./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS --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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:28:31,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:28:31,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:28:31,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:28:31,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:28:31,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:28:31,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:28:31,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:28:31,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:28:31,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:28:31,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:28:31,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:28:31,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:28:31,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:28:31,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:28:31,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:28:31,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:28:31,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:28:31,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:28:31,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:28:31,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:28:31,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:28:31,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:28:31,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:28:31,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:28:31,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:28:31,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:28:31,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:28:31,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:28:31,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:28:31,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:28:31,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:28:31,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:28:31,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:28:31,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:28:31,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:28:31,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:28:31,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:28:31,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:28:31,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:28:31,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:28:31,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:28:31,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:28:31,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:28:31,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:28:31,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:28:31,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:28:31,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:28:31,239 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:28:31,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:28:31,239 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:28:31,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:28:31,240 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:28:31,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:28:31,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:28:31,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:28:31,241 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:28:31,241 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:28:31,241 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:28:31,242 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:28:31,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:28:31,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:28:31,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:28:31,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:28:31,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:28:31,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:28:31,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:28:31,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:28:31,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:28:31,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:28:31,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:28:31,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:28:31,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:28:31,249 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:28:31,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:28:31,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:28:31,249 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:28:31,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:28:31,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:28:31,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:28:31,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2022-11-19 07:28:31,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:28:31,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:28:31,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:28:31,555 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:28:31,556 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:28:31,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-19 07:28:31,619 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/data/f45e5da1d/d946307007b44383990714f9b9a759d0/FLAG7b13f4ee4 [2022-11-19 07:28:32,324 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:28:32,324 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-19 07:28:32,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/data/f45e5da1d/d946307007b44383990714f9b9a759d0/FLAG7b13f4ee4 [2022-11-19 07:28:32,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/data/f45e5da1d/d946307007b44383990714f9b9a759d0 [2022-11-19 07:28:32,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:28:32,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:28:32,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:28:32,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:28:32,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:28:32,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:28:32" (1/1) ... [2022-11-19 07:28:32,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3a59ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:32, skipping insertion in model container [2022-11-19 07:28:32,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:28:32" (1/1) ... [2022-11-19 07:28:32,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:28:32,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:28:32,886 WARN L234 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_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-19 07:28:32,894 WARN L234 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_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-19 07:28:33,716 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,721 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,721 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,722 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,724 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,746 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,746 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,748 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,748 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,749 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,751 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,751 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:33,752 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,178 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:28:34,180 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:28:34,181 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:28:34,182 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:28:34,184 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:28:34,185 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:28:34,186 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:28:34,186 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:28:34,187 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:28:34,188 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:28:34,338 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:28:34,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:28:34,376 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:28:34,389 WARN L234 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_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-19 07:28:34,390 WARN L234 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_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-19 07:28:34,459 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,460 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,460 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,461 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,462 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,469 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,486 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,487 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,488 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,489 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,490 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,490 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,491 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:28:34,569 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:28:34,571 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:28:34,571 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:28:34,572 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:28:34,573 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:28:34,573 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:28:34,574 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:28:34,574 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:28:34,575 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:28:34,575 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:28:34,613 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:28:34,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:28:34,845 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:28:34,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34 WrapperNode [2022-11-19 