 [2021-11-20 22:51:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:02,010 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 269 transitions. [2021-11-20 22:51:02,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 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) [2021-11-20 22:51:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 269 transitions. [2021-11-20 22:51:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 22:51:02,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:02,012 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] [2021-11-20 22:51:02,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:02,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:02,233 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash 42564708, now seen corresponding path program 1 times [2021-11-20 22:51:02,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:02,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132763016] [2021-11-20 22:51:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:02,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 22:51:02,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:02,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132763016] [2021-11-20 22:51:02,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132763016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:02,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879950990] [2021-11-20 22:51:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:02,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:02,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:02,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 22:51:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 22:51:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 22:51:02,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 22:51:02,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879950990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:02,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833475820] [2021-11-20 22:51:02,892 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 22:51:02,892 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:02,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:02,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:02,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,970 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:51:02,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:51:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,074 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:51:03,075 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 [2021-11-20 22:51:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,769 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 [2021-11-20 22:51:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,811 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 [2021-11-20 22:51:04,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,878 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 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:51:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:04,963 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 [2021-11-20 22:51:05,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:05,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:05,089 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:51:05,089 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 [2021-11-20 22:51:05,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,142 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 [2021-11-20 22:51:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,191 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 [2021-11-20 22:51:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,283 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-20 22:51:05,283 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 [2021-11-20 22:51:05,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,378 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 22:51:05,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 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 [2021-11-20 22:51:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,450 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 [2021-11-20 22:51:05,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:05,636 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:51:05,637 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 [2021-11-20 22:51:05,666 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-20 22:51:05,666 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 [2021-11-20 22:51:05,687 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:51:05,687 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 [2021-11-20 22:51:05,712 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:51:05,712 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 128 treesize of output 76 [2021-11-20 22:51:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:51:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,912 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 [2021-11-20 22:51:05,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:05,975 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 [2021-11-20 22:51:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:06,021 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 [2021-11-20 22:51:06,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:06,075 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 [2021-11-20 22:51:10,869 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2021-11-20 22:51:11,083 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 20 for LOIs [2021-11-20 22:51:15,923 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-20 22:51:15,944 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:51:16,035 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-20 22:51:16,526 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:20,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:20,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:20,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2021-11-20 22:51:20,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025380989] [2021-11-20 22:51:20,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 22:51:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 22:51:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 22:51:20,532 INFO L87 Difference]: Start difference. First operand 193 states and 269 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) [2021-11-20 22:51:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:20,774 INFO L93 Difference]: Finished difference Result 309 states and 457 transitions. [2021-11-20 22:51:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:51:20,781 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 [2021-11-20 22:51:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:20,783 INFO L225 Difference]: With dead ends: 309 [2021-11-20 22:51:20,783 INFO L226 Difference]: Without dead ends: 209 [2021-11-20 22:51:20,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 22:51:20,785 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:20,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 584 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-20 22:51:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2021-11-20 22:51:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 134 states have internal predecessors, (144), 49 states have call successors, (49), 17 states have call predecessors, (49), 25 states have return successors, (85), 47 states have call predecessors, (85), 48 states have call successors, (85) [2021-11-20 22:51:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 278 transitions. [2021-11-20 22:51:20,854 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 278 transitions. Word has length 63 [2021-11-20 22:51:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:20,855 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 278 transitions. [2021-11-20 22:51:20,857 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) [2021-11-20 22:51:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 278 transitions. [2021-11-20 22:51:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 22:51:20,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:20,860 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] [2021-11-20 22:51:20,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:21,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:21,084 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -823148034, now seen corresponding path program 1 times [2021-11-20 22:51:21,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122724322] [2021-11-20 22:51:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:21,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:51:21,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122724322] [2021-11-20 22:51:21,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122724322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339719572] [2021-11-20 22:51:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:21,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:21,194 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:21,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 22:51:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 22:51:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:21,442 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 22:51:21,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 58 [2021-11-20 22:51:21,455 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:51:21,455 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 73 treesize of output 54 [2021-11-20 22:51:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:51:34,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 22:51:35,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339719572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:35,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60245559] [2021-11-20 22:51:35,559 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 22:51:35,559 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:35,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:35,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:35,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:35,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:35,652 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:51:35,653 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 [2021-11-20 22:51:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:35,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-20 22:51:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,507 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 [2021-11-20 22:51:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,540 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 [2021-11-20 22:51:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,756 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 [2021-11-20 22:51:37,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,819 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 [2021-11-20 22:51:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:37,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:37,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:37,923 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:51:37,923 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 [2021-11-20 22:51:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:37,984 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 [2021-11-20 22:51:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:38,067 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:51:38,067 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 [2021-11-20 22:51:38,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,210 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-20 22:51:38,211 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 [2021-11-20 22:51:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:51:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:38,347 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 22:51:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 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 [2021-11-20 22:51:38,478 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:51:38,479 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 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-20 22:51:38,500 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:51:38,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-20 22:51:38,526 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:51:38,527 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 [2021-11-20 22:51:38,549 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:51:38,550 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 [2021-11-20 22:51:38,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:51:38,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:38,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:51:38,873 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:51:38,873 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 [2021-11-20 22:51:38,904 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-20 22:51:38,904 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 [2021-11-20 22:51:38,929 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-20 22:51:38,929 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 [2021-11-20 22:51:38,963 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:51:38,963 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 [2021-11-20 22:51:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:51:39,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:39,125 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 [2021-11-20 22:51:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:39,156 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 [2021-11-20 22:51:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:39,177 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 35 treesize of output 7 [2021-11-20 22:51:44,113 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2021-11-20 22:51:44,289 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 22 for LOIs [2021-11-20 22:51:49,655 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 21 for LOIs [2021-11-20 22:51:49,681 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:51:49,773 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-20 22:51:50,290 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:59,836 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:59,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:59,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 14] total 36 [2021-11-20 22:51:59,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253140607] [2021-11-20 22:51:59,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:59,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 22:51:59,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 22:51:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3725, Unknown=6, NotChecked=0, Total=4032 [2021-11-20 22:51:59,840 INFO L87 Difference]: Start difference. First operand 199 states and 278 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) [2021-11-20 22:52:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:03,464 INFO L93 Difference]: Finished difference Result 415 states and 578 transitions. [2021-11-20 22:52:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 22:52:03,464 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 [2021-11-20 22:52:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:03,468 INFO L225 Difference]: With dead ends: 415 [2021-11-20 22:52:03,468 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 22:52:03,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=504, Invalid=6970, Unknown=8, NotChecked=0, Total=7482 [2021-11-20 22:52:03,472 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 105 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:03,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 844 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 430 Invalid, 0 Unknown, 202 Unchecked, 0.3s Time] [2021-11-20 22:52:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 22:52:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 239. [2021-11-20 22:52:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 53 states have call successors, (53), 24 states have call predecessors, (53), 30 states have return successors, (72), 51 states have call predecessors, (72), 52 states have call successors, (72) [2021-11-20 22:52:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 307 transitions. [2021-11-20 22:52:03,549 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 307 transitions. Word has length 65 [2021-11-20 22:52:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:03,550 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 307 transitions. [2021-11-20 22:52:03,550 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) [2021-11-20 22:52:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 307 transitions. [2021-11-20 22:52:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 22:52:03,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:03,552 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] [2021-11-20 22:52:03,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:03,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 22:52:03,767 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash -277742896, now seen corresponding path program 1 times [2021-11-20 22:52:03,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:03,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276206240] [2021-11-20 22:52:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:03,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 22:52:04,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276206240] [2021-11-20 22:52:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276206240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:52:04,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715038991] [2021-11-20 22:52:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:04,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:04,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:04,312 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:04,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b554e3b-2b5c-499b-93db-4d766682cf42/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 22:52:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-20 22:52:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:04,608 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-20 22:52:04,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 58 [2021-11-20 22:52:04,618 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:52:04,618 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 73 treesize of output 54 [2021-11-20 22:52:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:21,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:46,406 INFO L354 Elim1Store]: treesize reduction 141, result has 15.1 percent of original size [2021-11-20 22:52:46,407 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 2651 treesize of output 2287 [2021-11-20 22:52:46,890 INFO L354 Elim1Store]: treesize reduction 364, result has 28.3 percent of original size [2021-11-20 22:52:46,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 5005 treesize of output 4738 [2021-11-20 22:52:47,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:47,141 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 4496 treesize of output 4066 [2021-11-20 22:58:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-20 22:58:07,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-20 22:58:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 22:58:07,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 22:58:07,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 22:58:08,035 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-11-20 22:58:08,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 213 treesize of output 223 [2021-11-20 22:58:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:58:12,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715038991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:12,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643572112] [2021-11-20 22:58:12,138 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 22:58:12,138 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:58:12,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:58:12,139 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:58:12,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:58:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:12,259 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:58:12,260 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 [2021-11-20 22:58:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:12,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-20 22:58:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,376 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 [2021-11-20 22:58:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,491 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 [2021-11-20 22:58:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,698 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 [2021-11-20 22:58:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:14,802 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 [2021-11-20 22:58:15,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,039 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 [2021-11-20 22:58:15,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,121 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 [2021-11-20 22:58:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,225 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 [2021-11-20 22:58:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:15,327 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