./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI --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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- 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-5e519f3 [2022-11-03 02:29:46,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:29:47,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:29:47,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:29:47,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:29:47,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:29:47,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:29:47,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:29:47,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:29:47,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:29:47,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:29:47,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:29:47,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:29:47,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:29:47,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:29:47,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:29:47,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:29:47,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:29:47,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:29:47,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:29:47,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:29:47,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:29:47,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:29:47,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:29:47,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:29:47,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:29:47,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:29:47,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:29:47,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:29:47,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:29:47,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:29:47,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:29:47,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:29:47,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:29:47,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:29:47,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:29:47,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:29:47,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:29:47,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:29:47,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:29:47,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:29:47,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:29:47,156 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:29:47,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:29:47,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:29:47,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:29:47,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:29:47,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:29:47,159 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:29:47,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:29:47,159 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:29:47,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:29:47,160 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:29:47,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:29:47,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:29:47,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:29:47,161 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:29:47,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:29:47,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:29:47,162 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:29:47,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:29:47,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:29:47,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:29:47,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:29:47,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:29:47,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:29:47,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:29:47,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:29:47,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:29:47,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:29:47,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:29:47,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:47,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:29:47,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:29:47,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:29:47,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:29:47,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:29:47,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:29:47,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:29:47,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:29:47,169 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_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-11-03 02:29:47,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:29:47,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:29:47,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:29:47,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:29:47,459 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:29:47,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-03 02:29:47,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/data/cbd1ea628/24cf7ac68e2942138cb54f139a0e89b4/FLAGb3a7468d8 [2022-11-03 02:29:48,265 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:29:48,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-03 02:29:48,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/data/cbd1ea628/24cf7ac68e2942138cb54f139a0e89b4/FLAGb3a7468d8 [2022-11-03 02:29:48,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/data/cbd1ea628/24cf7ac68e2942138cb54f139a0e89b4 [2022-11-03 02:29:48,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:29:48,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:29:48,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:48,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:29:48,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:29:48,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:48" (1/1) ... [2022-11-03 02:29:48,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ce2877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:48, skipping insertion in model container [2022-11-03 02:29:48,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:48" (1/1) ... [2022-11-03 02:29:48,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:29:48,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:29:48,811 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-03 02:29:48,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-03 02:29:49,903 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,904 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,905 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,906 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,907 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,925 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,926 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,928 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,928 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,930 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,931 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,932 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:49,932 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,281 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:29:50,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:29:50,283 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:29:50,284 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:29:50,286 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:29:50,287 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:29:50,287 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:29:50,288 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:29:50,289 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:29:50,289 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:29:50,433 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:29:50,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:50,473 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:29:50,487 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-03 02:29:50,487 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-03 02:29:50,527 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,527 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,528 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,528 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,529 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,537 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,537 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,538 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,539 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,540 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,541 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,541 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,542 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:29:50,585 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:29:50,586 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:29:50,586 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:29:50,587 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:29:50,588 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:29:50,589 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:29:50,589 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:29:50,590 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:29:50,590 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:29:50,590 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:29:50,635 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:29:50,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:50,959 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:29:50,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50 WrapperNode [2022-11-03 02:29:50,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:50,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:50,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:29:50,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:29:50,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,125 INFO L138 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2022-11-03 02:29:51,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:51,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:29:51,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:29:51,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:29:51,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:29:51,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:29:51,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:29:51,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:29:51,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (1/1) ... [2022-11-03 02:29:51,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:51,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:29:51,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:29:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:29:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:29:51,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:29:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:29:51,292 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:29:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:29:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 02:29:51,293 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 02:29:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:29:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:29:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-11-03 02:29:51,293 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-11-03 02:29:51,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:29:51,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:29:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-03 02:29:51,294 