07:28:34,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:28:34,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:28:34,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:28:34,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:28:34,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:34,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:34,996 INFO L138 Inliner]: procedures = 679, calls = 1079, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 213 [2022-11-19 07:28:34,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:28:34,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:28:34,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:28:34,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:28:35,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:28:35,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:28:35,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:28:35,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:28:35,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (1/1) ... [2022-11-19 07:28:35,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:28:35,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:35,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:28:35,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:28:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-11-19 07:28:35,145 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-11-19 07:28:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:28:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:28:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:28:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-19 07:28:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-19 07:28:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2022-11-19 07:28:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2022-11-19 07:28:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:28:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-19 07:28:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-19 07:28:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:28:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:28:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:28:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:28:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-19 07:28:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-19 07:28:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:28:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:28:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:28:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:28:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:28:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 07:28:35,149 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 07:28:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:28:35,388 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:28:35,404 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:28:35,907 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:28:36,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:28:36,017 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:28:36,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:28:36 BoogieIcfgContainer [2022-11-19 07:28:36,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:28:36,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:28:36,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:28:36,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:28:36,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:28:32" (1/3) ... [2022-11-19 07:28:36,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f6abb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:28:36, skipping insertion in model container [2022-11-19 07:28:36,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:28:34" (2/3) ... [2022-11-19 07:28:36,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f6abb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:28:36, skipping insertion in model container [2022-11-19 07:28:36,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:28:36" (3/3) ... [2022-11-19 07:28:36,033 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2022-11-19 07:28:36,055 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:28:36,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:28:36,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:28:36,157 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@20bcd010, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:28:36,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:28:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-19 07:28:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:28:36,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:36,174 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:36,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1308370605, now seen corresponding path program 1 times [2022-11-19 07:28:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:36,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312391855] [2022-11-19 07:28:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:28:37,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:37,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312391855] [2022-11-19 07:28:37,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312391855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:37,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218571626] [2022-11-19 07:28:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:37,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:28:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:28:38,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:28:38,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:38,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218571626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:38,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:38,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2022-11-19 07:28:38,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411268815] [2022-11-19 07:28:38,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:38,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:28:38,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:28:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:28:38,305 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:28:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:38,852 INFO L93 Difference]: Finished difference Result 166 states and 254 transitions. [2022-11-19 07:28:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:28:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 62 [2022-11-19 07:28:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:38,866 INFO L225 Difference]: With dead ends: 166 [2022-11-19 07:28:38,867 INFO L226 Difference]: Without dead ends: 87 [2022-11-19 07:28:38,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:28:38,873 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 42 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:38,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 463 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:28:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-19 07:28:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-19 07:28:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-11-19 07:28:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2022-11-19 07:28:38,926 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 62 [2022-11-19 07:28:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:38,927 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2022-11-19 07:28:38,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:28:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2022-11-19 07:28:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:28:38,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:38,930 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:38,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:28:39,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:39,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash -825605775, now seen corresponding path program 1 times [2022-11-19 07:28:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:39,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214590795] [2022-11-19 07:28:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:28:39,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214590795] [2022-11-19 07:28:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214590795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626174630] [2022-11-19 07:28:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:39,682 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:39,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:28:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:28:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:28:40,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:40,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626174630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:40,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:40,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 07:28:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178987970] [2022-11-19 07:28:40,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:40,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:28:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:40,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:28:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:28:40,259 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:28:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:40,728 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2022-11-19 07:28:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:28:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2022-11-19 07:28:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:40,731 INFO L225 Difference]: With dead ends: 163 [2022-11-19 07:28:40,731 INFO L226 Difference]: Without dead ends: 90 [2022-11-19 07:28:40,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:28:40,733 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 64 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:40,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 427 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:28:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-19 07:28:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-19 07:28:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 51 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-19 07:28:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2022-11-19 07:28:40,751 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 