./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0 --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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- 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-e04fb08 [2022-11-16 16:18:45,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:18:45,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:18:45,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:18:45,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:18:45,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:18:45,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:18:45,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:18:45,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:18:45,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:18:45,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:18:45,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:18:45,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:18:45,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:18:45,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:18:45,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:18:45,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:18:45,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:18:45,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:18:45,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:18:45,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:18:45,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:18:45,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:18:45,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:18:45,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:18:45,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:18:45,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:18:45,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:18:45,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:18:45,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:18:45,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:18:45,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:18:45,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:18:45,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:18:45,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:18:45,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:18:45,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:18:45,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:18:45,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:18:45,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:18:45,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:18:45,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 16:18:45,650 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:18:45,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:18:45,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:18:45,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:18:45,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:18:45,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:18:45,653 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:18:45,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:18:45,653 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:18:45,654 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:18:45,655 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:18:45,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:18:45,655 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:18:45,656 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:18:45,656 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:18:45,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:18:45,657 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:18:45,657 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:18:45,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:18:45,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:18:45,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:18:45,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:18:45,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:18:45,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:18:45,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:18:45,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:18:45,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:18:45,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:18:45,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:18:45,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:45,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:18:45,661 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:18:45,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:18:45,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:18:45,662 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:18:45,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:18:45,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:18:45,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:18:45,673 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_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-16 16:18:45,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:18:46,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:18:46,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:18:46,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:18:46,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:18:46,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-16 16:18:46,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/data/1f79cbc1f/974d73d0762b4f33b09887ca500a101f/FLAGa16e3b7f6 [2022-11-16 16:18:46,867 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:18:46,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-16 16:18:46,901 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/data/1f79cbc1f/974d73d0762b4f33b09887ca500a101f/FLAGa16e3b7f6 [2022-11-16 16:18:46,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/data/1f79cbc1f/974d73d0762b4f33b09887ca500a101f [2022-11-16 16:18:46,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:18:46,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:18:46,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:46,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:18:46,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:18:46,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:46" (1/1) ... [2022-11-16 16:18:46,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5364b60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:46, skipping insertion in model container [2022-11-16 16:18:46,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:46" (1/1) ... [2022-11-16 16:18:46,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:18:47,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:18:47,330 WARN L229 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_87c85eb0-8eb0-4cdb-8796-f671f681dede/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-16 16:18:47,336 WARN L229 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_87c85eb0-8eb0-4cdb-8796-f671f681dede/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-16 16:18:48,231 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,239 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,239 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,241 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,242 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,257 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,258 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,269 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,270 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,274 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,275 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,276 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,277 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,654 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 16:18:48,655 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 16:18:48,657 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 16:18:48,658 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 16:18:48,660 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 16:18:48,660 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 16:18:48,661 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 16:18:48,661 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 16:18:48,662 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 16:18:48,663 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 16:18:48,790 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 16:18:48,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:48,830 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:18:48,844 WARN L229 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_87c85eb0-8eb0-4cdb-8796-f671f681dede/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-16 16:18:48,845 WARN L229 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_87c85eb0-8eb0-4cdb-8796-f671f681dede/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-16 16:18:48,884 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,885 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,885 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,886 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,887 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,894 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,895 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,896 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,897 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,898 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,899 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,899 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,900 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 16:18:48,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 16:18:48,940 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 16:18:48,940 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 16:18:48,941 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 16:18:48,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 16:18:48,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 16:18:48,944 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 16:18:48,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 16:18:48,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 16:18:48,946 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 16:18:48,973 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 16:18:48,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:49,279 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:18:49,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49 WrapperNode [2022-11-16 16:18:49,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:49,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:49,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:18:49,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:18:49,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,424 INFO L138 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2022-11-16 16:18:49,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:49,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:18:49,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:18:49,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:18:49,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,493 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:18:49,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:18:49,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:18:49,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:18:49,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (1/1) ... [2022-11-16 16:18:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:49,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:18:49,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:18:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:18:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 16:18:49,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 16:18:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-16 16:18:49,629 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-16 16:18:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 16:18:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-16 16:18:49,630 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-16 16:18:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:18:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 16:18:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:18:49,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:18:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 16:18:49,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 16:18:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:18:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 16:18:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 16:18:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-16 16:18:49,631 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-16 16:18:49,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:18:49,961 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:18:49,963 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:18:50,279 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:18:50,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:18:50,420 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 16:18:50,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:50 BoogieIcfgContainer [2022-11-16 16:18:50,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:18:50,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:18:50,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:18:50,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:18:50,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:18:46" (1/3) ... [2022-11-16 16:18:50,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e77e057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:50, skipping insertion in model container [2022-11-16 16:18:50,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:49" (2/3) ... [2022-11-16 16:18:50,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e77e057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:50, skipping insertion in model container [2022-11-16 16:18:50,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:50" (3/3) ... [2022-11-16 16:18:50,432 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-16 16:18:50,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:18:50,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:18:50,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:18:50,510 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;@57da6d30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:18:50,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:18:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 16:18:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 16:18:50,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:50,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:50,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -176466560, now seen corresponding path program 1 times [2022-11-16 16:18:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:50,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007235952] [2022-11-16 16:18:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:18:51,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007235952] [2022-11-16 16:18:51,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007235952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:18:51,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218350582] [2022-11-16 16:18:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:51,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:51,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:18:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 16:18:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:51,816 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 [2022-11-16 16:18:51,829 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 [2022-11-16 16:18:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:51,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:51,963 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 37 treesize of output 43 [2022-11-16 16:18:51,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:51,986 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 35 treesize of output 41 [2022-11-16 16:18:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:18:53,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:53,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218350582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:53,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:18:53,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-16 16:18:53,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641118245] [2022-11-16 16:18:53,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:53,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:18:53,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:18:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:18:53,623 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 16:18:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:53,927 INFO L93 Difference]: Finished difference Result 104 states and 149 transitions. [2022-11-16 16:18:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:18:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-16 16:18:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:53,940 INFO L225 Difference]: With dead ends: 104 [2022-11-16 16:18:53,940 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 16:18:53,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:18:53,946 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:53,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 145 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-16 16:18:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 16:18:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-11-16 16:18:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 16:18:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-11-16 16:18:53,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 37 [2022-11-16 16:18:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:53,997 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-11-16 16:18:53,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 16:18:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-11-16 16:18:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 16:18:54,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:54,000 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:54,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:54,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 16:18:54,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1924856341, now seen corresponding path program 1 times [2022-11-16 16:18:54,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:54,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074343050] [2022-11-16 16:18:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:54,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:18:54,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074343050] [2022-11-16 16:18:54,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074343050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:18:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826762772] [2022-11-16 16:18:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:54,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:54,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:54,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:18:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 16:18:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:55,017 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 [2022-11-16 16:18:55,042 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 18 treesize of output 19 [2022-11-16 16:18:55,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-16 16:18:55,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-16 16:18:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,155 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-16 16:18:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-16 16:18:55,278 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-16 16:18:55,279 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-16 16:18:55,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-16 16:18:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-16 16:18:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-16 16:18:55,341 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 16 treesize of output 15 [2022-11-16 16:18:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-16 16:18:55,364 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 13 treesize of output 9 [2022-11-16 16:18:56,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:18:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:18:56,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:18:56,718 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-16 16:18:56,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 102 treesize of output 40 [2022-11-16 16:18:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:56,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:18:56,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:18:56,738 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 16:18:56,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 19 [2022-11-16 16:18:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:18:56,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:00,636 