./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/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_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/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_acbccc93-3416-44e4-8d37-b397bb359b4b/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 bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- 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 01:48:52,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:48:52,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:48:53,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:48:53,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:48:53,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:48:53,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:48:53,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:48:53,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:48:53,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:48:53,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:48:53,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:48:53,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:48:53,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:48:53,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:48:53,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:48:53,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:48:53,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:48:53,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:48:53,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:48:53,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:48:53,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:48:53,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:48:53,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:48:53,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:48:53,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:48:53,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:48:53,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:48:53,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:48:53,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:48:53,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:48:53,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:48:53,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:48:53,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:48:53,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:48:53,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:48:53,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:48:53,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:48:53,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:48:53,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:48:53,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:48:53,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:48:53,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:48:53,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:48:53,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:48:53,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:48:53,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:48:53,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:48:53,173 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:48:53,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:48:53,173 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:48:53,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:48:53,174 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:48:53,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:48:53,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:48:53,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:48:53,175 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:48:53,176 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:48:53,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:48:53,176 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:48:53,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:48:53,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:48:53,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:48:53,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:48:53,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:48:53,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:48:53,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:48:53,179 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:48:53,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:48:53,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:48:53,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:48:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:53,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:48:53,181 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:48:53,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:48:53,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:48:53,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:48:53,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:48:53,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:48:53,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:48:53,183 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_acbccc93-3416-44e4-8d37-b397bb359b4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2022-11-03 01:48:53,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:48:53,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:48:53,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:48:53,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:48:53,627 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:48:53,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2022-11-03 01:48:53,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/data/a3a93ad9e/420b6c8df8f9460f84eab2baf0785448/FLAGc947836b8 [2022-11-03 01:48:54,727 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:48:54,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2022-11-03 01:48:54,779 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/data/a3a93ad9e/420b6c8df8f9460f84eab2baf0785448/FLAGc947836b8 [2022-11-03 01:48:55,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/data/a3a93ad9e/420b6c8df8f9460f84eab2baf0785448 [2022-11-03 01:48:55,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:48:55,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:48:55,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:55,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:48:55,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:48:55,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:55" (1/1) ... [2022-11-03 01:48:55,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37984032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:55, skipping insertion in model container [2022-11-03 01:48:55,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:55" (1/1) ... [2022-11-03 01:48:55,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:48:55,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:48:55,656 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_acbccc93-3416-44e4-8d37-b397bb359b4b/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-11-03 01:48:55,664 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_acbccc93-3416-44e4-8d37-b397bb359b4b/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-11-03 01:48:56,861 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,866 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,868 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,869 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,871 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,897 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,900 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,905 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,907 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,911 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,913 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,914 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:56,916 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,343 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 01:48:57,344 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 01:48:57,346 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 01:48:57,347 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 01:48:57,349 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 01:48:57,350 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 01:48:57,351 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 01:48:57,351 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 01:48:57,352 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 01:48:57,353 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 01:48:57,491 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 01:48:57,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:57,542 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:48:57,558 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_acbccc93-3416-44e4-8d37-b397bb359b4b/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-11-03 01:48:57,588 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_acbccc93-3416-44e4-8d37-b397bb359b4b/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-11-03 01:48:57,662 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,663 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,663 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,664 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,665 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,701 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,702 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,703 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,704 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,706 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,706 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,707 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,707 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 01:48:57,759 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 01:48:57,760 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 01:48:57,761 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 01:48:57,762 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 01:48:57,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 01:48:57,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 01:48:57,765 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 01:48:57,766 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 01:48:57,766 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 01:48:57,767 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 01:48:57,796 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 01:48:57,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:58,143 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:48:58,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58 WrapperNode [2022-11-03 01:48:58,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:58,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:58,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:48:58,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:48:58,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,334 INFO L138 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2022-11-03 01:48:58,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:58,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:48:58,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:48:58,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:48:58,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:48:58,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:48:58,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:48:58,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:48:58,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (1/1) ... [2022-11-03 01:48:58,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:58,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:48:58,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:48:58,546 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-03 01:48:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-03 01:48:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-11-03 01:48:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-11-03 01:48:58,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:48:58,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:48:58,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:48:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:48:58,549 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 01:48:58,550 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 01:48:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:48:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 01:48:58,550 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 01:48:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:48:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:48:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:48:58,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:48:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-03 01:48:58,551 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-03 01:48:58,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 01:48:58,552 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 01:48:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:48:58,554 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:48:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:48:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:48:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:48:58,554 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 01:48:58,555 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 01:48:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-03 01:48:58,555 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-03 01:48:58,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:48:58,997 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:48:59,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:48:59,549 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:48:59,729 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:48:59,729 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-03 01:48:59,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:59 BoogieIcfgContainer [2022-11-03 01:48:59,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:48:59,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:48:59,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:48:59,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:48:59,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:48:55" (1/3) ... [2022-11-03 01:48:59,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215e147f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:59, skipping insertion in model container [2022-11-03 01:48:59,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:58" (2/3) ... [2022-11-03 01:48:59,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215e147f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:59, skipping insertion in model container [2022-11-03 01:48:59,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:59" (3/3) ... [2022-11-03 01:48:59,749 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2022-11-03 01:48:59,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:48:59,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:48:59,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:48:59,874 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;@7feafda5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:48:59,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:48:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-03 01:48:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:48:59,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:59,895 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:59,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -53848961, now seen corresponding path program 1 times [2022-11-03 01:48:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:59,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477605583] [2022-11-03 01:48:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 01:49:01,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477605583] [2022-11-03 01:49:01,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477605583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792327842] [2022-11-03 01:49:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:01,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:01,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:01,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:49:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:49:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:01,728 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 01:49:01,768 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 01:49:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,913 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 01:49:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:01,972 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 