64 [2022-11-19 07:28:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:40,752 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2022-11-19 07:28:40,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:28:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2022-11-19 07:28:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:28:40,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:40,754 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:40,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 07:28:40,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2097948773, now seen corresponding path program 1 times [2022-11-19 07:28:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142379213] [2022-11-19 07:28:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:28:41,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142379213] [2022-11-19 07:28:41,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142379213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:41,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435086979] [2022-11-19 07:28:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:41,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:41,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:41,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:28:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:28:41,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:28:42,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:42,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435086979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:42,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:42,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-19 07:28:42,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4596263] [2022-11-19 07:28:42,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:42,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:28:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:28:42,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:28:42,101 INFO L87 Difference]: Start difference. First operand 90 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:28:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:42,627 INFO L93 Difference]: Finished difference Result 178 states and 274 transitions. [2022-11-19 07:28:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:28:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-11-19 07:28:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:42,630 INFO L225 Difference]: With dead ends: 178 [2022-11-19 07:28:42,630 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 07:28:42,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:28:42,632 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 94 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 499 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:28:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 07:28:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2022-11-19 07:28:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 53 states have internal predecessors, (59), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-19 07:28:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 135 transitions. [2022-11-19 07:28:42,653 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 135 transitions. Word has length 66 [2022-11-19 07:28:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:42,658 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 135 transitions. [2022-11-19 07:28:42,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:28:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 135 transitions. [2022-11-19 07:28:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:28:42,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:42,664 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:42,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:42,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:42,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -921720928, now seen corresponding path program 1 times [2022-11-19 07:28:42,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:42,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702549074] [2022-11-19 07:28:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:42,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:28:43,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702549074] [2022-11-19 07:28:43,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702549074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504340185] [2022-11-19 07:28:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:43,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:43,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:43,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:28:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:28:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:28:44,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:44,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504340185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:44,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:44,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-19 07:28:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355800266] [2022-11-19 07:28:44,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:44,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:28:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:28:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:28:44,060 INFO L87 Difference]: Start difference. First operand 92 states and 135 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:28:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:44,127 INFO L93 Difference]: Finished difference Result 179 states and 282 transitions. [2022-11-19 07:28:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:28:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-11-19 07:28:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:44,132 INFO L225 Difference]: With dead ends: 179 [2022-11-19 07:28:44,132 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:28:44,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:28:44,135 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:44,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:28:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:28:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2022-11-19 07:28:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-19 07:28:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2022-11-19 07:28:44,169 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 67 [2022-11-19 07:28:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:44,170 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2022-11-19 07:28:44,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:28:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2022-11-19 07:28:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:28:44,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:44,175 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:44,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:44,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:44,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1389593974, now seen corresponding path program 1 times [2022-11-19 07:28:44,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:44,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449444097] [2022-11-19 07:28:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:44,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:28:44,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:44,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449444097] [2022-11-19 07:28:44,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449444097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:44,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650921889] [2022-11-19 07:28:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:44,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:44,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:44,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:44,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:28:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:28:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:28:45,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:45,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650921889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:45,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:45,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 10 [2022-11-19 07:28:45,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009252391] [2022-11-19 07:28:45,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:45,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:28:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:45,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:28:45,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:28:45,657 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:28:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:46,185 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2022-11-19 07:28:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:28:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-11-19 07:28:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:46,187 INFO L225 Difference]: With dead ends: 178 [2022-11-19 07:28:46,187 INFO L226 Difference]: Without dead ends: 99 [2022-11-19 07:28:46,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:28:46,188 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 39 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:46,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 555 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:28:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-19 07:28:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-11-19 07:28:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-19 07:28:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2022-11-19 07:28:46,202 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 70 [2022-11-19 07:28:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:46,203 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2022-11-19 07:28:46,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:28:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2022-11-19 07:28:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:28:46,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:46,204 