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) (.cse2 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-16 16:19:00,795 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse6 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse2 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse2 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse5) 0))) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse5) 0))) (= v_ArrVal_212 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse6) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse6) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))))) is different from false [2022-11-16 16:19:00,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:00,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-16 16:19:00,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:00,919 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 141 treesize of output 137 [2022-11-16 16:19:00,933 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 132 treesize of output 128 [2022-11-16 16:19:00,950 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 128 treesize of output 126 [2022-11-16 16:19:00,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:00,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-16 16:19:00,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:00,999 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 516 treesize of output 444 [2022-11-16 16:19:01,022 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 270 treesize of output 266 [2022-11-16 16:19:01,043 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 318 treesize of output 310 [2022-11-16 16:19:01,172 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 6 treesize of output 4 [2022-11-16 16:19:01,189 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 6 treesize of output 4 [2022-11-16 16:19:01,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:01,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2022-11-16 16:19:01,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:01,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 79 [2022-11-16 16:19:01,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:01,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-16 16:19:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:01,382 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 64 treesize of output 56 [2022-11-16 16:19:01,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,391 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 11 treesize of output 7 [2022-11-16 16:19:01,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,409 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 16:19:01,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-11-16 16:19:01,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,431 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-16 16:19:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-16 16:19:01,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,446 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-16 16:19:01,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-16 16:19:01,454 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 16:19:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:01,473 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-16 16:19:01,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-16 16:19:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-16 16:19:01,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826762772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:01,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985588361] [2022-11-16 16:19:01,643 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-16 16:19:01,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:19:01,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:19:01,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:19:01,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:19:01,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:01,781 INFO L321 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-16 16:19:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-16 16:19:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:01,880 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:19:01,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:19:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:19:02,273 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 [2022-11-16 16:19:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:19:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:19:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:02,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:02,437 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 16:19:02,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-16 16:19:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,576 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:19:02,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-16 16:19:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:19:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-16 16:19:02,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:19:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-16 16:19:02,800 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 [2022-11-16 16:19:02,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,822 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 [2022-11-16 16:19:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,849 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 47 treesize of output 13 [2022-11-16 16:19:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,866 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 41 treesize of output 23 [2022-11-16 16:19:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,888 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 [2022-11-16 16:19:02,911 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 [2022-11-16 16:19:02,967 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 [2022-11-16 16:19:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:19:02,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:02,989 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 [2022-11-16 16:19:03,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,008 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 41 treesize of output 23 [2022-11-16 16:19:03,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,027 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 [2022-11-16 16:19:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,046 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 [2022-11-16 16:19:03,057 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 [2022-11-16 16:19:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,090 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 [2022-11-16 16:19:03,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,104 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 [2022-11-16 16:19:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,125 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 [2022-11-16 16:19:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:03,153 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 [2022-11-16 16:19:03,643 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-16 16:19:03,833 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-16 16:19:03,904 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:19:03,928 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:19:07,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1985588361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:19:07,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:19:07,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2022-11-16 16:19:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844273416] [2022-11-16 16:19:07,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:19:07,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 16:19:07,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:19:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 16:19:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=669, Unknown=2, NotChecked=106, Total=870 [2022-11-16 16:19:07,297 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 16:19:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:07,932 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2022-11-16 16:19:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 16:19:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-16 16:19:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:07,935 INFO L225 Difference]: With dead ends: 89 [2022-11-16 16:19:07,935 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 16:19:07,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=102, Invalid=716, Unknown=2, NotChecked=110, Total=930 [2022-11-16 16:19:07,937 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:07,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 277 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-11-16 16:19:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 16:19:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-11-16 16:19:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 16:19:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-11-16 16:19:07,955 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2022-11-16 16:19:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:07,956 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-11-16 16:19:07,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 16:19:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-11-16 16:19:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 16:19:07,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:07,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:07,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:08,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:08,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1266222812, now seen corresponding path program 1 times [2022-11-16 16:19:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:19:08,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935526507] [2022-11-16 16:19:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:19:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:19:08,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:19:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935526507] [2022-11-16 16:19:08,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935526507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:19:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603325796] [2022-11-16 16:19:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:08,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:08,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:19:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 16:19:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:19:08,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:19:08,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603325796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:19:08,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:19:08,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-16 16:19:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050339939] [2022-11-16 16:19:08,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:19:08,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:19:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:19:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:19:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 16:19:08,613 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:19:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:08,771 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2022-11-16 16:19:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:19:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-16 16:19:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:08,774 INFO L225 Difference]: With dead ends: 88 [2022-11-16 16:19:08,774 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 16:19:08,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:19:08,780 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:08,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 149 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:19:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 16:19:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-16 16:19:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-16 16:19:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-16 16:19:08,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2022-11-16 16:19:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:08,811 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-16 16:19:08,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:19:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-16 16:19:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 16:19:08,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:08,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:08,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:09,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:09,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:09,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash -693180958, now seen corresponding path program 1 times [2022-11-16 16:19:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:19:09,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440840099] [2022-11-16 16:19:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:19:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:19:09,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:19:09,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440840099] [2022-11-16 16:19:09,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440840099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:19:09,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108512413] [2022-11-16 16:19:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:09,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:09,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:09,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:09,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:19:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:19:09,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:19:09,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:19:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108512413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:19:09,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:19:09,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-16 16:19:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060211714] [2022-11-16 16:19:09,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:19:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:19:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:19:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:19:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:19:09,522 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:19:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:09,769 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2022-11-16 16:19:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:19:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-16 16:19:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:09,772 INFO L225 Difference]: With dead ends: 105 [2022-11-16 16:19:09,772 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 16:19:09,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 16:19:09,773 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:09,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 175 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:19:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 16:19:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-11-16 16:19:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-16 16:19:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-16 16:19:09,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2022-11-16 16:19:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:09,792 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-16 16:19:09,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:19:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-16 16:19:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 16:19:09,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:09,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:09,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:10,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:10,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash 938537906, now seen corresponding path program 1 times [2022-11-16 16:19:10,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:19:10,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102676923] [2022-11-16 16:19:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:19:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:19:10,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:19:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102676923] [2022-11-16 16:19:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102676923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:19:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208282251] [2022-11-16 16:19:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:10,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:10,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:19:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:19:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:19:10,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:19:10,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208282251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:19:10,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:19:10,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 16:19:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672966599] [2022-11-16 16:19:10,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:19:10,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:19:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:19:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:19:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:19:10,519 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:19:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:10,583 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2022-11-16 16:19:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:19:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-16 16:19:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:10,588 INFO L225 Difference]: With dead ends: 106 [2022-11-16 16:19:10,588 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 16:19:10,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:19:10,590 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:10,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:19:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 16:19:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-16 16:19:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-16 16:19:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-11-16 16:19:10,628 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2022-11-16 16:19:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:10,630 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-11-16 16:19:10,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 16:19:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-11-16 16:19:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 16:19:10,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:10,635 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:10,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:10,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:10,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1523962277, now seen corresponding path program 1 times [2022-11-16 16:19:10,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:19:10,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824884676] [2022-11-16 16:19:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:10,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:19:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:19:11,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:19:11,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824884676] [2022-11-16 16:19:11,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824884676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:19:11,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256294866] [2022-11-16 16:19:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:11,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:11,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:11,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:11,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:19:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 16:19:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:11,438 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-16 16:19:11,438 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 40 treesize of output 78 [2022-11-16 16:19:11,459 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:19:11,459 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 9 treesize of output 15 [2022-11-16 16:19:11,469 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 [2022-11-16 16:19:11,479 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 16 treesize of output 15 [2022-11-16 16:19:11,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 26 [2022-11-16 16:19:11,530 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 