01:49:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 01:49:06,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792327842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:06,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:06,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-03 01:49:06,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233795100] [2022-11-03 01:49:06,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:49:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:49:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:49:06,090 INFO L87 Difference]: Start difference. First operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 01:49:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:06,969 INFO L93 Difference]: Finished difference Result 237 states and 363 transitions. [2022-11-03 01:49:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:49:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 70 [2022-11-03 01:49:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:06,983 INFO L225 Difference]: With dead ends: 237 [2022-11-03 01:49:06,983 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 01:49:06,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 20 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:49:06,990 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 24 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:06,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 750 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2022-11-03 01:49:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 01:49:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2022-11-03 01:49:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 63 states have internal predecessors, (73), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 48 states have call successors, (50) [2022-11-03 01:49:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2022-11-03 01:49:07,050 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 70 [2022-11-03 01:49:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:07,051 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2022-11-03 01:49:07,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 01:49:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2022-11-03 01:49:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 01:49:07,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:07,055 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:07,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:49:07,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 01:49:07,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1869393802, now seen corresponding path program 1 times [2022-11-03 01:49:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292060096] [2022-11-03 01:49:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 01:49:07,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292060096] [2022-11-03 01:49:07,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292060096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125864292] [2022-11-03 01:49:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:07,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:07,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:07,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:07,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:49:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:08,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 01:49:08,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:08,072 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 01:49:08,305 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 01:49:08,339 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 01:49:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,432 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 01:49:08,453 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:49:08,454 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 01:49:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,466 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 01:49:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:49:08,529 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:49:08,529 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 01:49:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:08,544 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 01:49:08,578 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:49:08,579 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 01:49:08,766 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 01:49:08,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_97| input size 62 context size 62 output size 62 [2022-11-03 01:49:08,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109802493] [2022-11-03 01:49:08,802 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-03 01:49:08,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:08,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:08,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:08,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:08,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,015 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:49:09,016 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 62 [2022-11-03 01:49:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,132 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:49:09,133 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 01:49:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,539 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 01:49:09,602 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 01:49:09,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,650 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 01:49:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,691 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 01:49:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:09,811 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:49:09,812 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 01:49:09,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:09,945 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:49:09,946 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 01:49:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,015 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 01:49:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:10,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:10,100 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:49:10,101 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 01:49:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,280 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:49:10,280 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 01:49:10,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,367 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 01:49:10,488 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 01:49:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,518 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 01:49:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,565 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 47 treesize of output 13 [2022-11-03 01:49:10,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,629 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 01:49:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,665 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 01:49:10,689 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 01:49:10,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,761 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 01:49:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,793 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 01:49:10,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,822 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 35 treesize of output 7 [2022-11-03 01:49:10,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:10,843 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 01:49:15,831 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-11-03 01:49:16,265 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-03 01:49:16,577 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:49:16,580 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:49:16,613 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:24,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [109802493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:24,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:24,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 24 [2022-11-03 01:49:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270761038] [2022-11-03 01:49:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:49:24,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:49:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:49:24,101 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 01:49:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:24,653 INFO L93 Difference]: Finished difference Result 226 states and 301 transitions. [2022-11-03 01:49:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:49:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 71 [2022-11-03 01:49:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:24,656 INFO L225 Difference]: With dead ends: 226 [2022-11-03 01:49:24,656 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 01:49:24,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:49:24,659 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 5 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:24,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1054 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2022-11-03 01:49:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 01:49:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2022-11-03 01:49:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 60 states have internal predecessors, (70), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 01:49:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2022-11-03 01:49:24,696 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 71 [2022-11-03 01:49:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:24,696 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2022-11-03 01:49:24,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 01:49:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2022-11-03 01:49:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:49:24,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:24,704 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:24,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:24,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:24,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1341664707, now seen corresponding path program 1 times [2022-11-03 01:49:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:24,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46933877] [2022-11-03 01:49:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 01:49:25,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:25,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46933877] [2022-11-03 01:49:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46933877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161050250] [2022-11-03 01:49:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:25,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:25,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:25,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:25,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:49:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:25,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:49:25,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:25,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161050250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:25,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:25,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-03 01:49:25,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691395897] [2022-11-03 01:49:25,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:25,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:49:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:49:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:49:25,671 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:49:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:26,043 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2022-11-03 01:49:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2022-11-03 01:49:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:26,046 INFO L225 Difference]: With dead ends: 204 [2022-11-03 01:49:26,046 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 01:49:26,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:49:26,053 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 54 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:26,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 504 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 01:49:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-03 01:49:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 65 states have internal predecessors, (73), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-11-03 01:49:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2022-11-03 01:49:26,108 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 72 [2022-11-03 01:49:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:26,109 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2022-11-03 01:49:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:49:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2022-11-03 01:49:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:49:26,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:26,111 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:26,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:26,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1924319100, now seen corresponding path program 1 times [2022-11-03 01:49:26,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449628998] [2022-11-03 01:49:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:26,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 01:49:26,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449628998] [2022-11-03 01:49:26,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449628998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181669319] [2022-11-03 01:49:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:26,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:26,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:26,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:49:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:49:26,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:49:27,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:27,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181669319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:27,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:27,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-03 01:49:27,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775119780] [2022-11-03 01:49:27,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:49:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:49:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:49:27,074 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:49:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:27,562 INFO L93 Difference]: Finished difference Result 221 states and 307 transitions. [2022-11-03 01:49:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2022-11-03 01:49:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:27,565 INFO L225 Difference]: With dead ends: 221 [2022-11-03 01:49:27,565 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 01:49:27,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:49:27,566 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 83 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:27,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 589 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:49:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 01:49:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2022-11-03 01:49:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-11-03 01:49:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 167 transitions. [2022-11-03 01:49:27,609 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 167 transitions. Word has length 74 [2022-11-03 01:49:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:27,610 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 167 transitions. [2022-11-03 01:49:27,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:49:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 167 transitions. [2022-11-03 01:49:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:49:27,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:27,613 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:27,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:27,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:27,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash -915652434, now seen corresponding path program 1 times [2022-11-03 01:49:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:27,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404609631] [2022-11-03 01:49:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:27,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 01:49:28,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404609631] [2022-11-03 01:49:28,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404609631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872388585] [2022-11-03 01:49:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:28,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:28,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:28,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:28,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:49:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:49:28,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:28,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872388585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:28,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:28,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 01:49:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172612386] [2022-11-03 01:49:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:28,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:28,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:49:28,626 INFO L87 Difference]: Start difference. First operand 124 states and 167 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:49:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:28,737 INFO L93 Difference]: Finished difference Result 222 states and 311 transitions. [2022-11-03 01:49:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 75 [2022-11-03 01:49:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:28,742 INFO L225 Difference]: With dead ends: 222 [2022-11-03 01:49:28,742 INFO L226 Difference]: Without dead ends: 133 [2022-11-03 01:49:28,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:49:28,747 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:28,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-03 01:49:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2022-11-03 01:49:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 68 states have internal predecessors, (77), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-11-03 01:49:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2022-11-03 01:49:28,787 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 75 [2022-11-03 01:49:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:28,787 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2022-11-03 01:49:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:49:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2022-11-03 01:49:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 01:49:28,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:28,790 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:28,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:29,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:29,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:29,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1617287136, now seen corresponding path program 1 times [2022-11-03 01:49:29,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:29,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887252054] [2022-11-03 01:49:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:29,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 01:49:29,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:29,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887252054] [2022-11-03 01:49:29,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887252054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:29,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760582908] [2022-11-03 01:49:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:29,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:29,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:29,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:49:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:49:29,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:49:30,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:30,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760582908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:30,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:30,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 12 [2022-11-03 01:49:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233948486] [2022-11-03 01:49:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:49:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:49:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:49:30,006 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand has 10 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:49:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:30,560 INFO L93 Difference]: Finished difference Result 221 states and 302 transitions. [2022-11-03 01:49:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:49:30,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 78 [2022-11-03 01:49:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:30,563 INFO L225 Difference]: With dead ends: 221 [2022-11-03 01:49:30,563 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 01:49:30,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:49:30,565 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 27 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:30,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 756 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:49:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 01:49:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-11-03 01:49:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 69 states have internal predecessors, (78), 43 states have call successors, (43), 15 states have call predecessors, (43), 16 states have return successors, (48), 41 states have call predecessors, (48), 42 states have call successors, (48) [2022-11-03 01:49:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2022-11-03 01:49:30,596 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 78 [2022-11-03 01:49:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:30,597 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2022-11-03 01:49:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:49:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2022-11-03 01:49:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:49:30,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:30,599 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:30,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:49:30,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1639947929, now seen corresponding path program 1 times [2022-11-03 01:49:30,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063646225] [2022-11-03 01:49:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 01:49:32,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063646225] [2022-11-03 01:49:32,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063646225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78499475] [2022-11-03 01:49:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:32,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:32,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:32,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:49:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 01:49:32,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:46,906 WARN L234 SmtUtils]: Spent 8.49s 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 01:49:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:49:48,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 01:49:51,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78499475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:51,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207743591] [2022-11-03 01:49:51,037 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:49:51,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:51,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:51,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:51,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,152 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:49:51,152 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 62 [2022-11-03 01:49:51,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,254 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:49:51,254 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 01:49:51,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,647 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 01:49:51,681 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 01:49:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,711 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 01:49:51,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,741 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 01:49:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,820 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 01:49:51,852 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 01:49:51,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,882 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 01:49:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:51,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 01:49:52,576 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 131 for LOIs [2022-11-03 01:49:52,770 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:49:52,773 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:49:52,797 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:08,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [207743591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:08,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:08,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 9, 6] total 31 [2022-11-03 01:50:08,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255146780] [2022-11-03 01:50:08,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:08,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:50:08,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:50:08,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=797, Unknown=5, NotChecked=0, Total=930 [2022-11-03 01:50:08,235 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 01:50:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:11,025 INFO L93 Difference]: Finished difference Result 228 states and 305 transitions. [2022-11-03 01:50:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:50:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 80 [2022-11-03 01:50:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:11,028 INFO L225 Difference]: With dead ends: 228 [2022-11-03 01:50:11,028 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 01:50:11,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=128, Invalid=797, Unknown=5, NotChecked=0, Total=930 [2022-11-03 01:50:11,030 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 120 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:11,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 262 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 720 Invalid, 0 Unknown, 105 Unchecked, 2.7s Time] [2022-11-03 01:50:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 01:50:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-11-03 01:50:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 38 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-03 01:50:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2022-11-03 01:50:11,060 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 80 [2022-11-03 01:50:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:11,060 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2022-11-03 01:50:11,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 01:50:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2022-11-03 01:50:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 01:50:11,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:11,063 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:11,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:11,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:11,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1082961456, now seen corresponding path program 1 times [2022-11-03 01:50:11,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125780159] [2022-11-03 01:50:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:50:11,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125780159] [2022-11-03 01:50:11,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125780159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548407865] [2022-11-03 01:50:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:11,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:11,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:11,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:11,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:50:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:12,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 01:50:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:22,485 WARN L234 SmtUtils]: Spent 8.45s 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 01:50:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 01:50:23,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 01:50:28,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548407865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392140088] [2022-11-03 01:50:28,449 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:50:28,450 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:28,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:28,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:28,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,589 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:50:28,590 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 01:50:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,615 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 01:50:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:28,957 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 01:50:28,986 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 01:50:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,017 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 01:50:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,048 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 01:50:29,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:29,163 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:50:29,164 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 01:50:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,302 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:50:29,303 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 01:50:29,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,352 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 01:50:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,391 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 01:50:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,428 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 01:50:29,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,471 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 01:50:29,576 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 01:50:29,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:50:29,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,602 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 01:50:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,635 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 47 treesize of output 13 [2022-11-03 01:50:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,667 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 47 treesize of output 13 [2022-11-03 01:50:29,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,688 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 01:50:29,722 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 01:50:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,757 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 01:50:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,782 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 01:50:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,800 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 01:50:29,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:50:29,835 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 01:50:35,073 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-11-03 01:50:35,430 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-03 01:50:36,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:50:36,593 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:50:36,616 