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:46,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:46,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:46,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1370238580, now seen corresponding path program 1 times [2022-11-19 07:28:46,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:46,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004277849] [2022-11-19 07:28:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:46,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:28:48,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:48,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004277849] [2022-11-19 07:28:48,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004277849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:48,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541710101] [2022-11-19 07:28:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:48,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:48,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:48,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:28:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 07:28:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:28:52,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:28:52,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541710101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:52,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001271365] [2022-11-19 07:28:52,555 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-19 07:28:52,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:52,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:52,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:52,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:52,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:52,795 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-19 07:28:52,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-19 07:28:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:52,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-19 07:28:52,929 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:28:52,941 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:28:52,962 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:28:52,975 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:28:52,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 07:28:53,042 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:28:53,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-19 07:28:53,074 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:28:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:28:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:28:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:28:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:28:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:28:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:28:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:28:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:28:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-11-19 07:28:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-11-19 07:28:53,663 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-11-19 07:28:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:53,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-11-19 07:28:53,907 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:54,053 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:28:54,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:28:54,098 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:28:54,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-19 07:29:01,736 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 165 for LOIs [2022-11-19 07:29:03,715 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-11-19 07:29:03,771 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:03,780 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:03,793 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:03,806 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:03,830 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:03,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 07:29:03,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-19 07:29:03,870 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:03,888 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:29:03,889 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-11-19 07:29:03,891 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:29:03,968 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2001271365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:12,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:12,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 6] total 42 [2022-11-19 07:29:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204564825] [2022-11-19 07:29:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:12,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:29:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:12,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:29:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1554, Unknown=1, NotChecked=0, Total=1722 [2022-11-19 07:29:12,464 INFO L87 Difference]: Start difference. First operand 94 states and 137 transitions. Second operand has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 07:29:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:17,452 INFO L93 Difference]: Finished difference Result 223 states and 321 transitions. [2022-11-19 07:29:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:29:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 72 [2022-11-19 07:29:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:17,454 INFO L225 Difference]: With dead ends: 223 [2022-11-19 07:29:17,455 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 07:29:17,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=241, Invalid=2208, Unknown=1, NotChecked=0, Total=2450 [2022-11-19 07:29:17,457 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 163 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:17,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 700 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1642 Invalid, 0 Unknown, 147 Unchecked, 3.5s Time] [2022-11-19 07:29:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 07:29:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-11-19 07:29:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 73 states have internal predecessors, (81), 39 states have call successors, (39), 10 states have call predecessors, (39), 13 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-19 07:29:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2022-11-19 07:29:17,488 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2022-11-19 07:29:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:17,489 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2022-11-19 07:29:17,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 07:29:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2022-11-19 07:29:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:29:17,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:17,491 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:17,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:29:17,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash -782095385, now seen corresponding path program 1 times [2022-11-19 07:29:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:17,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044628207] [2022-11-19 07:29:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:17,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:29:18,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:18,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044628207] [2022-11-19 07:29:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044628207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910799560] [2022-11-19 07:29:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:18,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:18,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:29:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:29:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:19,346 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-11-19 07:29:19,352 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-19 07:29:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:29:19,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:19,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:19,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-19 07:29:19,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:19,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-19 07:29:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:29:19,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910799560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:19,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603215171] [2022-11-19 07:29:19,821 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-19 07:29:19,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:19,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:19,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:19,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:19,963 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-19 07:29:19,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-19 07:29:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:19,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-19 07:29:20,059 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:20,067 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:20,073 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:20,086 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:20,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-19 07:29:20,113 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:20,126 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:20,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 07:29:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:29:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:29:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:29:20,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:29:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:29:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:29:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:29:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:29:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-11-19 07:29:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:20,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-11-19 