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-03 02:29:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:29:51,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:29:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:29:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:29:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:29:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:29:51,295 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:29:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:29:51,295 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-03 02:29:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:29:51,606 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:29:51,609 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:29:51,883 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:29:52,006 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:29:52,006 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:29:52,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:52 BoogieIcfgContainer [2022-11-03 02:29:52,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:29:52,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:29:52,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:29:52,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:29:52,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:29:48" (1/3) ... [2022-11-03 02:29:52,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602db537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:52, skipping insertion in model container [2022-11-03 02:29:52,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:50" (2/3) ... [2022-11-03 02:29:52,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602db537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:52, skipping insertion in model container [2022-11-03 02:29:52,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:52" (3/3) ... [2022-11-03 02:29:52,017 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-11-03 02:29:52,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:29:52,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:29:52,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:29:52,090 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;@19f0759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:29:52,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:29:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-03 02:29:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:29:52,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:52,104 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:52,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931554, now seen corresponding path program 1 times [2022-11-03 02:29:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:52,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921009945] [2022-11-03 02:29:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:52,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:29:52,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:52,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921009945] [2022-11-03 02:29:52,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921009945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536150701] [2022-11-03 02:29:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:52,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:52,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:52,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:52,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:29:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:29:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:53,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:29:53,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:29:53,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-03 02:29:53,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:53,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-03 02:29:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:29:55,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:55,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536150701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:55,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:55,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-03 02:29:55,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727754916] [2022-11-03 02:29:55,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:55,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:29:55,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:55,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:29:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:29:55,777 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:29:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:56,176 INFO L93 Difference]: Finished difference Result 153 states and 216 transitions. [2022-11-03 02:29:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:29:56,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 52 [2022-11-03 02:29:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:56,197 INFO L225 Difference]: With dead ends: 153 [2022-11-03 02:29:56,197 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:29:56,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:29:56,211 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 12 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:56,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 266 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-03 02:29:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:29:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-11-03 02:29:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 43 states have internal predecessors, (50), 29 states have call successors, (29), 12 states have call predecessors, (29), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-03 02:29:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2022-11-03 02:29:56,288 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 52 [2022-11-03 02:29:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:56,289 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2022-11-03 02:29:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:29:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2022-11-03 02:29:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:29:56,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:56,296 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:56,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:29:56,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1311656922, now seen corresponding path program 1 times [2022-11-03 02:29:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:56,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74688775] [2022-11-03 02:29:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:29:56,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74688775] [2022-11-03 02:29:56,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74688775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:56,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935408247] [2022-11-03 02:29:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:56,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:56,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:29:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:29:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:57,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:29:57,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:29:57,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:29:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:29:57,461 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:29:57,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:29:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-03 02:29:57,494 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:29:57,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 02:29:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:29:57,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:29:57,695 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:29:57,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_73| input size 62 context size 62 output size 62 [2022-11-03 02:29:57,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687812025] [2022-11-03 02:29:57,728 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:29:57,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:57,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:57,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:57,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,865 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:29:57,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:29:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:57,966 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:29:57,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:29:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:29:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:29:58,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:29:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:29:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,633 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:29:58,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:29:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:29:58,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:29:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:58,775 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:29:58,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:29:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:58,857 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:29:58,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:29:58,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,001 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:29:59,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:29:59,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:29:59,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:29:59,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:29:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:29:59,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:29:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:29:59,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:29:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:29:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:29:59,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:29:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:29:59,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:30:00,669 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-03 02:30:01,068 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 44 for LOIs [2022-11-03 02:30:01,178 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-03 02:30:01,484 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-03 02:30:01,523 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:30:01,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:06,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [687812025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:06,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:06,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 25 [2022-11-03 02:30:06,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212575259] [2022-11-03 02:30:06,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:06,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:30:06,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:30:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:30:06,697 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 02:30:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:07,070 INFO L93 Difference]: Finished difference Result 145 states and 186 transitions. [2022-11-03 02:30:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:30:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2022-11-03 02:30:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:07,073 INFO L225 Difference]: With dead ends: 145 [2022-11-03 02:30:07,073 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 02:30:07,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:30:07,074 