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:50:36,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:10,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1392140088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:10,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:10,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [7, 9, 6] total 44 [2022-11-03 01:51:10,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868898255] [2022-11-03 01:51:10,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:10,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 01:51:10,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:10,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 01:51:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1713, Unknown=12, NotChecked=0, Total=1892 [2022-11-03 01:51:10,212 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 9 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-03 01:51:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:11,940 INFO L93 Difference]: Finished difference Result 225 states and 300 transitions. [2022-11-03 01:51:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 01:51:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 9 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 81 [2022-11-03 01:51:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:11,942 INFO L225 Difference]: With dead ends: 225 [2022-11-03 01:51:11,942 INFO L226 Difference]: Without dead ends: 124 [2022-11-03 01:51:11,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=178, Invalid=1790, Unknown=12, NotChecked=0, Total=1980 [2022-11-03 01:51:11,945 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 15 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:11,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 552 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 511 Invalid, 0 Unknown, 213 Unchecked, 1.5s Time] [2022-11-03 01:51:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-03 01:51:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-03 01:51:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 71 states have internal predecessors, (83), 39 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (44), 38 states have call predecessors, (44), 38 states have call successors, (44) [2022-11-03 01:51:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 166 transitions. [2022-11-03 01:51:11,987 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 166 transitions. Word has length 81 [2022-11-03 01:51:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:11,987 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 166 transitions. [2022-11-03 01:51:11,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 9 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-03 01:51:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 166 transitions. [2022-11-03 01:51:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 01:51:11,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:11,990 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:12,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:12,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:12,205 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 347930842, now seen corresponding path program 1 times [2022-11-03 01:51:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197062466] [2022-11-03 01:51:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:12,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 01:51:12,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:12,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197062466] [2022-11-03 01:51:12,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197062466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:12,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655133778] [2022-11-03 01:51:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:12,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:12,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:51:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 01:51:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:12,921 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 01:51:13,127 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 01:51:13,147 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:51:13,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 01:51:13,161 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 01:51:13,188 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:51:13,189 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 01:51:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:13,243 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 01:51:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:13,249 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 01:51:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:51:13,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:14,356 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_831 (Array Int Int)) (v_ArrVal_829 (Array Int Int)) (v_ArrVal_832 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_831) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_829) |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_832)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) (+ 16 |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|)))) is different from false [2022-11-03 01:51:14,369 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:51:14,369 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 01:51:14,400 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:51:14,400 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 01:51:14,410 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 01:51:14,430 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 01:51:14,499 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 01:51:14,583 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:51:14,583 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 121 treesize of output 119 [2022-11-03 01:51:14,704 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 01:51:14,725 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 42 treesize of output 38 [2022-11-03 01:51:15,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655133778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412024335] [2022-11-03 01:51:15,176 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:51:15,177 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:15,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:15,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:15,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,295 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:51:15,295 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 62 [2022-11-03 01:51:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,398 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:51:15,398 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 01:51:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,701 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 01:51:15,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,764 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 01:51:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,807 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 01:51:15,835 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 01:51:15,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:15,917 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:51:15,917 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 01:51:15,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:15,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,070 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:51:16,071 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 01:51:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,125 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 01:51:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,159 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 01:51:16,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,192 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 01:51:16,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,232 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 01:51:16,295 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 01:51:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,329 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 01:51:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,353 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 01:51:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,381 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 01:51:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,409 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 01:51:16,426 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 01:51:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,469 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 01:51:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,488 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 01:51:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,511 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 01:51:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:16,528 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 01:51:29,486 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 19 for LOIs [2022-11-03 01:51:29,523 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 01:51:29,566 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:51:30,425 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:51:30,429 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:51:30,453 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:51:30,527 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:58,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7130#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 24)) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_93|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93| 24))) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_93|)))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119| Int)) (and (<= 0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) (not (= 0 (mod (ite (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119| 0) 0 1) 256))) (<= (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) 0)) (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) 0))) 1 0) 0) 0 1) 1) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) 0)) (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) 0)) (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_119|) 0))) 1 0) 0) 0 1)))) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:58,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:58,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:51:58,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13] total 17 [2022-11-03 01:51:58,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973948813] [2022-11-03 01:51:58,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:51:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:51:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3518, Unknown=1, NotChecked=120, Total=3906 [2022-11-03 01:51:58,961 INFO L87 Difference]: Start difference. First operand 124 states and 166 transitions. Second operand has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-11-03 01:51:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:59,492 INFO L93 Difference]: Finished difference Result 233 states and 312 transitions. [2022-11-03 01:51:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:51:59,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 82 [2022-11-03 01:51:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:59,497 INFO L225 Difference]: With dead ends: 233 [2022-11-03 01:51:59,497 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 01:51:59,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 164 SyntacticMatches, 18 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=291, Invalid=4002, Unknown=1, NotChecked=128, Total=4422 [2022-11-03 01:51:59,500 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 10 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:59,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1038 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2022-11-03 01:51:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 01:51:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-03 01:51:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 78 states have internal predecessors, (89), 40 states have call successors, (40), 16 states have call predecessors, (40), 18 states have return successors, (48), 39 states have call predecessors, (48), 39 states have call successors, (48) [2022-11-03 01:51:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 177 transitions. [2022-11-03 01:51:59,565 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 177 transitions. Word has length 82 [2022-11-03 01:51:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:59,568 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 177 transitions. [2022-11-03 01:51:59,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-11-03 01:51:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 177 transitions. [2022-11-03 01:51:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 01:51:59,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:59,570 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:59,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:59,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1065427865, now seen corresponding path program 1 times [2022-11-03 01:51:59,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:59,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430108788] [2022-11-03 01:51:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:59,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 01:52:00,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430108788] [2022-11-03 01:52:00,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430108788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776609275] [2022-11-03 01:52:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:00,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:00,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:00,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:52:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:52:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:52:00,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:00,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776609275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:00,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:00,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-03 01:52:00,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413938725] [2022-11-03 01:52:00,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:00,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:52:00,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:52:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:52:00,650 INFO L87 Difference]: Start difference. First operand 134 states and 177 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:52:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:01,103 INFO L93 Difference]: Finished difference Result 227 states and 302 transitions. [2022-11-03 01:52:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 90 [2022-11-03 01:52:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:01,106 INFO L225 Difference]: With dead ends: 227 [2022-11-03 01:52:01,106 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 01:52:01,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:52:01,108 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 63 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:01,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 565 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 01:52:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-03 01:52:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.16) internal successors, (87), 78 states have internal predecessors, (87), 40 states have call successors, (40), 16 states have call predecessors, (40), 18 states have return successors, (48), 39 states have call predecessors, (48), 39 states have call successors, (48) [2022-11-03 01:52:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 175 transitions. [2022-11-03 01:52:01,150 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 175 transitions. Word has length 90 [2022-11-03 01:52:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:01,150 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 175 transitions. [2022-11-03 01:52:01,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:52:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 175 transitions. [2022-11-03 01:52:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 01:52:01,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:01,152 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:01,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 01:52:01,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:52:01,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1913504448, now seen corresponding path program 1 times [2022-11-03 01:52:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:01,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480296707] [2022-11-03 