21 treesize of output 13 [2022-11-16 16:19:34,124 WARN L233 SmtUtils]: Spent 14.63s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:19:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:58,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:20:03,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256294866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:03,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1678952315] [2022-11-16 16:20:03,320 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-16 16:20:03,320 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:20:03,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:20:03,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:20:03,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:20:03,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,399 INFO L321 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-16 16:20:03,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-16 16:20:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,480 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:20:03,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:20:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:20:03,799 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 [2022-11-16 16:20:03,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:20:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:20:03,925 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 [2022-11-16 16:20:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:20:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:03,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:20:04,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:04,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:04,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:20:04,871 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 140 for LOIs [2022-11-16 16:20:05,583 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 179 for LOIs [2022-11-16 16:20:05,680 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:20:05,701 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-16 16:20:05,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:20:34,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1678952315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:20:34,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:20:34,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 15, 8] total 43 [2022-11-16 16:20:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280811946] [2022-11-16 16:20:34,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:20:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 16:20:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:20:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 16:20:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1555, Unknown=62, NotChecked=0, Total=1806 [2022-11-16 16:20:34,748 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:20:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:20:35,094 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2022-11-16 16:20:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 16:20:35,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-16 16:20:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:20:35,096 INFO L225 Difference]: With dead ends: 115 [2022-11-16 16:20:35,096 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 16:20:35,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=189, Invalid=1555, Unknown=62, NotChecked=0, Total=1806 [2022-11-16 16:20:35,097 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:20:35,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 306 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-11-16 16:20:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 16:20:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-16 16:20:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 44 states have internal predecessors, (53), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-16 16:20:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2022-11-16 16:20:35,118 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2022-11-16 16:20:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:20:35,119 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2022-11-16 16:20:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:20:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2022-11-16 16:20:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 16:20:35,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:20:35,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:20:35,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 16:20:35,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:35,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:20:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:20:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1772458512, now seen corresponding path program 1 times [2022-11-16 16:20:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:20:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924747971] [2022-11-16 16:20:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:20:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:20:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:20:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:20:35,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:20:35,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924747971] [2022-11-16 16:20:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924747971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:20:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353764553] [2022-11-16 16:20:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:20:35,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:20:35,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:20:35,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:20:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:20:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 16:20:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:36,000 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 16:20:36,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:36,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:20:36,065 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-16 16:20:36,065 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-16 16:20:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:36,072 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 111 treesize of output 91 [2022-11-16 16:20:36,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:36,080 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 13 treesize of output 15 [2022-11-16 16:20:36,088 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 14 treesize of output 13 [2022-11-16 16:20:36,201 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_23 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse0 (select .cse1 0))) (and (= .cse0 (select v_DerPreprocessor_24 24)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|) (= .cse0 (select .cse1 24)) (not (= .cse0 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_23) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_24) .cse0 v_DerPreprocessor_23) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_24) .cse0) (select |c_#memory_$Pointer$.base| .cse0)))))) is different from true [2022-11-16 16:20:45,121 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:20:48,537 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_26 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50| Int) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|))) (let ((.cse1 (select .cse0 0)) (.cse2 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|))) (and (= (select .cse0 8) 0) (= (select v_DerPreprocessor_26 24) .cse1) (= (select .cse0 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_25) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_26) .cse1 v_DerPreprocessor_25) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_26) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (<= (+ 2 .cse1) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|) (= (select .cse2 16) 0) (not (= 0 .cse1)) (= (select .cse0 24) .cse1) (= (select .cse2 8) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_23 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int))) (let ((.cse4 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse3 (select .cse4 0))) (and (= .cse3 (select v_DerPreprocessor_24 24)) (<= (+ .cse3 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|) (= .cse3 (select .cse4 24)) (not (= .cse3 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_23) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_24) .cse3 v_DerPreprocessor_23) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_24) .cse3) (select |c_#memory_$Pointer$.base| .cse3))))))) is different from true [2022-11-16 16:20:50,129 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_26 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50| Int) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|))) (let ((.cse1 (select .cse0 0)) (.cse2 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|))) (and (= (select .cse0 8) 0) (= (select v_DerPreprocessor_26 24) .cse1) (= (select .cse0 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_25) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_26) .cse1 v_DerPreprocessor_25) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_26) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (<= (+ 2 .cse1) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|) (= (select .cse2 16) 0) (not (= 0 .cse1)) (= (select .cse0 24) .cse1) (= (select .cse2 8) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_50|))))) (exists ((v_DerPreprocessor_30 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3| Int) (v_DerPreprocessor_29 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3|))) (let ((.cse5 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3|)) (.cse4 (select .cse3 0))) (and (= (select .cse3 8) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3|) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3|) (= (select .cse5 16) 0) (= .cse4 (select v_DerPreprocessor_29 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_30) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_29) .cse4 v_DerPreprocessor_30) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_29) .cse4) (select |c_#memory_$Pointer$.base| .cse4)) (= 0 (select .cse5 8)) (= .cse4 (select .cse3 24)) (= (select .cse3 16) 0) (not (= .cse4 0)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4| Int) (v_DerPreprocessor_27 (Array Int Int)) (v_DerPreprocessor_28 (Array Int Int))) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4|))) (let ((.cse6 (select .cse7 0)) (.cse8 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4|))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_28) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4| v_DerPreprocessor_27) .cse6 v_DerPreprocessor_28) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4| v_DerPreprocessor_27) .cse6) (select |c_#memory_$Pointer$.base| .cse6)) (= (select .cse7 24) .cse6) (= (select .cse8 16) 0) (= (select .cse7 16) 0) (= (select v_DerPreprocessor_27 24) .cse6) (<= (+ 2 .cse6) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4|) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_4|) (not (= .cse6 0)) (= (select .cse8 8) 0) (= 0 (select .cse7 8)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_23 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int))) (let ((.cse10 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse9 (select .cse10 0))) (and (= .cse9 (select v_DerPreprocessor_24 24)) (<= (+ .cse9 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49|) (= .cse9 (select .cse10 24)) (not (= .cse9 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_23) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_24) .cse9 v_DerPreprocessor_23) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_24) .cse9) (select |c_#memory_$Pointer$.base| .cse9))))))) is different from true [2022-11-16 16:20:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 16:20:53,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:20:58,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353764553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546937594] [2022-11-16 16:20:58,301 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-16 16:20:58,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:20:58,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:20:58,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:20:58,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:20:58,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,391 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:20:58,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:20:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:20:58,671 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 [2022-11-16 16:20:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:20:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:20:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:20:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,827 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 50 treesize of output 28 [2022-11-16 16:20:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:20:58,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:20:58,875 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 16:20:58,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-16 16:20:58,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:58,968 INFO L321 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-16 16:20:58,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-16 16:20:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:20:59,035 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 16:20:59,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-16 16:20:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,073 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 35 treesize of output 7 [2022-11-16 16:20:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,190 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:20:59,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-16 16:20:59,263 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 [2022-11-16 16:20:59,282 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 [2022-11-16 16:20:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:20:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,306 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 [2022-11-16 16:20:59,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,337 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 47 treesize of output 13 [2022-11-16 16:20:59,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,360 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 47 treesize of output 13 [2022-11-16 16:20:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,374 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 41 treesize of output 23 [2022-11-16 16:20:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,411 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 [2022-11-16 16:20:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,424 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 [2022-11-16 16:20:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,443 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 [2022-11-16 16:20:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,475 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 [2022-11-16 16:21:00,549 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-16 16:21:01,006 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 163 for LOIs [2022-11-16 16:21:01,067 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:21:01,091 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-16 16:21:01,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:21:08,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [546937594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:21:08,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:21:08,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-16 16:21:08,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470222360] [2022-11-16 16:21:08,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:21:08,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 16:21:08,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:21:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 16:21:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2105, Unknown=82, NotChecked=288, Total=2652 [2022-11-16 16:21:08,144 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:21:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:21:08,763 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2022-11-16 16:21:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 16:21:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-16 16:21:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:21:08,766 INFO L225 Difference]: With dead ends: 122 [2022-11-16 16:21:08,766 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 16:21:08,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=184, Invalid=2193, Unknown=85, NotChecked=294, Total=2756 [2022-11-16 16:21:08,769 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:21:08,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 188 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 134 Unchecked, 0.4s Time] [2022-11-16 16:21:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 16:21:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2022-11-16 16:21:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-16 16:21:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2022-11-16 16:21:08,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 46 [2022-11-16 16:21:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:21:08,803 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2022-11-16 16:21:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:21:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2022-11-16 16:21:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 16:21:08,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:21:08,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:21:08,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:09,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 16:21:09,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:21:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:21:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2001458783, now seen corresponding path program 1 times [2022-11-16 16:21:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:21:09,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749649064] [2022-11-16 16:21:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:21:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:21:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:21:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:21:09,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:21:09,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749649064] [2022-11-16 16:21:09,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749649064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:21:09,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926103655] [2022-11-16 16:21:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:21:09,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:21:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:21:09,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:21:09,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:21:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:21:10,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 16:21:10,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:21:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 16:21:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:21:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:21:13,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926103655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:21:13,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123055881] [2022-11-16 16:21:13,422 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:21:13,423 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:21:13,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:21:13,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:21:13,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:21:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,529 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:21:13,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:21:13,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:21:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:21:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:21:13,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:21:13,912 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 [2022-11-16 16:21:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:21:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:13,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:21:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:14,027 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 [2022-11-16 16:21:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:14,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:14,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:21:14,834 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 132 for LOIs [2022-11-16 16:21:15,867 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2022-11-16 16:21:15,959 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:21:15,980 