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 18 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:07,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 448 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 89 Invalid, 0 Unknown, 274 Unchecked, 0.3s Time] [2022-11-03 02:30:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 02:30:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-11-03 02:30:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 43 states have (on average 1.186046511627907) internal successors, (51), 44 states have internal predecessors, (51), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:30:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-11-03 02:30:07,112 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 53 [2022-11-03 02:30:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:07,113 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-11-03 02:30:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 02:30:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-11-03 02:30:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:30:07,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:07,118 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:07,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:07,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:30:07,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -662497062, now seen corresponding path program 1 times [2022-11-03 02:30:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:07,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907080906] [2022-11-03 02:30:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:07,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:30:07,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907080906] [2022-11-03 02:30:07,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907080906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129059037] [2022-11-03 02:30:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:07,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:07,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:30:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:30:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:30:07,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:07,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129059037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:07,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:07,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-03 02:30:07,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65554454] [2022-11-03 02:30:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:07,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:30:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:30:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:30:07,906 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:30:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:08,177 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2022-11-03 02:30:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:30:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 54 [2022-11-03 02:30:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:08,179 INFO L225 Difference]: With dead ends: 142 [2022-11-03 02:30:08,179 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 02:30:08,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:08,181 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 45 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:08,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 373 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 02:30:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-03 02:30:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 46 states have internal predecessors, (51), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:30:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-11-03 02:30:08,212 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 54 [2022-11-03 02:30:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:08,212 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-11-03 02:30:08,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:30:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-11-03 02:30:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:30:08,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:08,214 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:08,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:08,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:08,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash 630654178, now seen corresponding path program 1 times [2022-11-03 02:30:08,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:08,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360410682] [2022-11-03 02:30:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:30:08,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360410682] [2022-11-03 02:30:08,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360410682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279187953] [2022-11-03 02:30:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:08,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:08,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:08,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:30:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:30:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:30:09,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:09,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279187953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:09,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:09,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-03 02:30:09,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907765586] [2022-11-03 02:30:09,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:09,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:30:09,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:30:09,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:30:09,086 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:30:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:09,399 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2022-11-03 02:30:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:30:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2022-11-03 02:30:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:09,402 INFO L225 Difference]: With dead ends: 153 [2022-11-03 02:30:09,402 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 02:30:09,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:30:09,404 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:09,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 417 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 02:30:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-11-03 02:30:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:30:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-11-03 02:30:09,436 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 56 [2022-11-03 02:30:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:09,437 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-11-03 02:30:09,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:30:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-11-03 02:30:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:30:09,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:09,444 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:09,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:09,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1929682501, now seen corresponding path program 1 times [2022-11-03 02:30:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:09,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740018974] [2022-11-03 02:30:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:30:09,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740018974] [2022-11-03 02:30:09,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740018974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523898015] [2022-11-03 02:30:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:09,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:10,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:30:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:30:10,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:10,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523898015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:10,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:10,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-03 02:30:10,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822450082] [2022-11-03 02:30:10,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:10,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:10,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:10,201 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:30:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:10,271 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2022-11-03 02:30:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:10,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 57 [2022-11-03 02:30:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:10,273 INFO L225 Difference]: With dead ends: 149 [2022-11-03 02:30:10,273 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:30:10,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:10,275 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:10,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 147 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:30:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-11-03 02:30:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:30:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2022-11-03 02:30:10,326 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 57 [2022-11-03 02:30:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:10,327 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2022-11-03 02:30:10,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:30:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2022-11-03 02:30:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:30:10,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:10,330 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:10,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:10,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:10,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1947211257, now seen corresponding path program 1 times [2022-11-03 02:30:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:10,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356365721] [2022-11-03 02:30:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:30:10,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:10,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356365721] [2022-11-03 02:30:10,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356365721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:10,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129099198] [2022-11-03 02:30:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:10,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:10,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:10,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:10,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:30:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:30:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:30:11,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:11,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129099198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:11,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:11,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 13 [2022-11-03 02:30:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558107536] [2022-11-03 02:30:11,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:11,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:30:11,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:30:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:30:11,350 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 11 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:30:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:11,706 