01:52:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:01,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 01:52:01,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480296707] [2022-11-03 01:52:01,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480296707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240806709] [2022-11-03 01:52:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:01,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:01,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:01,752 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:01,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:52:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:52:02,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:02,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240806709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:02,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:02,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-03 01:52:02,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773585244] [2022-11-03 01:52:02,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:02,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:52:02,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:02,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:52:02,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:52:02,357 INFO L87 Difference]: Start difference. First operand 134 states and 175 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:52:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:02,933 INFO L93 Difference]: Finished difference Result 233 states and 312 transitions. [2022-11-03 01:52:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:52:02,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 92 [2022-11-03 01:52:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:02,935 INFO L225 Difference]: With dead ends: 233 [2022-11-03 01:52:02,936 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 01:52:02,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:52:02,937 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 72 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:02,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 667 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:52:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 01:52:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2022-11-03 01:52:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 75 states have internal predecessors, (84), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (46), 39 states have call predecessors, (46), 39 states have call successors, (46) [2022-11-03 01:52:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2022-11-03 01:52:02,978 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 92 [2022-11-03 01:52:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:02,979 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2022-11-03 01:52:02,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:52:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2022-11-03 01:52:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 01:52:02,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:02,981 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:03,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:03,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:52:03,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:03,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:03,197 INFO L85 PathProgramCache]: Analyzing trace with hash 672928668, now seen corresponding path program 1 times [2022-11-03 01:52:03,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:03,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008260664] [2022-11-03 01:52:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-03 01:52:03,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008260664] [2022-11-03 01:52:03,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008260664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425133357] [2022-11-03 01:52:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:03,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:03,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:03,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:52:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:52:03,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 58 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 01:52:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-03 01:52:04,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425133357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169468816] [2022-11-03 01:52:04,453 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:52:04,454 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:04,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:04,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:04,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,591 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:52:04,592 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 01:52:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,619 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 01:52:04,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,935 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 01:52:04,964 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 01:52:04,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:04,992 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 01:52:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,025 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 01:52:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,204 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:52:05,205 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 01:52:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,246 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 01:52:05,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:05,287 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 01:52:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 01:52:05,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,368 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 01:52:05,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,409 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 01:52:05,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:05,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:05,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:05,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:05,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:05,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:06,399 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 01:52:06,399 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 694 treesize of output 703 [2022-11-03 01:52:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:06,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:06,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:06,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:06,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:06,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:06,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:06,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:07,090 INFO L356 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-03 01:52:07,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 708 treesize of output 717 [2022-11-03 01:52:07,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:07,132 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 01:52:07,540 INFO L356 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2022-11-03 01:52:07,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 675 treesize of output 687 [2022-11-03 01:52:07,959 INFO L356 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2022-11-03 01:52:07,960 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 678 treesize of output 697 [2022-11-03 01:52:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:08,063 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 01:52:08,063 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 710 treesize of output 663 [2022-11-03 01:52:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:08,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 684 treesize of output 663 [2022-11-03 01:52:25,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,054 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 01:52:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,076 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 01:52:25,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,103 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 01:52:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,128 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 01:52:25,148 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 01:52:25,161 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 01:52:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,195 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 01:52:25,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,209 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 01:52:25,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,235 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 01:52:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,251 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 01:52:27,718 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 25 for LOIs [2022-11-03 01:52:27,771 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2022-11-03 01:52:27,862 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-03 01:52:28,892 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-03 01:52:28,895 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:52:28,928 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:52:29,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:54,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10011#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) 16) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (<= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99| (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_99|)))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| Int)) (and (not (= 0 (mod (ite (= (ite (= (mod (ite (= (ite (and (= (+ 16 |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|)) (= |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256))) (<= 0 (ite (= (ite (and (= (+ 16 |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|)) (= |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|))) 1 0) 0) 0 1)) (<= |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34| 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) (<= 0 |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|) (<= (ite (= (ite (and (= (+ 16 |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|)) (= |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|))) 1 0) 0) 0 1) 1) (not (= (mod (ite (= (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34|) 0) 0 1) 256) 0)))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-03 01:52:54,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:54,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:54,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-03 01:52:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585273092] [2022-11-03 01:52:54,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:54,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:52:54,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:54,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:52:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2441, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 01:52:54,082 INFO L87 Difference]: Start difference. First operand 131 states and 170 transitions. Second operand has 16 states, 10 states have (on average 4.9) internal successors, (49), 12 states have internal predecessors, (49), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-03 01:52:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:54,838 INFO L93 Difference]: Finished difference Result 222 states and 293 transitions. [2022-11-03 01:52:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:52:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.9) internal successors, (49), 12 states have internal predecessors, (49), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 96 [2022-11-03 01:52:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:54,840 INFO L225 Difference]: With dead ends: 222 [2022-11-03 01:52:54,840 INFO L226 Difference]: Without dead ends: 135 [2022-11-03 01:52:54,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 236 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:52:54,843 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 7 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:54,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1317 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:52:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-03 01:52:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-11-03 01:52:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (46), 39 states have call predecessors, (46), 39 states have call successors, (46) [2022-11-03 01:52:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 171 transitions. [2022-11-03 01:52:54,882 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 171 transitions. Word has length 96 [2022-11-03 01:52:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:54,883 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 171 transitions. [2022-11-03 01:52:54,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.9) internal successors, (49), 12 states have internal predecessors, (49), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-03 01:52:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 171 transitions. [2022-11-03 01:52:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:52:54,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:54,885 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:54,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:55,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:52:55,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1616069117, now seen corresponding path program 2 times [2022-11-03 01:52:55,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493969709] [2022-11-03 01:52:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 01:52:56,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493969709] [2022-11-03 01:52:56,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493969709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280030700] [2022-11-03 01:52:56,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:56,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:56,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:56,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:56,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:52:56,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:52:56,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:52:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 01:52:56,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:56,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280030700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:56,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:56,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-03 01:52:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916391744] [2022-11-03 01:52:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:52:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:52:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:52:56,958 INFO L87 Difference]: Start difference. First operand 132 states and 171 transitions. Second operand has 7 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:52:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:57,282 INFO L93 Difference]: Finished difference Result 222 states and 292 transitions. [2022-11-03 01:52:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 98 [2022-11-03 01:52:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:57,284 INFO L225 Difference]: With dead ends: 222 [2022-11-03 01:52:57,284 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 01:52:57,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:52:57,286 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 6 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:57,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:52:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 01:52:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-11-03 01:52:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 73 states have internal predecessors, (83), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2022-11-03 01:52:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2022-11-03 01:52:57,328 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 98 [2022-11-03 01:52:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:57,329 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2022-11-03 