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:21:16,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:21:25,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [123055881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:21:25,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:21:25,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-16 16:21:25,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103361110] [2022-11-16 16:21:25,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:21:25,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 16:21:25,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:21:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 16:21:25,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1163, Unknown=1, NotChecked=0, Total=1332 [2022-11-16 16:21:25,710 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:21:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:21:30,870 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2022-11-16 16:21:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:21:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-16 16:21:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:21:30,872 INFO L225 Difference]: With dead ends: 155 [2022-11-16 16:21:30,873 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 16:21:30,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=270, Invalid=1535, Unknown=1, NotChecked=0, Total=1806 [2022-11-16 16:21:30,874 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 95 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:21:30,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 212 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 563 Invalid, 0 Unknown, 110 Unchecked, 1.8s Time] [2022-11-16 16:21:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 16:21:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-11-16 16:21:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 68 states have internal predecessors, (79), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-11-16 16:21:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2022-11-16 16:21:30,915 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 47 [2022-11-16 16:21:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:21:30,915 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2022-11-16 16:21:30,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:21:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2022-11-16 16:21:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 16:21:30,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:21:30,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:21:30,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:31,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:21:31,119 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:21:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:21:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash -288172042, now seen corresponding path program 1 times [2022-11-16 16:21:31,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:21:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786884672] [2022-11-16 16:21:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:21:31,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:21:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:21:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:21:31,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:21:31,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786884672] [2022-11-16 16:21:31,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786884672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:21:31,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505275666] [2022-11-16 16:21:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:21:31,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:21:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:21:31,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:21:31,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 16:21:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:21:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 16:21:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:21:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 16:21:34,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:21:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:21:34,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505275666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:21:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103746159] [2022-11-16 16:21:34,753 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:21:34,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:21:34,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:21:34,754 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:21:34,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:21:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:34,837 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:21:34,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:21:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:34,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:21:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:21:35,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:21:35,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:21:35,211 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 [2022-11-16 16:21:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:21:35,299 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 16:21:35,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-16 16:21:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,334 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 50 treesize of output 28 [2022-11-16 16:21:35,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,424 INFO L321 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-16 16:21:35,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-16 16:21:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,538 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:21:35,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-16 16:21:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-16 16:21:35,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:21:35,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:21:35,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:21:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,674 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 [2022-11-16 16:21:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,699 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 47 treesize of output 13 [2022-11-16 16:21:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,714 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 41 treesize of output 23 [2022-11-16 16:21:35,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,734 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 [2022-11-16 16:21:35,747 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 [2022-11-16 16:21:35,764 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 [2022-11-16 16:21:35,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,797 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 [2022-11-16 16:21:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,811 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 [2022-11-16 16:21:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,839 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 29 treesize of output 17 [2022-11-16 16:21:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:21:35,860 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 [2022-11-16 16:21:36,787 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-16 16:21:37,598 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 163 for LOIs [2022-11-16 16:21:37,646 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:21:37,665 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:21:37,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:21:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1103746159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:21:45,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:21:45,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-16 16:21:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231944296] [2022-11-16 16:21:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:21:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 16:21:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:21:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 16:21:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:21:45,803 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:21:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:21:46,552 INFO L93 Difference]: Finished difference Result 183 states and 235 transitions. [2022-11-16 16:21:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:21:46,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-16 16:21:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:21:46,554 INFO L225 Difference]: With dead ends: 183 [2022-11-16 16:21:46,554 INFO L226 Difference]: Without dead ends: 126 [2022-11-16 16:21:46,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 16:21:46,555 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:21:46,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 173 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 253 Invalid, 0 Unknown, 180 Unchecked, 0.5s Time] [2022-11-16 16:21:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-16 16:21:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2022-11-16 16:21:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 77 states have internal predecessors, (91), 27 states have call successors, (27), 11 states have call predecessors, (27), 12 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2022-11-16 16:21:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 148 transitions. [2022-11-16 16:21:46,599 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 148 transitions. Word has length 48 [2022-11-16 16:21:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:21:46,600 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 148 transitions. [2022-11-16 16:21:46,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 16:21:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 148 transitions. [2022-11-16 16:21:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 16:21:46,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:21:46,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:21:46,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:46,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:21:46,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:21:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:21:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash -963369005, now seen corresponding path program 1 times [2022-11-16 16:21:46,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:21:46,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545035826] [2022-11-16 16:21:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:21:46,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:21:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:21:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 16:21:47,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:21:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545035826] [2022-11-16 16:21:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545035826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:21:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951384234] [2022-11-16 16:21:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:21:47,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:21:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:21:47,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:21:47,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:21:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:21:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 16:21:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:21:47,424 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-16 16:21:47,425 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 40 treesize of output 78 [2022-11-16 16:21:47,431 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 [2022-11-16 16:21:47,439 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 16 treesize of output 15 [2022-11-16 16:21:47,478 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 0 case distinctions, treesize of input 48 treesize of output 28 [2022-11-16 16:21:47,482 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 21 treesize of output 13 [2022-11-16 16:22:02,728 WARN L233 SmtUtils]: Spent 11.72s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:22:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:22:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:22:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:22:07,239 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 16:22:07,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 118 treesize of output 72 [2022-11-16 16:22:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:22:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:22:07,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:07,257 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 16:22:07,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 42 [2022-11-16 16:22:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:22:07,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:22:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 16:22:11,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951384234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:22:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752870706] [2022-11-16 16:22:11,772 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:22:11,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:22:11,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:22:11,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:22:11,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:22:11,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:11,865 INFO L321 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-16 16:22:11,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-16 16:22:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:11,941 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:22:11,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:22:12,164 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 [2022-11-16 16:22:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:22:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:22:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:22:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:22:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,326 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 [2022-11-16 16:22:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:22:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:12,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:22:13,995 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2022-11-16 16:22:14,068 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-16 16:22:14,784 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-16 16:22:14,786 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:22:14,803 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:22:14,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:22:26,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4875#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| Int)) (and (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 24)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| 0)) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 24)) 0)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| 5)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| 3)) (<= 0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 24) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|)) (= 16 (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 24)) 0)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| 2)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 1) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| 4)) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_19|) 24)))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:22:26,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:22:26,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:22:26,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2022-11-16 16:22:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555725827] [2022-11-16 16:22:26,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:22:26,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 16:22:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:22:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 16:22:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 16:22:26,470 INFO L87 Difference]: Start difference. First operand 114 states and 148 transitions. Second operand has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-16 16:22:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:22:30,021 INFO L93 Difference]: Finished difference Result 300 states and 451 transitions. [2022-11-16 16:22:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 16:22:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 48 [2022-11-16 16:22:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:22:30,024 INFO L225 Difference]: With dead ends: 300 [2022-11-16 16:22:30,024 INFO L226 Difference]: Without dead ends: 235 [2022-11-16 16:22:30,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 90 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=484, Invalid=4208, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 16:22:30,027 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 87 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 16:22:30,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 684 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1354 Invalid, 0 Unknown, 328 Unchecked, 1.9s Time] [2022-11-16 16:22:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-16 16:22:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2022-11-16 16:22:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 111 states have internal predecessors, (129), 38 states have call successors, (38), 15 states have call predecessors, (38), 19 states have return successors, (51), 36 states have call predecessors, (51), 37 states have call successors, (51) [2022-11-16 16:22:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 218 transitions. [2022-11-16 16:22:30,107 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 218 transitions. Word has length 48 [2022-11-16 16:22:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:22:30,108 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 218 transitions. [2022-11-16 16:22:30,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-16 16:22:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 218 transitions. [2022-11-16 16:22:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 16:22:30,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:22:30,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:22:30,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:30,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 16:22:30,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1106009591, now seen corresponding path program 1 times [2022-11-16 16:22:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:22:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12503327] [2022-11-16 16:22:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:30,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:22:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 16:22:30,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:22:30,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12503327] [2022-11-16 16:22:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12503327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:22:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830873611] [2022-11-16 16:22:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:30,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:22:30,498 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:22:30,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 16:22:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:22:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 16:22:30,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:22:30,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830873611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:22:30,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:22:30,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-16 16:22:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293739492] [2022-11-16 16:22:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:22:30,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:22:30,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:22:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:22:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:22:30,862 INFO L87 Difference]: Start difference. First operand 163 states and 218 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 16:22:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:22:31,107 INFO L93 Difference]: Finished difference Result 239 states and 329 transitions. [2022-11-16 16:22:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:22:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-11-16 16:22:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:22:31,110 INFO L225 Difference]: With dead