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2022-11-03 02:30:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:30:11,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 60 [2022-11-03 02:30:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:11,709 INFO L225 Difference]: With dead ends: 148 [2022-11-03 02:30:11,709 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:30:11,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:30:11,713 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 18 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:11,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 541 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:30:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:30:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-11-03 02:30:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:30:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2022-11-03 02:30:11,761 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 60 [2022-11-03 02:30:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:11,762 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2022-11-03 02:30:11,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:30:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2022-11-03 02:30:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:30:11,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:11,763 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:11,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:11,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:30:11,988 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1324073265, now seen corresponding path program 1 times [2022-11-03 02:30:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032624272] [2022-11-03 02:30:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:30:13,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:13,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032624272] [2022-11-03 02:30:13,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032624272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:13,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901399352] [2022-11-03 02:30:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:13,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:13,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:13,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:30:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:13,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:30:13,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:13,462 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:30:13,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:30:13,476 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:30:13,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:30:23,817 WARN L234 SmtUtils]: Spent 8.39s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:30:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:30:24,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:30:29,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901399352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951093270] [2022-11-03 02:30:29,027 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:30:29,027 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:29,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:29,028 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:29,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:29,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,113 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:30:29,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:30:29,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,215 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:30:29,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:30:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:30:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:30:29,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:30:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:30:29,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:30:29,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:30:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:30:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:29,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:30:30,393 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 130 for LOIs [2022-11-03 02:30:30,574 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:30:30,576 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:30:30,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [951093270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:45,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:45,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10, 11, 6] total 34 [2022-11-03 02:30:45,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768860907] [2022-11-03 02:30:45,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:45,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:30:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:30:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=976, Unknown=6, NotChecked=0, Total=1122 [2022-11-03 02:30:45,139 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:30:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:46,194 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2022-11-03 02:30:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:30:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 62 [2022-11-03 02:30:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:46,196 INFO L225 Difference]: With dead ends: 154 [2022-11-03 02:30:46,196 INFO L226 Difference]: Without dead ends: 82 [2022-11-03 02:30:46,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=140, Invalid=976, Unknown=6, NotChecked=0, Total=1122 [2022-11-03 02:30:46,198 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 84 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:46,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 218 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 329 Invalid, 0 Unknown, 61 Unchecked, 1.0s Time] [2022-11-03 02:30:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-03 02:30:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-11-03 02:30:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-11-03 02:30:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2022-11-03 02:30:46,221 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 62 [2022-11-03 02:30:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:46,221 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2022-11-03 02:30:46,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:30:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2022-11-03 02:30:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:30:46,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:46,223 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:46,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:46,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:30:46,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash 575582167, now seen corresponding path program 1 times [2022-11-03 02:30:46,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:46,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297012800] [2022-11-03 02:30:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:46,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:30:47,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297012800] [2022-11-03 02:30:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297012800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151301638] [2022-11-03 02:30:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:47,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:47,337 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:47,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:30:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:30:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:47,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:30:47,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:30:47,769 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:30:47,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:30:47,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:30:47,793 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:30:47,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 02:30:47,865 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-03 02:30:47,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_83| input size 44 context size 44 output size 44 [2022-11-03 02:30:47,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686999910] [2022-11-03 02:30:47,868 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:30:47,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:47,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:47,869 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:47,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:47,948 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:30:47,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:30:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,035 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:30:48,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:30:48,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:30:48,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:30:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:30:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:30:48,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:48,480 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:30:48,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:30:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:30:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:48,563 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:30:48,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:30:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,681 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:30:48,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:30:48,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:30:48,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:30:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:30:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:30:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:30:48,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:30:48,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:30:48,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:30:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:30:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:48,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:30:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:49,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:30:50,021 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-03 02:30:50,552 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-11-03 02:30:50,623 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-03 02:30:51,570 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-11-03 02:30:51,590 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:30:51,611 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:30:51,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:57,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [686999910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:57,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:57,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10] total 37 [2022-11-03 02:30:57,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23374935] [2022-11-03 02:30:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:57,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:30:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:30:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:30:57,808 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-03 02:30:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:58,072 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2022-11-03 02:30:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:30:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 63 [2022-11-03 