07:29:20,580 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:29:20,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:20,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 31 [2022-11-19 07:29:20,755 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:29:20,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-11-19 07:29:20,771 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:29:20,952 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:29:20,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:29:20,987 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:29:20,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-19 07:29:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:36,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:41,617 INFO L321 Elim1Store]: treesize reduction 4691, result has 0.0 percent of original size [2022-11-19 07:29:41,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 24 select indices, 24 select index equivalence classes, 12 disjoint index pairs (out of 276 index pairs), introduced 29 new quantified variables, introduced 302 case distinctions, treesize of input 3537 treesize of output 1 [2022-11-19 07:29:47,743 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 200 for LOIs [2022-11-19 07:29:48,824 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:29:49,565 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-11-19 07:29:49,629 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:49,641 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:49,651 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:49,665 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:49,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-11-19 07:29:49,703 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:49,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 07:29:49,738 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:29:49,749 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2022-11-19 07:29:49,761 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-11-19 07:29:49,764 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:29:49,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:08,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [603215171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:08,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:08,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [5, 12, 9] total 48 [2022-11-19 07:30:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444935558] [2022-11-19 07:30:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:30:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:30:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:30:08,441 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-19 07:30:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:13,486 INFO L93 Difference]: Finished difference Result 309 states and 442 transitions. [2022-11-19 07:30:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:30:13,487 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 73 [2022-11-19 07:30:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:13,489 INFO L225 Difference]: With dead ends: 309 [2022-11-19 07:30:13,489 INFO L226 Difference]: Without dead ends: 232 [2022-11-19 07:30:13,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 158 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:30:13,491 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 173 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:13,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1606 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1600 Invalid, 0 Unknown, 374 Unchecked, 3.4s Time] [2022-11-19 07:30:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-19 07:30:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 217. [2022-11-19 07:30:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 133 states have internal predecessors, (153), 72 states have call successors, (72), 18 states have call predecessors, (72), 22 states have return successors, (84), 69 states have call predecessors, (84), 68 states have call successors, (84) [2022-11-19 07:30:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 309 transitions. [2022-11-19 07:30:13,544 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 309 transitions. Word has length 73 [2022-11-19 07:30:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:13,545 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 309 transitions. [2022-11-19 07:30:13,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-19 07:30:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 309 transitions. [2022-11-19 07:30:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:30:13,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:13,547 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:13,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:13,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:30:13,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1372413686, now seen corresponding path program 1 times [2022-11-19 07:30:13,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:13,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986957948] [2022-11-19 07:30:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:30:15,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986957948] [2022-11-19 07:30:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986957948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017260] [2022-11-19 07:30:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:15,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:15,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:30:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:30:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:16,086 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:30:16,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:30:16,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:30:16,235 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:30:16,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:30:16,242 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2022-11-19 07:30:16,312 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-19 07:30:16,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 87 [2022-11-19 07:30:16,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 07:30:16,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 30 [2022-11-19 07:30:16,419 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-19 07:30:16,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 31 [2022-11-19 07:30:16,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:30:16,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-19 07:30:16,496 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-19 07:30:16,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:30:16,622 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select v_DerPreprocessor_18 24) (select .cse1 24)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)))))) is different from true [2022-11-19 07:30:17,052 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24))))))) is different from true [2022-11-19 07:30:17,080 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24)))))) (not (= (mod |c_assume_abort_if_not_#in~cond| 256) 0))) is different from true [2022-11-19 07:30:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:30:17,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:17,185 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 46 [2022-11-19 07:30:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:30:17,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798047018] [2022-11-19 07:30:17,582 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-19 07:30:17,583 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:17,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:17,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:17,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:17,719 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-19 07:30:17,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-19 07:30:17,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:17,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:17,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-19 07:30:17,817 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:17,826 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:17,832 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:17,839 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:17,926 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-11-19 07:30:17,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 61 [2022-11-19 07:30:17,941 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:17,987 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:17,987 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:17,998 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:18,041 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:18,042 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,120 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-11-19 07:30:18,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2022-11-19 07:30:18,149 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:18,185 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:30:18,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:30:18,233 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-19 07:30:18,233 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 29 [2022-11-19 07:30:18,278 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-19 07:30:18,278 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 29 [2022-11-19 07:30:18,311 INFO L321 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2022-11-19 07:30:18,312 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 39 [2022-11-19 07:30:18,323 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:18,352 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:18,352 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:18,367 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:30:18,367 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-11-19 07:30:18,396 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:18,397 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:18,427 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-11-19 07:30:18,427 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 29 [2022-11-19 