ends: 239 [2022-11-16 16:22:31,110 INFO L226 Difference]: Without dead ends: 163 [2022-11-16 16:22:31,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:22:31,111 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:22:31,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 166 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:22:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-16 16:22:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-16 16:22:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2) internal successors, (126), 111 states have internal predecessors, (126), 38 states have call successors, (38), 15 states have call predecessors, (38), 19 states have return successors, (51), 36 states have call predecessors, (51), 37 states have call successors, (51) [2022-11-16 16:22:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2022-11-16 16:22:31,178 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 50 [2022-11-16 16:22:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:22:31,178 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2022-11-16 16:22:31,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 16:22:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2022-11-16 16:22:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 16:22:31,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:22:31,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:22:31,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:31,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:31,380 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash -729235663, now seen corresponding path program 1 times [2022-11-16 16:22:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:22:31,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344877495] [2022-11-16 16:22:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:31,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:22:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 16:22:31,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:22:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344877495] [2022-11-16 16:22:31,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344877495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:22:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240943572] [2022-11-16 16:22:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:31,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:22:31,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:22:31,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 16:22:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:22:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 16:22:31,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:22:31,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240943572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:22:31,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:22:31,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-16 16:22:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099471288] [2022-11-16 16:22:31,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:22:31,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:22:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:22:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:22:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:22:31,931 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 16:22:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:22:32,232 INFO L93 Difference]: Finished difference Result 254 states and 346 transitions. [2022-11-16 16:22:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:22:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-16 16:22:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:22:32,244 INFO L225 Difference]: With dead ends: 254 [2022-11-16 16:22:32,244 INFO L226 Difference]: Without dead ends: 177 [2022-11-16 16:22:32,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:22:32,245 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:22:32,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 197 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:22:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-16 16:22:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2022-11-16 16:22:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 107 states have internal predecessors, (121), 38 states have call successors, (38), 15 states have call predecessors, (38), 18 states have return successors, (44), 36 states have call predecessors, (44), 37 states have call successors, (44) [2022-11-16 16:22:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2022-11-16 16:22:32,324 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 52 [2022-11-16 16:22:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:22:32,324 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2022-11-16 16:22:32,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 16:22:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2022-11-16 16:22:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 16:22:32,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:22:32,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:22:32,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 16:22:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:32,532 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 934140056, now seen corresponding path program 1 times [2022-11-16 16:22:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:22:32,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695620952] [2022-11-16 16:22:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:32,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:22:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 16:22:32,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:22:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695620952] [2022-11-16 16:22:32,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695620952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:22:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934898601] [2022-11-16 16:22:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:32,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:22:32,743 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:22:32,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 16:22:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:33,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 16:22:33,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:33,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:22:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 16:22:33,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934898601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:22:33,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987460105] [2022-11-16 16:22:33,309 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:22:33,309 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:22:33,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:22:33,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:22:33,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:22:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,394 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:22:33,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:22:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:22:33,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:22:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:22:33,691 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 [2022-11-16 16:22:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:22:33,765 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 [2022-11-16 16:22:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:22:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:22:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:33,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:22:35,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2022-11-16 16:22:35,431 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-16 16:22:36,034 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-16 16:22:36,035 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:22:36,051 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:22:36,110 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:22:46,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7517#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| Int)) (and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 1) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 16) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 4)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= 0 (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 16)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 0)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (not (= 5 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 24) 0) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 8) 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 8) 0))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:22:46,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:22:46,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:22:46,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-16 16:22:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507602592] [2022-11-16 16:22:46,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:22:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 16:22:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:22:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 16:22:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 16:22:46,307 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand has 16 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-16 16:22:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:22:46,712 INFO L93 Difference]: Finished difference Result 254 states and 342 transitions. [2022-11-16 16:22:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 16:22:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 56 [2022-11-16 16:22:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:22:46,714 INFO L225 Difference]: With dead ends: 254 [2022-11-16 16:22:46,715 INFO L226 Difference]: Without dead ends: 184 [2022-11-16 16:22:46,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 16:22:46,716 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:22:46,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 447 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:22:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-16 16:22:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2022-11-16 16:22:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 110 states have internal predecessors, (122), 38 states have call successors, (38), 15 states have call predecessors, (38), 19 states have return successors, (49), 36 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-16 16:22:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 209 transitions. [2022-11-16 16:22:46,811 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 209 transitions. Word has length 56 [2022-11-16 16:22:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:22:46,812 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 209 transitions. [2022-11-16 16:22:46,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.0) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-16 16:22:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 209 transitions. [2022-11-16 16:22:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 16:22:46,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:22:46,813 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 16:22:46,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 16:22:47,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1607865746, now seen corresponding path program 2 times [2022-11-16 16:22:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:22:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551006550] [2022-11-16 16:22:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:47,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:22:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:22:47,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:22:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551006550] [2022-11-16 16:22:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551006550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:22:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981151469] [2022-11-16 16:22:47,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:22:47,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:47,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:22:47,590 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:22:47,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 16:22:47,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:22:47,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:22:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 16:22:47,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:22:47,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981151469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:22:47,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:22:47,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2022-11-16 16:22:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476261751] [2022-11-16 16:22:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:22:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 16:22:47,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:22:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 16:22:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:22:47,939 INFO L87 Difference]: Start difference. First operand 162 states and 209 transitions. Second operand has 7 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 16:22:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:22:48,185 INFO L93 Difference]: Finished difference Result 246 states and 331 transitions. [2022-11-16 16:22:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:22:48,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-11-16 16:22:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:22:48,191 INFO L225 Difference]: With dead ends: 246 [2022-11-16 16:22:48,191 INFO L226 Difference]: Without dead ends: 176 [2022-11-16 16:22:48,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-16 16:22:48,196 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:22:48,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 252 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:22:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-16 16:22:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2022-11-16 16:22:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 111 states have internal predecessors, (123), 38 states have call successors, (38), 15 states have call predecessors, (38), 19 states have return successors, (49), 36 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-16 16:22:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 210 transitions. [2022-11-16 16:22:48,298 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 210 transitions. Word has length 58 [2022-11-16 16:22:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:22:48,299 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 210 transitions. [2022-11-16 16:22:48,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 16:22:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 210 transitions. [2022-11-16 16:22:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 16:22:48,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:22:48,305 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-11-16 16:22:48,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:48,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash 751559192, now seen corresponding path program 2 times [2022-11-16 16:22:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:22:48,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262500490] [2022-11-16 16:22:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:22:48,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:22:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:22:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 16:22:51,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:22:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262500490] [2022-11-16 16:22:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262500490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:22:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590027649] [2022-11-16 16:22:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:22:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:22:51,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:22:51,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 16:22:51,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:22:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 16:22:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:22:59,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:23:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:23:03,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590027649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:23:03,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229035301] [2022-11-16 16:23:03,417 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:23:03,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:23:03,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:23:03,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:23:03,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:23:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,497 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:23:03,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:23:03,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:23:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:23:03,751 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 [2022-11-16 16:23:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:23:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:23:03,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:23:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:23:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:23:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:03,936 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 [2022-11-16 16:23:05,483 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2022-11-16 16:23:05,560 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-16 16:23:06,243 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-16 16:23:06,244 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:23:06,265 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:23:06,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:23:19,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9339#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 24)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| 3)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| 5)) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 24)) 0)) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 24)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| 0)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| 4)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 1) (= 16 (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 24)) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 16) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 24) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| 2)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) 8) 0))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:23:19,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:23:19,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:23:19,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 7] total 28 [2022-11-16 16:23:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938683861] [2022-11-16 16:23:19,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:23:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 16:23:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:23:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 16:23:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2637, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 16:23:19,136 INFO L87 Difference]: Start difference. First operand 163 states and 210 transitions. Second operand has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-16 16:23:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:23:28,474 INFO L93 Difference]: Finished difference Result 282 states and 389 transitions. [2022-11-16 16:23:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 16:23:28,475 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 59 [2022-11-16 16:23:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:23:28,476 INFO L225 Difference]: With dead ends: 282 [2022-11-16 16:23:28,477 INFO L226 Difference]: Without dead ends: 218 [2022-11-16 16:23:28,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=692, Invalid=6113, Unknown=1, NotChecked=0, Total=6806 [2022-11-16 16:23:28,483 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 100 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:23:28,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 540 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 995 Invalid, 0 Unknown, 77 Unchecked, 1.1s Time] [2022-11-16 16:23:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-16 16:23:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2022-11-16 16:23:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 41 states have call successors, (41), 17 states have call predecessors, (41), 22 states have return