02:30:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:58,074 INFO L225 Difference]: With dead ends: 154 [2022-11-03 02:30:58,074 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 02:30:58,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:30:58,076 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:58,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 312 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-11-03 02:30:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 02:30:58,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-03 02:30:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 52 states have internal predecessors, (59), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-03 02:30:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-11-03 02:30:58,098 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 63 [2022-11-03 02:30:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:58,099 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-11-03 02:30:58,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-03 02:30:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-11-03 02:30:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:30:58,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:58,100 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:58,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:58,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 658052454, now seen corresponding path program 1 times [2022-11-03 02:30:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15954196] [2022-11-03 02:30:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:58,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:30:59,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15954196] [2022-11-03 02:30:59,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15954196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152388083] [2022-11-03 02:30:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:59,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:59,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:30:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:30:59,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:59,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:30:59,942 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:30:59,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 02:30:59,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:30:59,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:59,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:59,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:00,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:00,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 02:31:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:31:00,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:01,031 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_841 Int) (v_ArrVal_838 (Array Int Int)) (v_ArrVal_839 (Array Int Int))) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_838) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_839) |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_841)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|)))) is different from false [2022-11-03 02:31:01,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:31:01,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 02:31:01,074 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:31:01,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 267 treesize of output 277 [2022-11-03 02:31:01,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2022-11-03 02:31:01,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2022-11-03 02:31:01,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:31:01,169 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:31:01,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 77 [2022-11-03 02:31:01,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 8 treesize of output 6 [2022-11-03 02:31:01,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:31:01,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 55 treesize of output 53 [2022-11-03 02:31:01,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-11-03 02:31:01,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152388083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370077791] [2022-11-03 02:31:01,675 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:31:01,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:01,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:01,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:01,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:01,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:01,754 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:31:01,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:31:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:01,844 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:31:01,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:31:02,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:31:02,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:31:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:31:02,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:31:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:02,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:02,295 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:31:02,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:31:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,427 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:31:02,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:31:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:31:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:31:02,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:31:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:31:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:31:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:31:02,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:31:02,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:31:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:31:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:02,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:31:03,746 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-03 02:31:04,537 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-03 02:31:04,895 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 02:31:04,937 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-03 02:31:05,849 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:31:05,851 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:31:05,870 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:31:05,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:25,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4772#(and (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_32 Int)) (and (not (= (mod (ite (= v_aws_linked_list_front_~list.base_BEFORE_CALL_32 0) 0 1) 256) 0)) (not (= (mod (ite (= (ite (= (mod (ite (= 0 (ite (and (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_32) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_32) (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_32) 0))) 1 0)) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= 0 (ite (and (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_32) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_32) (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_32) 0))) 1 0)) 0 1) 1) (<= 0 v_aws_linked_list_front_~list.base_BEFORE_CALL_32) (<= 0 (ite (= 0 (ite (and (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_32) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_32) (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_32) 0))) 1 0)) 0 1)))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 24))) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55|)) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 24))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_57|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_55| 24)))))) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:25,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:25,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:25,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-03 02:31:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848871654] [2022-11-03 02:31:25,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:31:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:31:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4553, Unknown=1, NotChecked=136, Total=4970 [2022-11-03 02:31:25,026 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-03 02:31:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:25,546 INFO L93 Difference]: Finished difference Result 176 states and 221 transitions. [2022-11-03 02:31:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:31:25,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 64 [2022-11-03 02:31:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:25,548 INFO L225 Difference]: With dead ends: 176 [2022-11-03 02:31:25,548 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 02:31:25,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 13 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=320, Invalid=5085, Unknown=1, NotChecked=144, Total=5550 [2022-11-03 02:31:25,551 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 41 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:25,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 609 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 296 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-11-03 02:31:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 02:31:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-11-03 02:31:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 states have internal predecessors, (69), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-03 02:31:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-11-03 02:31:25,580 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 64 [2022-11-03 02:31:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:25,581 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-11-03 02:31:25,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-03 02:31:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-11-03 02:31:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:31:25,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:25,582 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:25,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:25,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:25,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash -86348583, now seen corresponding path program 2 times [2022-11-03 02:31:25,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:25,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107667739] [2022-11-03 02:31:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:25,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:31:29,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107667739] [2022-11-03 02:31:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107667739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926456275] [2022-11-03 02:31:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:31:29,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:29,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:29,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:31:30,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:31:30,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:31:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:30,336 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:31:30,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 02:31:30,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:31:30,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:31:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:30,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-03 02:31:30,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:30,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 23 [2022-11-03 02:31:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:30,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-03 