01:52:57,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:52:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2022-11-03 01:52:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 01:52:57,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:57,331 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:57,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:57,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:52:57,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash 638919251, now seen corresponding path program 2 times [2022-11-03 01:52:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:57,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316831011] [2022-11-03 01:52:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:57,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-03 01:52:59,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316831011] [2022-11-03 01:52:59,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316831011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:59,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522923531] [2022-11-03 01:52:59,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:59,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:59,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:53:00,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:53:00,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-03 01:53:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:00,716 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-11-03 01:53:00,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-11-03 01:53:00,910 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 01:53:00,953 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 01:53:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,085 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 01:53:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,095 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 01:53:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,127 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 01:53:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,147 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 01:53:01,312 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 01:53:01,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_128| input size 61 context size 61 output size 61 [2022-11-03 01:53:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209208221] [2022-11-03 01:53:01,315 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:53:01,315 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:01,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:01,316 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:01,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,420 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:53:01,421 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 62 [2022-11-03 01:53:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,527 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:53:01,527 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 01:53:01,850 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 01:53:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,871 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 01:53:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,898 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 01:53:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,930 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 01:53:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:02,018 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:53:02,019 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 01:53:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,061 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 01:53:02,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:02,142 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:53:02,142 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 01:53:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,182 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 01:53:02,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,334 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:53:02,334 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 01:53:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,526 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:53:02,527 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 01:53:02,600 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 01:53:02,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,627 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 01:53:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,657 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 47 treesize of output 13 [2022-11-03 01:53:02,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,677 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 01:53:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,701 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 01:53:02,727 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 01:53:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,764 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 01:53:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,782 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 01:53:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,810 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 01:53:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,839 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 01:53:15,155 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 19 for LOIs [2022-11-03 01:53:15,195 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 01:53:15,244 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:53:16,197 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:53:16,199 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:53:16,221 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:53:16,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:45,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11489#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52| Int)) (and (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) 0) |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) 0) 16)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) 0) |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) 0) 16)) 1 0) 0) 0 1)) (not (= (mod (ite (= |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52| 0) 0 1) 256) 0)) (<= 0 |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) 0) |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_52|) 0) 16)) 1 0) 0) 0 1) 1))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_175|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_175| 16)))) (= ~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 01:53:45,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:45,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:53:45,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-03 01:53:45,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176325391] [2022-11-03 01:53:45,263 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:45,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:53:45,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:53:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2536, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 01:53:45,265 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-03 01:53:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:46,699 INFO L93 Difference]: Finished difference Result 235 states and 315 transitions. [2022-11-03 01:53:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:53:46,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-11-03 01:53:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:46,701 INFO L225 Difference]: With dead ends: 235 [2022-11-03 01:53:46,701 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 01:53:46,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=270, Invalid=3390, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 01:53:46,704 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 84 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:46,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 844 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:53:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 01:53:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2022-11-03 01:53:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 80 states have internal predecessors, (92), 41 states have call successors, (41), 16 states have call predecessors, (41), 17 states have return successors, (45), 40 states have call predecessors, (45), 40 states have call successors, (45) [2022-11-03 01:53:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2022-11-03 01:53:46,761 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 99 [2022-11-03 01:53:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:46,761 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2022-11-03 01:53:46,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-03 01:53:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2022-11-03 01:53:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 01:53:46,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:46,764 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:46,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:46,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:46,989 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash 27559344, now seen corresponding path program 3 times [2022-11-03 01:53:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:46,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712672274] [2022-11-03 01:53:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 01:53:56,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:56,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712672274] [2022-11-03 01:53:56,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712672274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:56,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533923488] [2022-11-03 01:53:56,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:53:56,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:56,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:56,092 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:56,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:53:56,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:53:56,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:56,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-03 01:53:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:56,512 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 01:53:57,091 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:53:57,091 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 01:53:57,100 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 01:53:57,105 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 01:53:57,221 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 01:53:57,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_134| input size 50 context size 50 output size 50 [2022-11-03 01:53:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597805001] [2022-11-03 01:53:57,233 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:53:57,233 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:57,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:57,234 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:57,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,339 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:53:57,340 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 62 [2022-11-03 01:53:57,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,442 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:53:57,443 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 01:53:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,760 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 01:53:57,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,793 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 01:53:57,827 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 01:53:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,857 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 01:53:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:57,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:57,962 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:53:57,962 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 01:53:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,105 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:53:58,106 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 01:53:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,263 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:53:58,264 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 01:53:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:58,320 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 01:53:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,370 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 01:53:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,416 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 01:53:58,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,494 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 01:53:58,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,536 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 01:53:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,572 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 01:53:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:58,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,600 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 01:53:58,617 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 01:53:58,632 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 01:53:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,681 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 01:53:58,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,706 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 01:53:58,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,737 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 01:53:58,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:58,756 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 01:54:11,109 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 19 for LOIs [2022-11-03 01:54:11,143 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 01:54:11,182 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:54:12,075 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:54:12,077 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:54:12,101 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:54:12,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:45,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12170#(and (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251| Int)) (and (<= 0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (not (= (mod (ite (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251| 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) 0))) 1 0) 0) 0 1)) (<= (ite (= (ite (and (= |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_251|) 0))) 1 0) 0) 0 1) 1))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_217|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_217| 16)))) (= |__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 01:54:45,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:45,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:54:45,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-03 01:54:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523621078] [2022-11-03 01:54:45,135 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:45,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:54:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:54:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3912, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 01:54:45,138 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 12 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-03 01:54:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:51,106 INFO L93 Difference]: Finished difference Result 267 states and 377 transitions. [2022-11-03 01:54:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:54:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 12 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) Word has length 105 [2022-11-03 01:54:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:51,123 INFO L225 Difference]: With dead ends: 267 [2022-11-03 01:54:51,124 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 01:54:51,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=377, Invalid=5785, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 01:54:51,131 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 253 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:51,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1718 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 01:54:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 