07:30:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:30:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:30:18,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:30:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:30:18,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:18,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:18,764 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:30:18,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-19 07:30:18,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:30:19,416 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2022-11-19 07:30:20,309 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 156 for LOIs [2022-11-19 07:30:22,384 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,404 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:30:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:30:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:30:22,469 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,495 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,503 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,515 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:22,531 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:22,987 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:30:22,989 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 134 for LOIs [2022-11-19 07:30:23,034 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:30:23,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:29,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [798047018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:29,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:29,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 17, 8] total 51 [2022-11-19 07:30:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342346121] [2022-11-19 07:30:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:30:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:30:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2087, Unknown=11, NotChecked=282, Total=2550 [2022-11-19 07:30:29,842 INFO L87 Difference]: Start difference. First operand 217 states and 309 transitions. Second operand has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 07:30:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:32,274 INFO L93 Difference]: Finished difference Result 325 states and 458 transitions. [2022-11-19 07:30:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:30:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2022-11-19 07:30:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:32,277 INFO L225 Difference]: With dead ends: 325 [2022-11-19 07:30:32,277 INFO L226 Difference]: Without dead ends: 232 [2022-11-19 07:30:32,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=188, Invalid=2259, Unknown=15, NotChecked=294, Total=2756 [2022-11-19 07:30:32,279 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 69 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:32,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 328 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 972 Invalid, 0 Unknown, 108 Unchecked, 2.1s Time] [2022-11-19 07:30:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-19 07:30:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-11-19 07:30:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 132 states have (on average 1.25) internal successors, (165), 142 states have internal predecessors, (165), 73 states have call successors, (73), 20 states have call predecessors, (73), 23 states have return successors, (79), 70 states have call predecessors, (79), 69 states have call successors, (79) [2022-11-19 07:30:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 317 transitions. [2022-11-19 07:30:32,364 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 317 transitions. Word has length 73 [2022-11-19 07:30:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:32,365 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 317 transitions. [2022-11-19 07:30:32,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 07:30:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 317 transitions. [2022-11-19 07:30:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:30:32,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:32,366 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:32,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:32,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash -714667099, now seen corresponding path program 1 times [2022-11-19 07:30:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894515748] [2022-11-19 07:30:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:30:32,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894515748] [2022-11-19 07:30:32,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894515748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502188135] [2022-11-19 07:30:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:32,990 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:33,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59cf0ba-9cbb-4e43-8d26-bbecf9257dc4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:30:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:30:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:30:33,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:30:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502188135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549230840] [2022-11-19 07:30:34,011 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-19 07:30:34,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:34,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:34,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:34,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:34,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,117 INFO L321 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2022-11-19 07:30:34,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2022-11-19 07:30:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,240 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-19 07:30:34,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-19 07:30:34,318 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,338 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,346 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,360 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,408 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:34,408 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:34,416 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,424 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,495 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-11-19 07:30:34,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2022-11-19 07:30:34,540 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:34,541 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,609 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-11-19 07:30:34,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 61 [2022-11-19 07:30:34,635 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,689 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:30:34,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-11-19 07:30:34,737 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-19 07:30:34,737 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 29 [2022-11-19 07:30:34,777 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-19 07:30:34,777 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 29 [2022-11-19 07:30:34,800 INFO L321 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-11-19 07:30:34,800 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 23 [2022-11-19 07:30:34,809 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:30:34,838 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:34,838 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:34,860 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 07:30:34,860 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 17 [2022-11-19 07:30:34,873 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:30:34,873 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-11-19 07:30:34,903 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-11-19 07:30:34,903 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 29 [2022-11-19 07:30:34,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:30:34,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:30:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 36 treesize of output 22 [2022-11-19 07:30:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-19 07:30:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:35,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-19 07:30:35,199 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:30:35,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-19 07:30:35,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:30:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:36,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,255 WARN L233 SmtUtils]: Spent 38.68s on a formula simplification. DAG size of input: 473 DAG size of output: 265 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:31:15,257 INFO L321 Elim1Store]: treesize reduction 2284, result has 29.0 percent of original size [2022-11-19 07:31:15,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 20 select indices, 20 select index equivalence classes, 15 disjoint index pairs (out of 190 index pairs), introduced 21 new quantified variables, introduced 178 case distinctions, treesize of input 1940 treesize of output 2171 [2022-11-19 07:31:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:15,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:15,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:33:38,695 WARN L233 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 703 DAG size of output: 381 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:33:38,696 INFO L321 Elim1Store]: treesize reduction 3329, result has 32.2 percent of original size [2022-11-19 07:33:38,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 20 select indices, 20 select index equivalence classes, 16 disjoint index pairs (out of 190 index pairs), introduced 22 new quantified variables, introduced 215 case distinctions, treesize of input 3110 treesize of output 3808 [2022-11-19 07:33:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:44,355 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-11-19 07:33:44,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 685 [2022-11-19 07:33:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:33:46,759 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-11-19 07:33:46,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 690