02:31:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:30,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 23 [2022-11-03 02:31:30,714 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:31:30,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_97| input size 61 context size 61 output size 61 [2022-11-03 02:31:30,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071242283] [2022-11-03 02:31:30,717 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:31:30,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:30,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:30,717 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:30,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:30,820 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:31:30,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:31:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:30,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:31:31,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:31:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:31:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:31:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:31:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:31,289 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:31:31,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:31:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:31,350 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:31:31,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:31:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,477 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:31:31,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:31:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,623 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:31:31,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:31:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:31:31,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:31:31,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:31:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:31:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:31:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:31:31,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:31,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:31:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:31,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:31:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:31:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:31,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:32,847 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-03 02:31:33,635 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-03 02:31:33,925 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 02:31:33,963 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-03 02:31:34,796 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:31:34,797 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:31:34,814 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:31:34,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:50,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5281#(and (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_48 Int)) (and (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_48) 0)) (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_48) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_48)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (not (= (mod (ite (= v_aws_linked_list_front_~list.base_BEFORE_CALL_48 0) 0 1) 256) 0)) (<= 0 v_aws_linked_list_front_~list.base_BEFORE_CALL_48) (<= (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_48) 0)) (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_48) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_48)) 1 0) 0) 0 1) 1) (<= 0 (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_48) 0)) (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_48) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_48)) 1 0) 0) 0 1)))) (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| Int)) (and (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)))))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:50,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:50,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:31:50,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-03 02:31:50,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114325327] [2022-11-03 02:31:50,998 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:50,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:31:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:31:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2460, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:31:51,000 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:31:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:52,461 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-11-03 02:31:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:31:52,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 70 [2022-11-03 02:31:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:52,462 INFO L225 Difference]: With dead ends: 159 [2022-11-03 02:31:52,462 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 02:31:52,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:31:52,464 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 51 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:52,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 342 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:31:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 02:31:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-11-03 02:31:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 63 states have internal predecessors, (72), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2022-11-03 02:31:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2022-11-03 02:31:52,501 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 70 [2022-11-03 02:31:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:52,501 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2022-11-03 02:31:52,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:31:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2022-11-03 02:31:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:31:52,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:52,504 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:52,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:31:52,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1576417214, now seen corresponding path program 1 times [2022-11-03 02:31:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:52,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191275954] [2022-11-03 02:31:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:52,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:31:57,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191275954] [2022-11-03 02:31:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191275954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871105567] [2022-11-03 02:31:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:57,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:57,545 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:57,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:31:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-03 02:31:57,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:57,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:31:58,184 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:31:58,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 02:31:58,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:31:58,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:58,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:31:58,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:58,315 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-03 02:31:58,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_103| input size 55 context size 55 output size 55 [2022-11-03 02:31:58,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883902919] [2022-11-03 02:31:58,329 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:31:58,329 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:58,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:58,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:58,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,414 INFO L356 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2022-11-03 02:31:58,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2022-11-03 02:31:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,509 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:31:58,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:31:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:31:58,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:31:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:31:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:31:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:58,984 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:31:58,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:31:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:31:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:31:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:31:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:59,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:31:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:31:59,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:59,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:59,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:59,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:59,961 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 02:31:59,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:32:00,788 INFO L356 Elim1Store]: treesize reduction 226, result has 23.1 percent of original size [2022-11-03 02:32:00,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 682 treesize of output 721 [2022-11-03 02:32:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:00,898 INFO L356 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2022-11-03 02:32:00,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 702 treesize of output 667 [2022-11-03 02:32:00,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-03 02:32:01,123 INFO L356 Elim1Store]: treesize reduction 112, result has 11.8 percent of original size [2022-11-03 02:32:01,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 case distinctions, treesize of input 675 treesize of output 687 [2022-11-03 02:32:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:01,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:01,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:01,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:01,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:01,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:01,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:01,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:01,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:01,441 INFO L356 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-03 02:32:01,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 720 treesize of output 723 [2022-11-03 02:32:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:04,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:32:04,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:32:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:32:05,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:32:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:32:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:32:05,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:32:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:32:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:32:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:32:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:05,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:32:06,070 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-03 02:32:07,453 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-03 02:32:07,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-11-03 