./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:26:09,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:26:09,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:26:09,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:26:09,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:26:09,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:26:09,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:26:09,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:26:09,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:26:09,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:26:09,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:26:09,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:26:09,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:26:09,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:26:09,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:26:09,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:26:09,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:26:09,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:26:09,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:26:09,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:26:09,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:26:09,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:26:09,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:26:09,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:26:09,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:26:09,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:26:09,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:26:09,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:26:09,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:26:09,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:26:09,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:26:09,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:26:09,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:26:09,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:26:09,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:26:09,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:26:09,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:26:09,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:26:09,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:26:09,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:26:09,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:26:09,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 11:26:09,641 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:26:09,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:26:09,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:26:09,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:26:09,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:26:09,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:26:09,642 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:26:09,643 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:26:09,643 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:26:09,643 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:26:09,643 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:26:09,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:26:09,643 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:26:09,643 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:26:09,644 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:26:09,644 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:26:09,644 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:26:09,644 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:26:09,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:26:09,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:26:09,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:26:09,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:26:09,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:26:09,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:26:09,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:26:09,646 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:26:09,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:26:09,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:26:09,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:26:09,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:26:09,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:26:09,647 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:26:09,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:26:09,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:26:09,647 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:26:09,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:26:09,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:26:09,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:26:09,648 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_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-12-14 11:26:09,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:26:09,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:26:09,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:26:09,858 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:26:09,858 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:26:09,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-12-14 11:26:12,452 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:26:12,858 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:26:12,859 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-12-14 11:26:12,878 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/data/f6926f483/e4ee4489839b487d91431d72d34caf41/FLAG36de9bce2 [2022-12-14 11:26:12,890 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/data/f6926f483/e4ee4489839b487d91431d72d34caf41 [2022-12-14 11:26:12,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:26:12,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:26:12,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:26:12,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:26:12,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:26:12,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:12" (1/1) ... [2022-12-14 11:26:12,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c052fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:12, skipping insertion in model container [2022-12-14 11:26:12,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:12" (1/1) ... [2022-12-14 11:26:12,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:26:12,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:26:13,138 WARN L237 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_b78c7ab0-1a51-48c1-8373-55e57128a03a/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-12-14 11:26:13,144 WARN L237 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_b78c7ab0-1a51-48c1-8373-55e57128a03a/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-12-14 11:26:13,686 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 11:26:13,690 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,690 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,691 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,691 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,702 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,703 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,704 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,705 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,706 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,707 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,707 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,708 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:13,769 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:26:13,769 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:26:13,770 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:26:13,774 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 11:26:13,775 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 11:26:13,775 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 11:26:13,992 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 11:26:13,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 11:26:13,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 11:26:13,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 11:26:13,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 11:26:13,996 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 11:26:13,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 11:26:13,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 11:26:13,998 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 11:26:13,998 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 11:26:13,999 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 11:26:14,117 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 11:26:14,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:26:14,155 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:26:14,166 WARN L237 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_b78c7ab0-1a51-48c1-8373-55e57128a03a/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-12-14 11:26:14,166 WARN L237 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_b78c7ab0-1a51-48c1-8373-55e57128a03a/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-12-14 11:26:14,207 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 11:26:14,211 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,211 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,212 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,212 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,213 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,221 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,222 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,223 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,224 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,225 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,225 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,226 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,226 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:26:14,234 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:26:14,234 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:26:14,235 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:26:14,239 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 11:26:14,240 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 11:26:14,241 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 11:26:14,265 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 11:26:14,266 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 11:26:14,267 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 11:26:14,268 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 11:26:14,269 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 11:26:14,269 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 11:26:14,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 11:26:14,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 11:26:14,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 11:26:14,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 11:26:14,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 11:26:14,296 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 11:26:14,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:26:14,559 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:26:14,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14 WrapperNode [2022-12-14 11:26:14,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:26:14,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:26:14,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:26:14,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:26:14,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,626 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-12-14 11:26:14,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:26:14,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:26:14,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:26:14,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:26:14,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:26:14,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:26:14,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:26:14,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:26:14,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (1/1) ... [2022-12-14 11:26:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:26:14,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:14,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:26:14,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:26:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:26:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:26:14,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:26:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 