01:54:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 157. [2022-11-03 01:54:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 90 states have (on average 1.211111111111111) internal successors, (109), 94 states have internal predecessors, (109), 47 states have call successors, (47), 16 states have call predecessors, (47), 19 states have return successors, (61), 46 states have call predecessors, (61), 46 states have call successors, (61) [2022-11-03 01:54:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 217 transitions. [2022-11-03 01:54:51,226 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 217 transitions. Word has length 105 [2022-11-03 01:54:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:51,227 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 217 transitions. [2022-11-03 01:54:51,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 12 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-03 01:54:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 217 transitions. [2022-11-03 01:54:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:54:51,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:51,230 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:51,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:51,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:54:51,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:51,449 INFO L85 PathProgramCache]: Analyzing trace with hash -159305907, now seen corresponding path program 4 times [2022-11-03 01:54:51,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:51,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568957657] [2022-11-03 01:54:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:51,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-03 01:54:58,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:58,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568957657] [2022-11-03 01:54:58,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568957657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:58,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686373054] [2022-11-03 01:54:58,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:54:58,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:58,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:58,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:54:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-03 01:54:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:58,688 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 01:54:59,234 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:54:59,234 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 01:54:59,241 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 01:54:59,265 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 01:54:59,386 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 01:54:59,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_140| input size 43 context size 43 output size 43 [2022-11-03 01:54:59,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591607238] [2022-11-03 01:54:59,390 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:54:59,390 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:59,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:59,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:59,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,500 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:54:59,500 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 62 [2022-11-03 01:54:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,615 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:54:59,616 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 01:54:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,896 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 01:54:59,928 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 01:54:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,960 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 01:54:59,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:59,995 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 01:55:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,062 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 01:55:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:00,124 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:55:00,125 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 01:55:00,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:00,204 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:55:00,204 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 01:55:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,379 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:55:00,380 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 01:55:00,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,431 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 01:55:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,456 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 01:55:00,526 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 01:55:00,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,563 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 01:55:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,589 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 01:55:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,620 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 71 treesize of output 19 [2022-11-03 01:55:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,651 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 01:55:00,666 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 01:55:00,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,715 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 01:55:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,743 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 01:55:00,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,769 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 01:55:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:00,793 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 01:55:13,029 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 19 for LOIs [2022-11-03 01:55:13,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 01:55:13,107 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:55:13,961 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:55:13,963 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:55:13,983 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:55:14,065 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:45,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12935#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 24))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 16)) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_259|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_259| 24)) 0))) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75| Int)) (and (<= 0 |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) 0) 16) (= |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) 0))) 1 0) 0) 0 1) 1) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) 0) 16) (= |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (not (= (mod (ite (= |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75| 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) 0) 16) (= |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_#in~list#1.base_BEFORE_CALL_75|) 0))) 1 0) 0) 0 1)))) (= |__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 01:55:45,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:45,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:45,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-03 01:55:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514776223] [2022-11-03 01:55:45,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:45,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:55:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:55:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3787, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 01:55:45,497 INFO L87 Difference]: Start difference. First operand 157 states and 217 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 12 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2022-11-03 01:55:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:51,578 INFO L93 Difference]: Finished difference Result 347 states and 550 transitions. [2022-11-03 01:55:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:55:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 12 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) Word has length 111 [2022-11-03 01:55:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:51,583 INFO L225 Difference]: With dead ends: 347 [2022-11-03 01:55:51,584 INFO L226 Difference]: Without dead ends: 244 [2022-11-03 01:55:51,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 82 SyntacticMatches, 15 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=351, Invalid=5655, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 01:55:51,588 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 232 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:51,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 2075 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 01:55:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-03 01:55:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 192. [2022-11-03 01:55:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.233644859813084) internal successors, (132), 113 states have internal predecessors, (132), 64 states have call successors, (64), 16 states have call predecessors, (64), 20 states have return successors, (92), 62 states have call predecessors, (92), 63 states have call successors, (92) [2022-11-03 01:55:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 288 transitions. [2022-11-03 01:55:51,729 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 288 transitions. Word has length 111 [2022-11-03 01:55:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:51,730 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 288 transitions. [2022-11-03 01:55:51,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 12 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2022-11-03 01:55:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 288 transitions. [2022-11-03 01:55:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 01:55:51,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:51,733 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:51,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:51,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:55:51,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1586178762, now seen corresponding path program 5 times [2022-11-03 01:55:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066392956] [2022-11-03 01:55:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:51,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-03 01:55:56,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066392956] [2022-11-03 01:55:56,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066392956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609310336] [2022-11-03 01:55:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:56,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:56,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:56,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:56,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:55:56,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:55:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:56,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:55:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:57,055 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 01:55:57,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 01:55:57,074 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 10 treesize of output 9 [2022-11-03 01:55:57,084 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 16 treesize of output 15 [2022-11-03 01:55:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:57,115 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 63 treesize of output 13 [2022-11-03 01:55:57,120 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 13 treesize of output 9 [2022-11-03 01:56:18,663 WARN L234 SmtUtils]: Spent 17.18s 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 01:56:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 01:56:44,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-03 01:56:50,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609310336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:50,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283837915] [2022-11-03 01:56:50,397 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:56:50,397 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:50,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:50,398 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:50,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,503 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:56:50,503 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 62 [2022-11-03 01:56:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,609 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:56:50,610 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 01:56:50,883 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 01:56:50,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,908 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 01:56:50,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,956 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 01:56:50,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,996 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 01:56:51,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:56:51,098 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:56:51,099 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 01:56:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,236 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:56:51,236 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 01:56:51,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,265 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 01:56:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,302 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 01:56:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,334 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 01:56:51,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:56:51,373 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 01:56:51,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:56:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,456 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 01:56:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,488 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 47 treesize of output 13 [2022-11-03 01:56:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,522 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 47 treesize of output 13 [2022-11-03 01:56:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,545 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 01:56:51,564 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 01:56:51,579 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 01:56:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,630 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 01:56:51,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,650 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 01:56:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,668 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 01:56:51,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,687 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 01:57:02,979 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 19 for LOIs [2022-11-03 01:57:03,015 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-03 01:57:03,057 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 01:57:03,823 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:57:03,825 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:57:03,843 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:57:03,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:45,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14531#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 16)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_301|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_301| 24)) 0))) (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223| Int)) (and (not (= (mod (ite (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223| 0) 0 1) 256) 0)) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) 0) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) 0) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) 0))) 1 0) 0) 0 1)) (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) 0) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|) 0))) 1 0) 0) 0 1) 1) (<= 0 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_223|))) (= ~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 