successors, (64), 39 states have call predecessors, (64), 40 states have call successors, (64) [2022-11-16 16:23:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 244 transitions. [2022-11-16 16:23:28,595 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 244 transitions. Word has length 59 [2022-11-16 16:23:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:23:28,596 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 244 transitions. [2022-11-16 16:23:28,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-16 16:23:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 244 transitions. [2022-11-16 16:23:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 16:23:28,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:23:28,598 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:23:28,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 16:23:28,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 16:23:28,804 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:23:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:23:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1776148813, now seen corresponding path program 1 times [2022-11-16 16:23:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:23:28,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73705740] [2022-11-16 16:23:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:23:28,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:23:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:23:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 16:23:31,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:23:31,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73705740] [2022-11-16 16:23:31,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73705740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:23:31,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396706287] [2022-11-16 16:23:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:23:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:23:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:23:31,482 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:23:31,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 16:23:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:23:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-16 16:23:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:23:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:23:35,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:23:40,673 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 16:23:40,673 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-11-16 16:23:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396706287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:23:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702667829] [2022-11-16 16:23:40,796 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:23:40,797 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:23:40,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:23:40,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:23:40,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:23:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:40,863 INFO L321 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-16 16:23:40,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-16 16:23:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:40,937 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:23:40,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:23:41,171 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 [2022-11-16 16:23:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:23:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:23:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:23:41,303 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 [2022-11-16 16:23:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:23:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:23:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:23:41,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:23:52,002 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 149 for LOIs [2022-11-16 16:23:52,303 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-16 16:23:52,917 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2022-11-16 16:23:52,957 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:23:52,978 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:23:53,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:24:13,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10427#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86| Int)) (and (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (not (= 5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 0) 16) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 24) 0) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 8) 0) (= (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 32) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|))) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:24:13,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:24:13,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:24:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 42 [2022-11-16 16:24:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556606836] [2022-11-16 16:24:13,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:24:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 16:24:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:24:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 16:24:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=5568, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 16:24:13,419 INFO L87 Difference]: Start difference. First operand 182 states and 244 transitions. Second operand has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-16 16:24:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:24:17,771 INFO L93 Difference]: Finished difference Result 305 states and 416 transitions. [2022-11-16 16:24:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 16:24:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-11-16 16:24:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:24:17,773 INFO L225 Difference]: With dead ends: 305 [2022-11-16 16:24:17,774 INFO L226 Difference]: Without dead ends: 269 [2022-11-16 16:24:17,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=804, Invalid=10752, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 16:24:17,777 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 121 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:24:17,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1117 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1539 Invalid, 0 Unknown, 393 Unchecked, 1.4s Time] [2022-11-16 16:24:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-16 16:24:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 219. [2022-11-16 16:24:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 142 states have (on average 1.176056338028169) internal successors, (167), 150 states have internal predecessors, (167), 50 states have call successors, (50), 20 states have call predecessors, (50), 26 states have return successors, (65), 48 states have call predecessors, (65), 49 states have call successors, (65) [2022-11-16 16:24:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 282 transitions. [2022-11-16 16:24:17,930 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 282 transitions. Word has length 67 [2022-11-16 16:24:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:24:17,930 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 282 transitions. [2022-11-16 16:24:17,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-16 16:24:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 282 transitions. [2022-11-16 16:24:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 16:24:17,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:24:17,932 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:24:17,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 16:24:18,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 16:24:18,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:24:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:24:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -421048184, now seen corresponding path program 1 times [2022-11-16 16:24:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:24:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545351797] [2022-11-16 16:24:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:24:18,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:24:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:24:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 16:24:19,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:24:19,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545351797] [2022-11-16 16:24:19,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545351797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:24:19,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313389223] [2022-11-16 16:24:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:24:19,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:24:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:24:19,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:24:19,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 16:24:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:24:19,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 16:24:19,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:24:19,997 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 [2022-11-16 16:24:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:20,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:24:20,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:20,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 16:24:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:20,048 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 16 treesize of output 20 [2022-11-16 16:24:20,380 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:24:20,380 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 12 [2022-11-16 16:24:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 16:24:20,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:24:20,731 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1468 (Array Int Int)) (v_ArrVal_1467 (Array Int Int)) (v_ArrVal_1469 Int)) (not (= (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1468) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1467) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1469)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2022-11-16 16:24:20,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:24:20,742 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 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 16:24:20,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:24:20,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-11-16 16:24:20,769 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 148 treesize of output 144 [2022-11-16 16:24:20,777 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 144 treesize of output 142 [2022-11-16 16:24:20,858 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 6 treesize of output 4 [2022-11-16 16:24:20,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:24:20,874 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 61 treesize of output 65 [2022-11-16 16:24:20,879 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 48 treesize of output 46 [2022-11-16 16:24:20,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:24:20,908 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 20 treesize of output 24 [2022-11-16 16:24:20,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:24:20,929 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 72 treesize of output 72 [2022-11-16 16:24:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 1 not checked. [2022-11-16 16:24:21,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313389223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:24:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16118114] [2022-11-16 16:24:21,159 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:24:21,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:24:21,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:24:21,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:24:21,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:24:21,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,251 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:24:21,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:24:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:24:21,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:24:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:24:21,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:24:21,644 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 [2022-11-16 16:24:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:24:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:24:21,724 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 16:24:21,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-16 16:24:21,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:24:21,778 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 16:24:21,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-16 16:24:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,813 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 35 treesize of output 7 [2022-11-16 16:24:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,897 INFO L321 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-16 16:24:21,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-16 16:24:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,938 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 50 treesize of output 28 [2022-11-16 16:24:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,040 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:24:22,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-16 16:24:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,108 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 [2022-11-16 16:24:22,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,133 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 59 treesize of output 13 [2022-11-16 16:24:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,153 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 59 treesize of output 13 [2022-11-16 16:24:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:24:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,167 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 [2022-11-16 16:24:22,183 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 [2022-11-16 16:24:22,195 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 [2022-11-16 16:24:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,229 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 [2022-11-16 16:24:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,255 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 [2022-11-16 16:24:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,271 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 [2022-11-16 16:24:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:24:22,300 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 [2022-11-16 16:24:23,613 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-16 16:24:23,625 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 59 for LOIs [2022-11-16 16:24:25,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-16 16:24:25,080 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:24:25,099 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:24:25,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:24:32,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11725#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:24:32,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:24:32,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:24:32,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-11-16 16:24:32,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077879750] [2022-11-16 16:24:32,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:24:32,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 16:24:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:24:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 16:24:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3077, Unknown=1, NotChecked=112, Total=3422 [2022-11-16 16:24:32,852 INFO L87 Difference]: Start difference. First operand 219 states and 282 transitions. Second operand has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-16 16:24:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:24:34,276 INFO L93 Difference]: Finished difference Result 301 states and 385 transitions. [2022-11-16 16:24:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 16:24:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 68 [2022-11-16 16:24:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:24:34,278 INFO L225 Difference]: With dead ends: 301 [2022-11-16 16:24:34,278 INFO L226 Difference]: Without dead ends: 243 [2022-11-16 16:24:34,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=338, Invalid=4221, Unknown=1, NotChecked=132, Total=4692 [2022-11-16 16:24:34,280 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 150 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:24:34,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 738 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 825 Invalid, 0 Unknown, 246 Unchecked, 0.8s Time] [2022-11-16 16:24:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-16 16:24:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 207. [2022-11-16 16:24:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 138 states have (on average 1.181159420289855) internal successors, (163), 146 states have internal predecessors, (163), 42 states have call successors, (42), 20 states have call predecessors, (42), 26 states have return successors, (57), 40 states have call predecessors, (57), 41 states have call successors, (57) [2022-11-16 16:24:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 262 transitions. [2022-11-16 16:24:34,395 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 262 transitions. Word has length 68 [2022-11-16 16:24:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:24:34,396 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 262 transitions. [2022-11-16 16:24:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-16 16:24:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 262 transitions. [2022-11-16 16:24:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 16:24:34,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:24:34,397 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:24:34,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-16 16:24:34,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 16:24:34,604 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:24:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:24:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash 108475031, now seen corresponding path program 2 times [2022-11-16 16:24:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:24:34,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398115060] [2022-11-16 16:24:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:24:34,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:24:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:24:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-16 16:24:34,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:24:34,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398115060] [2022-11-16 16:24:34,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398115060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:24:34,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961174273] [2022-11-16 16:24:34,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:24:34,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:24:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:24:34,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:24:34,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 16:24:35,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:24:35,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:24:35,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:24:35,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:24:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 16:24:35,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:24:35,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961174273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:24:35,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 16:24:35,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-16 16:24:35,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953149632] [2022-11-16 16:24:35,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:24:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:24:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:24:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:24:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:24:35,265 INFO L87 Difference]: Start difference. First operand 207 states and 262 transitions. Second operand has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:24:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:24:35,502 INFO L93 Difference]: Finished difference Result 318 states and 410 transitions. [2022-11-16 16:24:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:24:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-11-16 16:24:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:24:35,504 