11:26:14,712 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 11:26:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 11:26:14,713 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:26:14,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 11:26:14,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 11:26:14,713 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 11:26:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:26:14,907 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:26:14,910 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:26:15,110 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:26:15,187 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:26:15,187 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:26:15,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:15 BoogieIcfgContainer [2022-12-14 11:26:15,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:26:15,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:26:15,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:26:15,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:26:15,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:26:12" (1/3) ... [2022-12-14 11:26:15,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6513b186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:15, skipping insertion in model container [2022-12-14 11:26:15,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:14" (2/3) ... [2022-12-14 11:26:15,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6513b186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:15, skipping insertion in model container [2022-12-14 11:26:15,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:15" (3/3) ... [2022-12-14 11:26:15,198 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-12-14 11:26:15,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:26:15,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:26:15,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:26:15,260 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;@784e4ee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:26:15,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:26:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 11:26:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 11:26:15,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:15,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:15,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1901947457, now seen corresponding path program 1 times [2022-12-14 11:26:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055571585] [2022-12-14 11:26:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:15,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:26:15,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055571585] [2022-12-14 11:26:15,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055571585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:15,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907616261] [2022-12-14 11:26:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:15,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:15,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:15,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:26:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:15,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 11:26:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:16,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 11:26:16,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 11:26:16,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:16,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:16,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 11:26:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:16,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 11:26:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:26:18,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:26:18,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907616261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:18,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:26:18,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-12-14 11:26:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034656742] [2022-12-14 11:26:18,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:18,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:26:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:26:18,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:26:18,138 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:26:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:18,850 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-12-14 11:26:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:26:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-12-14 11:26:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:18,857 INFO L225 Difference]: With dead ends: 124 [2022-12-14 11:26:18,857 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 11:26:18,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:26:18,861 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:18,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 226 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:26:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 11:26:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-12-14 11:26:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 11:26:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2022-12-14 11:26:18,898 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 37 [2022-12-14 11:26:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:18,898 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2022-12-14 11:26:18,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:26:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2022-12-14 11:26:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 11:26:18,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:18,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:18,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:26:19,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 11:26:19,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:19,103 INFO L85 PathProgramCache]: Analyzing trace with hash -25443914, now seen corresponding path program 1 times [2022-12-14 11:26:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376040684] [2022-12-14 11:26:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:19,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:26:19,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376040684] [2022-12-14 11:26:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376040684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712720645] [2022-12-14 11:26:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:19,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:19,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:19,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:26:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 11:26:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:19,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 11:26:19,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 11:26:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 11:26:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 11:26:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 11:26:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 11:26:19,822 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 11:26:19,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-12-14 11:26:19,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-12-14 11:26:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 11:26:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-12-14 11:26:19,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 11:26:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:19,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-12-14 11:26:19,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 11:26:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:26:21,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:24,635 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) (.cse2 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-12-14 11:26:25,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-12-14 11:26:25,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 137 [2022-12-14 11:26:25,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 128 [2022-12-14 11:26:25,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 126 [2022-12-14 11:26:25,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-12-14 11:26:25,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 516 treesize of output 444 [2022-12-14 11:26:25,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 314 [2022-12-14 11:26:25,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 310 [2022-12-14 11:26:25,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 11:26:25,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 11:26:25,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2022-12-14 11:26:25,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 79 [2022-12-14 11:26:25,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:26:25,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 11:26:25,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:25,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2022-12-14 11:26:25,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,706 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 11:26:25,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-12-14 11:26:25,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:26:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,728 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 11:26:25,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-12-14 11:26:25,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,737 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 11:26:25,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-12-14 11:26:25,744 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:26:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:25,756 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 11:26:25,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-12-14 11:26:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-12-14 11:26:25,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712720645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747637834] [2022-12-14 11:26:25,889 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 11:26:25,890 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:25,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:25,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:25,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:25,963 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 11:26:25,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-12-14 11:26:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,017 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:26:26,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:26:26,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:26:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:26:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:26:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:26:26,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,443 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 11:26:26,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 11:26:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:26:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:26:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:26,542 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 11:26:26,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 11:26:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,625 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:26:26,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:26:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:26,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:26:26,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:26:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:26:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 11:26:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:26:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:26:26,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:26:26,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:26:26,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:26:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:26:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:26,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:26:27,335 