02:32:07,835 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-03 02:32:08,624 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:32:08,625 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 111 for LOIs [2022-11-03 02:32:08,645 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:32:08,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:17,106 WARN L234 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 93 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:41,414 WARN L234 SmtUtils]: Spent 12.41s on a formula simplification. DAG size of input: 89 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:54,047 WARN L234 SmtUtils]: Spent 12.38s on a formula simplification. DAG size of input: 91 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:54,049 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5780#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24)) 0) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24)))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 0))) (<= 0 ~tl_last_error~0) (exists ((|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55| Int)) (and (not (= 0 (mod (ite (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55| 0) 0 1) 256))) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) 0) 16) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) 0) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|)) 1 0) 0) 0 1)) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) 0) 16) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) 0) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|)) 1 0) 0) 0 1) 1) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) 0) 16) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|) 0) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_55|)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)))) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:32:54,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:54,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:32:54,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-03 02:32:54,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542806991] [2022-11-03 02:32:54,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:54,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:32:54,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:32:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2768, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:32:54,051 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-03 02:32:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:55,566 INFO L93 Difference]: Finished difference Result 197 states and 261 transitions. [2022-11-03 02:32:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:32:55,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 78 [2022-11-03 02:32:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:55,570 INFO L225 Difference]: With dead ends: 197 [2022-11-03 02:32:55,570 INFO L226 Difference]: Without dead ends: 145 [2022-11-03 02:32:55,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=277, Invalid=3883, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 02:32:55,573 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 68 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:55,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 734 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:32:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-03 02:32:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2022-11-03 02:32:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 76 states have internal predecessors, (84), 42 states have call successors, (42), 16 states have call predecessors, (42), 17 states have return successors, (49), 40 states have call predecessors, (49), 41 states have call successors, (49) [2022-11-03 02:32:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2022-11-03 02:32:55,612 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 78 [2022-11-03 02:32:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:55,613 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2022-11-03 02:32:55,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-03 02:32:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2022-11-03 02:32:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:32:55,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:55,614 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:55,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:32:55,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash -544134838, now seen corresponding path program 2 times [2022-11-03 02:32:55,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:55,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789871403] [2022-11-03 02:32:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:32:59,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789871403] [2022-11-03 02:32:59,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789871403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664745543] [2022-11-03 02:32:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:32:59,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:59,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:59,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afd9bab8-e554-4617-aba8-6af5f78438e9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:33:00,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:33:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:33:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-03 02:33:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:00,107 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:33:00,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-11-03 02:33:00,832 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 02:33:00,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-11-03 02:33:00,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:33:00,880 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-11-03 02:33:00,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-11-03 02:33:00,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:33:00,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 5 [2022-11-03 02:33:00,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:33:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:00,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-11-03 02:33:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:00,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 02:33:01,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:33:01,112 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 02:33:01,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-11-03 02:33:01,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:33:01,158 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-11-03 02:33:01,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-11-03 02:33:01,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 6 [2022-11-03 02:33:01,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:01,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:33:01,372 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:33:01,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 69 [2022-11-03 02:33:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:01,683 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 02:33:01,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 84 [2022-11-03 02:33:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:01,707 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:33:01,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 96 [2022-11-03 02:33:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:01,781 INFO L356 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2022-11-03 02:33:01,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 46 [2022-11-03 02:33:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:01,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-11-03 02:33:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:01,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2022-11-03 02:33:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:02,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:02,032 INFO L356 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2022-11-03 02:33:02,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 91 [2022-11-03 02:33:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:02,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 02:33:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:02,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 02:33:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:33:02,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2022-11-03 02:33:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:33:08,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:14,944 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_1292 Int) (v_ArrVal_1296 Int) (v_ArrVal_1298 (Array Int Int)) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1295 (Array Int Int)) (v_ArrVal_1294 (Array Int Int))) (= |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset| (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1298) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_1292)))) (select (select .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1297) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_1296)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|)) (+ (select (select .cse0 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 8))))) (or (not (= 0 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|)) (not (= |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_1292 Int) (v_ArrVal_1296 Int) (v_ArrVal_1298 (Array Int Int)) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1295 (Array Int Int)) (v_ArrVal_1294 (Array Int Int))) (= (select (let ((.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1297) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_1296)))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|))) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1298) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_1292)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 8)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|)) (or (forall ((v_ArrVal_1296 Int) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1294 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1297) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_1296)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_1292 Int) (v_ArrVal_1298 (Array Int Int)) (v_ArrVal_1295 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1298) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_1292)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 0)))))) is different from false [2022-11-03 02:33:23,507 WARN L234 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:24,271 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-03 02:33:24,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1021 treesize of output 906 [2022-11-03 02:33:25,372 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-03 02:33:25,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1515 treesize of output 1292 [2022-11-03 02:33:28,817 INFO L356 Elim1Store]: treesize reduction 431, result has 60.5 percent of original size [2022-11-03 02:33:28,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 480728 treesize of output 463811 [2022-11-03 02:33:41,570 WARN L234 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 311 DAG size of output: 239 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:33:41,571 INFO L356 Elim1Store]: treesize reduction 420, result has 64.7 percent of original size [2022-11-03 02:33:41,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 80350872 treesize of output 76750560 [2022-11-03 02:36:14,390 WARN L234 SmtUtils]: Spent 2.55m on a formula simplification that was a NOOP. DAG size: 11675 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:39:02,326 WARN L234 SmtUtils]: Spent 2.80m on a formula simplification that was a NOOP. DAG size: 11672 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:39:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:39:06,680 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:39:06,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 941916805 treesize of output 887208112