INFO L225 Difference]: With dead ends: 318 [2022-11-16 16:24:35,504 INFO L226 Difference]: Without dead ends: 222 [2022-11-16 16:24:35,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:24:35,505 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:24:35,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 220 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:24:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-16 16:24:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 207. [2022-11-16 16:24:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 146 states have internal predecessors, (161), 42 states have call successors, (42), 20 states have call predecessors, (42), 26 states have return successors, (57), 40 states have call predecessors, (57), 41 states have call successors, (57) [2022-11-16 16:24:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2022-11-16 16:24:35,648 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 71 [2022-11-16 16:24:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:24:35,648 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2022-11-16 16:24:35,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 16:24:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2022-11-16 16:24:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 16:24:35,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:24:35,651 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:24:35,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:24:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 16:24:35,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:24:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:24:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1989271983, now seen corresponding path program 1 times [2022-11-16 16:24:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:24:35,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796873844] [2022-11-16 16:24:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:24:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:24:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:24:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-16 16:24:36,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:24:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796873844] [2022-11-16 16:24:36,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796873844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:24:36,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:24:36,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 16:24:36,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281444196] [2022-11-16 16:24:36,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:24:36,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:24:36,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:24:36,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:24:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:24:36,082 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-16 16:24:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:24:36,358 INFO L93 Difference]: Finished difference Result 227 states and 283 transitions. [2022-11-16 16:24:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 16:24:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-16 16:24:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:24:36,360 INFO L225 Difference]: With dead ends: 227 [2022-11-16 16:24:36,360 INFO L226 Difference]: Without dead ends: 225 [2022-11-16 16:24:36,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:24:36,363 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:24:36,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 288 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:24:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-16 16:24:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 218. [2022-11-16 16:24:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 153 states have internal predecessors, (167), 45 states have call successors, (45), 21 states have call predecessors, (45), 28 states have return successors, (61), 43 states have call predecessors, (61), 44 states have call successors, (61) [2022-11-16 16:24:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 273 transitions. [2022-11-16 16:24:36,474 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 273 transitions. Word has length 70 [2022-11-16 16:24:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:24:36,474 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 273 transitions. [2022-11-16 16:24:36,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-16 16:24:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 273 transitions. [2022-11-16 16:24:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 16:24:36,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:24:36,476 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:24:36,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 16:24:36,476 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:24:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:24:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2027580686, now seen corresponding path program 2 times [2022-11-16 16:24:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:24:36,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320761966] [2022-11-16 16:24:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:24:36,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:24:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:24:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 16:24:37,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:24:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320761966] [2022-11-16 16:24:37,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320761966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:24:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321405905] [2022-11-16 16:24:37,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:24:37,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:24:37,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:24:37,908 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:24:37,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 16:24:38,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:24:38,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:24:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 16:24:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:24:38,348 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:24:38,349 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 9 treesize of output 15 [2022-11-16 16:24:38,362 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:24:38,362 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 9 treesize of output 15 [2022-11-16 16:25:03,212 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:25:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:25:03,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 16:25:04,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321405905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616154754] [2022-11-16 16:25:04,346 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:25:04,346 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:25:04,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:25:04,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:25:04,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:25:04,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,435 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:25:04,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:25:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:25:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:25:04,690 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 [2022-11-16 16:25:04,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:25:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:25:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:25:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:25:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,845 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 [2022-11-16 16:25:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:04,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:25:14,875 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 149 for LOIs [2022-11-16 16:25:15,137 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-16 16:25:15,805 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2022-11-16 16:25:15,845 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:25:15,863 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:25:15,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:25:34,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14632#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |#NULL.base|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 16) 0) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 1) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 24) 0) (not (= 5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 8) 0) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_203|) 0)))) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-16 16:25:34,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:25:34,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:25:34,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 13] total 40 [2022-11-16 16:25:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365758629] [2022-11-16 16:25:34,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:25:34,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 16:25:34,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:25:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 16:25:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=4117, Unknown=7, NotChecked=0, Total=4556 [2022-11-16 16:25:34,635 INFO L87 Difference]: Start difference. First operand 218 states and 273 transitions. Second operand has 40 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 39 states have internal predecessors, (96), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-16 16:25:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:56,661 INFO L93 Difference]: Finished difference Result 475 states and 635 transitions. [2022-11-16 16:25:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 16:25:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 39 states have internal predecessors, (96), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) Word has length 73 [2022-11-16 16:25:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:56,665 INFO L225 Difference]: With dead ends: 475 [2022-11-16 16:25:56,665 INFO L226 Difference]: Without dead ends: 328 [2022-11-16 16:25:56,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 180 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 63.5s TimeCoverageRelationStatistics Valid=812, Invalid=7544, Unknown=16, NotChecked=0, Total=8372 [2022-11-16 16:25:56,667 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 298 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:56,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1314 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2110 Invalid, 0 Unknown, 496 Unchecked, 2.3s Time] [2022-11-16 16:25:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-16 16:25:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 248. [2022-11-16 16:25:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 165 states have (on average 1.1454545454545455) internal successors, (189), 175 states have internal predecessors, (189), 49 states have call successors, (49), 25 states have call predecessors, (49), 33 states have return successors, (64), 47 states have call predecessors, (64), 48 states have call successors, (64) [2022-11-16 16:25:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 302 transitions. [2022-11-16 16:25:56,824 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 302 transitions. Word has length 73 [2022-11-16 16:25:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:56,825 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 302 transitions. [2022-11-16 16:25:56,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 39 states have internal predecessors, (96), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-16 16:25:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 302 transitions. [2022-11-16 16:25:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 16:25:56,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:56,827 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:25:56,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:25:57,034 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:25:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash 347135943, now seen corresponding path program 3 times [2022-11-16 16:25:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:25:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580097367] [2022-11-16 16:25:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:57,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:25:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 16:25:58,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:25:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580097367] [2022-11-16 16:25:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580097367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:25:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212527810] [2022-11-16 16:25:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:25:58,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:25:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:25:58,346 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:25:58,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 16:25:58,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:25:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:25:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 16:25:58,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:58,856 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:25:58,856 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 9 treesize of output 15 [2022-11-16 16:25:58,869 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 16:25:58,870 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 9 treesize of output 15 [2022-11-16 16:26:01,044 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|))))) is different from true [2022-11-16 16:26:03,162 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_261| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_261|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_261| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_261| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_261|) 0))))) is different from true [2022-11-16 16:26:05,277 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91|) 0))))) is different from true [2022-11-16 16:26:15,353 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:26:29,453 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:26:39,555 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:26:49,717 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:26:57,837 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:26:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-16 16:26:57,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 16:27:00,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212527810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:00,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573807367] [2022-11-16 16:27:00,803 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:27:00,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:27:00,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:27:00,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:27:00,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:27:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:00,882 INFO L321 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-16 16:27:00,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-16 16:27:00,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:00,960 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:27:00,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:27:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:27:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:27:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:27:01,294 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 [2022-11-16 16:27:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,435 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:27:01,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-16 16:27:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:27:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-16 16:27:01,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:27:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-16 16:27:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:01,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:27:01,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:01,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:01,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:01,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:01,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:01,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:02,106 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-16 16:27:02,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 698 treesize of output 707 [2022-11-16 16:27:02,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:02,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:02,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:02,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:02,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:02,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:02,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:02,491 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-16 16:27:02,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 712 treesize of output 721 [2022-11-16 16:27:02,714 INFO L321 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2022-11-16 16:27:02,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 679 treesize of output 691 [2022-11-16 16:27:02,982 INFO L321 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2022-11-16 16:27:02,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 682 treesize of output 701 [2022-11-16 16:27:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:03,051 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-16 16:27:03,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 714 treesize of output 667 [2022-11-16 16:27:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:03,085 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 0 case distinctions, treesize of input 688 treesize of output 667 [2022-11-16 16:27:26,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:26,776 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 [2022-11-16 16:27:27,312 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 [2022-11-16 16:27:27,323 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 [2022-11-16 16:27:27,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:27:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,343 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 [2022-11-16 16:27:27,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,361 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 41 treesize of output 23 [2022-11-16 16:27:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,379 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 [2022-11-16 16:27:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,397 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 [2022-11-16 16:27:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,423 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 [2022-11-16 16:27:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,434 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 [2022-11-16 16:27:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,445 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 [2022-11-16 16:27:27,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:27,463 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 [2022-11-16 16:27:28,939 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-11-16 16:27:28,999 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-16 16:27:29,650 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 141 for LOIs [2022-11-16 16:27:29,693 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:27:29,711 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:27:29,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:27:45,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16262#(and (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 5 |~#s_can_fail_allocator_static~0.base|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 24)) 0) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 24)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_227|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_223| 0))) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-16 16:27:45,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:27:45,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:27:45,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 14] total 40 [2022-11-16 16:27:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345288124] [2022-11-16 16:27:45,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:27:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 16:27:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:27:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 