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-12-14 11:26:27,488 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-12-14 11:26:27,525 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:26:27,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1747637834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:29,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:26:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-12-14 11:26:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135018526] [2022-12-14 11:26:29,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:26:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:26:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=818, Unknown=16, NotChecked=58, Total=992 [2022-12-14 11:26:29,805 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:26:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:31,202 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2022-12-14 11:26:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:26:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-12-14 11:26:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:31,205 INFO L225 Difference]: With dead ends: 141 [2022-12-14 11:26:31,205 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 11:26:31,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=121, Invalid=989, Unknown=16, NotChecked=64, Total=1190 [2022-12-14 11:26:31,206 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:31,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 171 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:26:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 11:26:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-12-14 11:26:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 68 states have internal predecessors, (87), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 11:26:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-12-14 11:26:31,229 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 38 [2022-12-14 11:26:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:31,229 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-12-14 11:26:31,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:26:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-12-14 11:26:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 11:26:31,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:31,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:31,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:26:31,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:31,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 370097554, now seen corresponding path program 1 times [2022-12-14 11:26:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:31,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457091461] [2022-12-14 11:26:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:31,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:26:31,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:31,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457091461] [2022-12-14 11:26:31,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457091461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:31,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647279278] [2022-12-14 11:26:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:31,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:31,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:31,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:26:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:31,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:26:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:26:31,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:26:31,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647279278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:31,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:26:31,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 11:26:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299040791] [2022-12-14 11:26:31,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:31,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:26:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:26:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:26:31,781 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:26:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:31,903 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-12-14 11:26:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:26:31,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2022-12-14 11:26:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:31,905 INFO L225 Difference]: With dead ends: 211 [2022-12-14 11:26:31,905 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 11:26:31,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:26:31,906 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:31,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:26:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 11:26:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-12-14 11:26:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 68 states have internal predecessors, (85), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 11:26:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2022-12-14 11:26:31,930 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 40 [2022-12-14 11:26:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:31,931 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2022-12-14 11:26:31,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:26:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2022-12-14 11:26:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 11:26:31,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:31,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:31,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:26:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:32,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1418872600, now seen corresponding path program 1 times [2022-12-14 11:26:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:32,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746074935] [2022-12-14 11:26:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:26:32,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:32,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746074935] [2022-12-14 11:26:32,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746074935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609479426] [2022-12-14 11:26:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:32,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:32,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:26:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:26:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:26:32,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:26:32,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609479426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:32,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:26:32,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 11:26:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290056860] [2022-12-14 11:26:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:32,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:26:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:26:32,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:26:32,559 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:26:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:32,721 INFO L93 Difference]: Finished difference Result 253 states and 338 transitions. [2022-12-14 11:26:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:26:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-12-14 11:26:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:32,723 INFO L225 Difference]: With dead ends: 253 [2022-12-14 11:26:32,723 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 11:26:32,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:26:32,725 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:32,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 177 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:26:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 11:26:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 107. [2022-12-14 11:26:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 70 states have internal predecessors, (87), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 11:26:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2022-12-14 11:26:32,766 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 42 [2022-12-14 11:26:32,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:32,767 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2022-12-14 11:26:32,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:26:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2022-12-14 11:26:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:26:32,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:32,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:32,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:26:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:32,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1987688764, now seen corresponding path program 1 times [2022-12-14 11:26:32,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:32,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183996224] [2022-12-14 11:26:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:26:33,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:33,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183996224] [2022-12-14 11:26:33,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183996224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:33,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768487436] [2022-12-14 11:26:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:33,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:33,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:33,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:26:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:26:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:26:33,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:26:33,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768487436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:33,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:26:33,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 11:26:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69557357] [2022-12-14 11:26:33,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:33,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:26:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:26:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:26:33,280 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:26:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:33,350 INFO L93 Difference]: Finished difference Result 229 states and 313 transitions. [2022-12-14 11:26:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:26:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-12-14 11:26:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:33,352 INFO L225 Difference]: With dead ends: 229 [2022-12-14 11:26:33,352 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 11:26:33,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:26:33,354 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:33,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:26:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 11:26:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-12-14 11:26:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 76 states have internal predecessors, (95), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 11:26:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-12-14 11:26:33,391 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 43 [2022-12-14 11:26:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:26:33,391 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-12-14 11:26:33,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:26:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-12-14 11:26:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 