01:57:45,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:45,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:45,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 7] total 34 [2022-11-03 01:57:45,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959301781] [2022-11-03 01:57:45,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 01:57:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 01:57:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=4541, Unknown=3, NotChecked=0, Total=4830 [2022-11-03 01:57:45,010 INFO L87 Difference]: Start difference. First operand 192 states and 288 transitions. Second operand has 34 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 17 states have call successors, (49), 5 states have call predecessors, (49), 9 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-11-03 01:58:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:03,355 INFO L93 Difference]: Finished difference Result 398 states and 583 transitions. [2022-11-03 01:58:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 01:58:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 17 states have call successors, (49), 5 states have call predecessors, (49), 9 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) Word has length 112 [2022-11-03 01:58:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:03,360 INFO L225 Difference]: With dead ends: 398 [2022-11-03 01:58:03,360 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 01:58:03,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 264 SyntacticMatches, 34 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 99.8s TimeCoverageRelationStatistics Valid=528, Invalid=9563, Unknown=9, NotChecked=0, Total=10100 [2022-11-03 01:58:03,365 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 105 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:03,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1979 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1183 Invalid, 0 Unknown, 240 Unchecked, 1.8s Time] [2022-11-03 01:58:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 01:58:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 213. [2022-11-03 01:58:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 125 states have (on average 1.264) internal successors, (158), 130 states have internal predecessors, (158), 64 states have call successors, (64), 21 states have call predecessors, (64), 23 states have return successors, (80), 61 states have call predecessors, (80), 63 states have call successors, (80) [2022-11-03 01:58:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 302 transitions. [2022-11-03 01:58:03,492 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 302 transitions. Word has length 112 [2022-11-03 01:58:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:03,493 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 302 transitions. [2022-11-03 01:58:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 17 states have call successors, (49), 5 states have call predecessors, (49), 9 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-11-03 01:58:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 302 transitions. [2022-11-03 01:58:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:58:03,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:03,496 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:03,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:03,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:58:03,713 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -432805745, now seen corresponding path program 1 times [2022-11-03 01:58:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:03,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360110355] [2022-11-03 01:58:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 01:58:08,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:08,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360110355] [2022-11-03 01:58:08,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360110355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:08,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791433782] [2022-11-03 01:58:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:08,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:08,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:08,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:58:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 174 conjunts are in the unsatisfiable core [2022-11-03 01:58:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:08,869 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 01:58:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:08,875 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 01:58:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:08,986 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:58:08,987 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 1 case distinctions, treesize of input 17 treesize of output 25 [2022-11-03 01:58:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:09,025 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 22 treesize of output 24 [2022-11-03 01:58:09,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:09,052 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:58:09,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-03 01:58:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:09,139 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 01:58:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:09,143 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 01:58:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 81 proven. 84 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:58:17,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:31,769 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:58:31,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2022-11-03 01:58:31,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791433782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697972028] [2022-11-03 01:58:31,988 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 01:58:31,988 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:31,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:58:31,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:58:31,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,128 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 01:58:32,129 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 62 [2022-11-03 01:58:32,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,245 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 01:58:32,245 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 01:58:32,536 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 01:58:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,562 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 01:58:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,592 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 01:58:32,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,626 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 01:58:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,800 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 01:58:32,800 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 01:58:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,835 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 01:58:32,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:32,900 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:58:32,901 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 01:58:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,942 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 01:58:32,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:32,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:33,011 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 01:58:33,011 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 01:58:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,182 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 01:58:33,182 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 01:58:33,247 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 01:58:33,273 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 01:58:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,300 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 01:58:33,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,324 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 01:58:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,351 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 01:58:33,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,376 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 01:58:33,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,412 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 01:58:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,431 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 01:58:33,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,484 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 35 treesize of output 7 [2022-11-03 01:58:33,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:33,510 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 01:58:38,908 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 34 for LOIs [2022-11-03 01:58:39,038 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-03 01:58:39,054 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 20 for LOIs [2022-11-03 01:58:39,961 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 01:58:39,963 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 01:58:39,987 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 01:58:40,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:04,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16153#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:04,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:04,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:59:04,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 38] total 55 [2022-11-03 01:59:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690632023] [2022-11-03 01:59:04,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 01:59:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 01:59:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=11681, Unknown=1, NotChecked=0, Total=12210 [2022-11-03 01:59:04,249 INFO L87 Difference]: Start difference. First operand 213 states and 302 transitions. Second operand has 55 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 21 states have call successors, (39), 8 states have call predecessors, (39), 13 states have return successors, (38), 20 states have call predecessors, (38), 21 states have call successors, (38) [2022-11-03 01:59:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:13,688 INFO L93 Difference]: Finished difference Result 406 states and 545 transitions. [2022-11-03 01:59:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-03 01:59:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 21 states have call successors, (39), 8 states have call predecessors, (39), 13 states have return successors, (38), 20 states have call predecessors, (38), 21 states have call successors, (38) Word has length 115 [2022-11-03 01:59:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:13,692 INFO L225 Difference]: With dead ends: 406 [2022-11-03 01:59:13,692 INFO L226 Difference]: Without dead ends: 253 [2022-11-03 01:59:13,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 186 SyntacticMatches, 26 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8467 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=940, Invalid=20520, Unknown=2, NotChecked=0, Total=21462 [2022-11-03 01:59:13,696 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 72 mSDsluCounter, 2968 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1154 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:13,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 2793 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 885 Invalid, 0 Unknown, 1154 Unchecked, 1.5s Time] [2022-11-03 01:59:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-03 01:59:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 205. [2022-11-03 01:59:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 127 states have internal predecessors, (147), 58 states have call successors, (58), 21 states have call predecessors, (58), 25 states have return successors, (66), 56 states have call predecessors, (66), 57 states have call successors, (66) [2022-11-03 01:59:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 271 transitions. [2022-11-03 01:59:13,828 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 271 transitions. Word has length 115 [2022-11-03 01:59:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:13,829 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 271 transitions. [2022-11-03 01:59:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 21 states have call successors, (39), 8 states have call predecessors, (39), 13 states have return successors, (38), 20 states have call predecessors, (38), 21 states have call successors, (38) [2022-11-03 01:59:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 271 transitions. [2022-11-03 01:59:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 01:59:13,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:13,832 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:13,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:14,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:59:14,049 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash -119767694, now seen corresponding path program 2 times [2022-11-03 01:59:14,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:14,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96589257] [2022-11-03 01:59:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:14,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 01:59:20,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96589257] [2022-11-03 01:59:20,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96589257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178080878] [2022-11-03 01:59:20,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:59:20,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:20,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:20,391 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:20,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbccc93-3416-44e4-8d37-b397bb359b4b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:59:21,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:59:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-03 01:59:21,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:21,289 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 01:59:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:21,296 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 01:59:21,311 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 01:59:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:21,318 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 01:59:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:21,440 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:59:21,440 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 1 case distinctions, treesize of input 116 treesize of output 69 [2022-11-03 01:59:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:21,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:21,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:21,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-11-03 01:59:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 01:59:29,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:37,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:37,469 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 1 case distinctions, treesize of input 1085 treesize of output 902 [2022-11-03 01:59:37,480 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:37,481 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 1133 treesize of output 950 [2022-11-03 01:59:40,433 INFO L356 Elim1Store]: treesize reduction 271, result has 65.9 percent of original size [2022-11-03 01:59:40,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 24 new quantified variables, introduced 91 case distinctions, treesize of input 126033 treesize of output 103466 [2022-11-03 02:01:21,122 WARN L234 SmtUtils]: Spent 1.62m on a formula simplification. DAG size of input: 2476 DAG size of output: 1124 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:01:21,125 INFO L356 Elim1Store]: treesize reduction 8002, result has 36.2 percent of original size [2022-11-03 02:01:21,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 49 new quantified variables, introduced 595 case distinctions, treesize of input 5913405 treesize of output 5302614 [2022-11-03 02:01:42,150 WARN L234 SmtUtils]: Spent 21.00s on a formula simplification that was a NOOP. DAG size: 11879 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:02:01,391 WARN L234 SmtUtils]: Spent 19.07s on a formula simplification that was a NOOP. DAG size: 11759 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)