16:27:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3859, Unknown=13, NotChecked=384, Total=4556 [2022-11-16 16:27:45,843 INFO L87 Difference]: Start difference. First operand 248 states and 302 transitions. Second operand has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 38 states have internal predecessors, (105), 18 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (29), 13 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-16 16:28:29,398 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:28:39,494 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:28:55,628 WARN L233 SmtUtils]: Spent 16.09s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:29:05,704 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:29:07,712 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_91|) 0))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|)))))) is different from true [2022-11-16 16:29:17,832 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:29:37,985 WARN L233 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 42 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:29:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:43,325 INFO L93 Difference]: Finished difference Result 391 states and 483 transitions. [2022-11-16 16:29:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 16:29:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 38 states have internal predecessors, (105), 18 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (29), 13 states have call predecessors, (29), 18 states have call successors, (29) Word has length 74 [2022-11-16 16:29:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:43,327 INFO L225 Difference]: With dead ends: 391 [2022-11-16 16:29:43,327 INFO L226 Difference]: Without dead ends: 266 [2022-11-16 16:29:43,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 182 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 193.0s TimeCoverageRelationStatistics Valid=555, Invalid=6907, Unknown=36, NotChecked=692, Total=8190 [2022-11-16 16:29:43,330 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 226 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 648 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:43,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 841 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1488 Invalid, 0 Unknown, 648 Unchecked, 1.6s Time] [2022-11-16 16:29:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-16 16:29:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 230. [2022-11-16 16:29:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.135483870967742) internal successors, (176), 160 states have internal predecessors, (176), 45 states have call successors, (45), 26 states have call predecessors, (45), 29 states have return successors, (53), 43 states have call predecessors, (53), 44 states have call successors, (53) [2022-11-16 16:29:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 274 transitions. [2022-11-16 16:29:43,464 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 274 transitions. Word has length 74 [2022-11-16 16:29:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:43,465 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 274 transitions. [2022-11-16 16:29:43,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 38 states have internal predecessors, (105), 18 states have call successors, (30), 5 states have call predecessors, (30), 9 states have return successors, (29), 13 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-16 16:29:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 274 transitions. [2022-11-16 16:29:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 16:29:43,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:43,467 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:29:43,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 16:29:43,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 16:29:43,675 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:29:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1010269368, now seen corresponding path program 1 times [2022-11-16 16:29:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:29:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185538394] [2022-11-16 16:29:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:29:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 16:29:44,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:29:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185538394] [2022-11-16 16:29:44,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185538394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:29:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114426655] [2022-11-16 16:29:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:29:44,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:44,943 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:44,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 16:29:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:29:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 16:29:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:12,643 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:30:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 16:30:14,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:15,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:30:15,729 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 [2022-11-16 16:30:15,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:30:15,740 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 [2022-11-16 16:30:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 16:30:15,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114426655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:15,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433890031] [2022-11-16 16:30:15,814 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-16 16:30:15,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:30:15,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:30:15,815 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:30:15,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:30:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:15,905 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 16:30:15,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-16 16:30:15,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:15,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-16 16:30:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:30:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-16 16:30:16,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-16 16:30:16,231 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 [2022-11-16 16:30:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-16 16:30:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-16 16:30:16,329 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 [2022-11-16 16:30:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:16,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-16 16:30:27,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 157 for LOIs [2022-11-16 16:30:27,375 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 149 for LOIs [2022-11-16 16:30:28,758 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2022-11-16 16:30:28,798 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-16 16:30:28,819 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-16 16:30:28,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:30:49,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17739#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153| Int) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| 0)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| 3)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|)) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) (- 8))) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| 4)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|)) 0) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| 2)) (= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) (- 8)))) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|)) (= (select |#length| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) 32) (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) 8))) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_153| 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_115| 5)))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 16:30:49,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:30:49,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 16:30:49,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 38 [2022-11-16 16:30:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091449077] [2022-11-16 16:30:49,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 16:30:49,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 16:30:49,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:30:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 16:30:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3893, Unknown=8, NotChecked=0, Total=4290 [2022-11-16 16:30:49,515 INFO L87 Difference]: Start difference. First operand 230 states and 274 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 34 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-16 16:31:17,428 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:31:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:18,354 INFO L93 Difference]: Finished difference Result 320 states and 390 transitions. [2022-11-16 16:31:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 16:31:18,355 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 34 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) Word has length 75 [2022-11-16 16:31:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:18,357 INFO L225 Difference]: With dead ends: 320 [2022-11-16 16:31:18,357 INFO L226 Difference]: Without dead ends: 277 [2022-11-16 16:31:18,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 178 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 77.6s TimeCoverageRelationStatistics Valid=702, Invalid=7472, Unknown=16, NotChecked=0, Total=8190 [2022-11-16 16:31:18,359 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 195 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:18,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1349 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1250 Invalid, 0 Unknown, 291 Unchecked, 1.2s Time] [2022-11-16 16:31:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-16 16:31:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 225. [2022-11-16 16:31:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 152 states have (on average 1.131578947368421) internal successors, (172), 156 states have internal predecessors, (172), 44 states have call successors, (44), 26 states have call predecessors, (44), 28 states have return successors, (51), 42 states have call predecessors, (51), 43 states have call successors, (51) [2022-11-16 16:31:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 267 transitions. [2022-11-16 16:31:18,486 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 267 transitions. Word has length 75 [2022-11-16 16:31:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:18,487 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 267 transitions. [2022-11-16 16:31:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 34 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-16 16:31:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 267 transitions. [2022-11-16 16:31:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 16:31:18,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:18,489 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:18,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 16:31:18,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 16:31:18,696 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1259967279, now seen corresponding path program 1 times [2022-11-16 16:31:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:18,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430501171] [2022-11-16 16:31:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-16 16:31:19,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:19,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430501171] [2022-11-16 16:31:19,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430501171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:19,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:31:19,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 16:31:19,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176031766] [2022-11-16 16:31:19,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:19,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:31:19,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:31:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:31:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:31:19,031 INFO L87 Difference]: Start difference. First operand 225 states and 267 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 16:31:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:19,319 INFO L93 Difference]: Finished difference Result 231 states and 272 transitions. [2022-11-16 16:31:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:31:19,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-16 16:31:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:19,322 INFO L225 Difference]: With dead ends: 231 [2022-11-16 16:31:19,322 INFO L226 Difference]: Without dead ends: 229 [2022-11-16 16:31:19,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:31:19,323 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:19,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:31:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-16 16:31:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-11-16 16:31:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 155 states have (on average 1.1290322580645162) internal successors, (175), 159 states have internal predecessors, (175), 44 states have call successors, (44), 27 states have call predecessors, (44), 29 states have return successors, (51), 42 states have call predecessors, (51), 43 states have call successors, (51) [2022-11-16 16:31:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 270 transitions. [2022-11-16 16:31:19,442 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 270 transitions. Word has length 76 [2022-11-16 16:31:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:19,442 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 270 transitions. [2022-11-16 16:31:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 16:31:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 270 transitions. [2022-11-16 16:31:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 16:31:19,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:19,444 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 16:31:19,444 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:31:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1891220550, now seen corresponding path program 4 times [2022-11-16 16:31:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:31:19,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527673523] [2022-11-16 16:31:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:31:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 16:31:22,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:31:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527673523] [2022-11-16 16:31:22,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527673523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 16:31:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662376576] [2022-11-16 16:31:22,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:31:22,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:31:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:31:22,893 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:31:22,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c85eb0-8eb0-4cdb-8796-f671f681dede/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 16:31:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-16 16:31:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,534 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 27 treesize of output 15 [2022-11-16 16:31:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 16:31:23,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-16 16:31:23,567 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 8 treesize of output 7 [2022-11-16 16:31:23,574 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 8 treesize of output 7 [2022-11-16 16:31:23,670 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-16 16:31:23,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 117 [2022-11-16 16:31:23,692 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-16 16:31:23,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 122 [2022-11-16 16:31:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,704 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 98 treesize of output 86 [2022-11-16 16:31:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 47 [2022-11-16 16:31:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,724 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 18 treesize of output 26 [2022-11-16 16:31:23,732 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 16 treesize of output 15 [2022-11-16 16:31:23,741 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 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-16 16:31:23,745 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 13 treesize of output 9 [2022-11-16 16:31:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 16:31:29,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:41,779 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse3 (select .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)) (.cse4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_2062 Int) (v_ArrVal_2058 Int) (v_ArrVal_2055 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_2058)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2055) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 v_ArrVal_2062)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse0 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| (let ((.cse1 (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store .cse3 .cse4 v_ArrVal_2061)))) (select (select .cse1 .cse0) (+ 8 (select (select .cse1 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))))))) (forall ((v_ArrVal_2062 Int) (v_ArrVal_2058 Int) (v_ArrVal_2055 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse6 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_2058)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2055) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 v_ArrVal_2062)))) (let ((.cse7 (select (select .cse6 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select .cse6 .cse7) (+ 8 (select (select (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store .cse3 .cse4 v_ArrVal_2061)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) (= .cse7 0))))) (forall ((v_ArrVal_2062 Int) (v_ArrVal_2058 Int) (v_ArrVal_2055 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse8 (select (select (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store .cse3 .cse4 v_ArrVal_2061)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse8 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (let ((.cse9 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_2058)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2055) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 v_ArrVal_2062)))) (select .cse9 (select (select .cse9 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (+ 8 .cse8)))))) (forall ((v_ArrVal_2062 Int) (v_ArrVal_2058 Int) (v_ArrVal_2055 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse11 (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store .cse3 .cse4 v_ArrVal_2061)))) (let ((.cse10 (select (select .cse11 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse10 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| (select (select .cse11 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_2058)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2055) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 v_ArrVal_2062)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)) (+ 8 .cse10))))))) (or (and (forall ((v_ArrVal_2062 Int) (v_ArrVal_2058 Int) (v_ArrVal_2055 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_2058)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2055) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse4 v_ArrVal_2062)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)) (forall ((v_ArrVal_2061 Int)) (= (select (select (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store .cse3 .cse4 v_ArrVal_2061)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0)))))) is different from false [2022-11-16 16:31:49,075 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 24 DAG size of output: 21 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 16:31:49,076 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-16 16:31:49,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1898 treesize of output 1603 [2022-11-16 16:31:49,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:32:06,870 WARN L233 SmtUtils]: Spent 17.75s on a formula simplification. DAG size of input: 119 DAG size of output: 86 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 16:32:06,871 INFO L321 Elim1Store]: treesize reduction 240, result has 42.7 percent of original size [2022-11-16 16:32:06,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 1574 treesize of output 1543 [2022-11-16 16:32:07,336 INFO L217 Elim1Store]: Index analysis took 319 ms