11:26:33,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:26:33,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:26:33,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:26:33,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:33,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:26:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:26:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash -747764591, now seen corresponding path program 1 times [2022-12-14 11:26:33,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:26:33,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238029749] [2022-12-14 11:26:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:26:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:26:33,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:26:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238029749] [2022-12-14 11:26:33,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238029749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:26:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869366593] [2022-12-14 11:26:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:26:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:26:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:26:33,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:26:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:26:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:26:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 99 conjunts are in the unsatisfiable core [2022-12-14 11:26:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:26:34,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 11:26:34,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:34,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 11:26:34,078 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 11:26:34,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-12-14 11:26:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:34,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-12-14 11:26:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:34,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-14 11:26:34,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 11:26:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:34,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-12-14 11:26:34,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 11:26:42,674 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:26:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:26:46,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:26:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:26:49,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869366593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:26:49,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274377531] [2022-12-14 11:26:49,531 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 11:26:49,532 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:26:49,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:26:49,532 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:26:49,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:26:49,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,586 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:26:49,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:26:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:26:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:26:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:26:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:26:49,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:26:49,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,889 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 11:26:49,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 11:26:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:26:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:49,974 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:26:49,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:26:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:26:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:26:50,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:26:50,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,441 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 11:26:50,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-12-14 11:26:50,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:50,717 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-12-14 11:26:50,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 676 treesize of output 685 [2022-12-14 11:26:50,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:50,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:26:50,964 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 11:26:50,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-12-14 11:26:51,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:51,037 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 11:26:51,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 633 [2022-12-14 11:26:51,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 654 treesize of output 633 [2022-12-14 11:26:51,155 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 11:26:51,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-12-14 11:26:52,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:26:52,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:26:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:26:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:26:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 11:26:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:26:52,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:26:52,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:26:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:26:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:26:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:26:52,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:26:53,517 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-12-14 11:26:53,925 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-12-14 11:26:53,986 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:26:54,006 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 11:26:54,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:26:58,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [274377531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:26:58,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:26:58,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 17, 8] total 46 [2022-12-14 11:26:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474564837] [2022-12-14 11:26:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:26:58,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:26:58,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:26:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 11:26:58,597 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:27:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:27:01,496 INFO L93 Difference]: Finished difference Result 231 states and 295 transitions. [2022-12-14 11:27:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:27:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-12-14 11:27:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:27:01,498 INFO L225 Difference]: With dead ends: 231 [2022-12-14 11:27:01,498 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 11:27:01,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=224, Invalid=2428, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:27:01,501 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:27:01,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:27:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 11:27:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-14 11:27:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3) internal successors, (104), 84 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-12-14 11:27:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2022-12-14 11:27:01,539 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 46 [2022-12-14 11:27:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:01,539 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2022-12-14 11:27:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:27:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2022-12-14 11:27:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 11:27:01,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:01,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:27:01,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:27:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:27:01,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 895175255, now seen corresponding path program 1 times [2022-12-14 11:27:01,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:01,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211811536] [2022-12-14 11:27:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:01,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:27:02,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211811536] [2022-12-14 11:27:02,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211811536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577401250] [2022-12-14 11:27:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:02,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:02,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:27:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-14 11:27:02,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:02,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 11:27:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:02,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 11:27:02,634 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-12-14 11:27:02,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 100 [2022-12-14 11:27:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:02,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 72 [2022-12-14 11:27:02,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 11:27:02,716 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse0 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_19 24)) (not (= .cse0 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))))) is different from true [2022-12-14 11:27:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:27:03,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:27:03,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:27:03,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-12-14 11:27:03,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:27:03,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 314 treesize of output 290 [2022-12-14 11:27:03,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2022-12-14 11:27:03,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2022-12-14 11:27:03,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 11:27:03,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-14 11:27:03,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:27:03,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-12-14 11:27:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:27:03,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577401250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:27:03,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92042817] [2022-12-14 11:27:03,734 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:27:03,735 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:27:03,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:27:03,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:27:03,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:27:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,778 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:27:03,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:27:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:27:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:27:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:27:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:03,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:27:04,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:27:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:27:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,098 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:27:04,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:27:04,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:27:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:27:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:27:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 11:27:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,559 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 11:27:04,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-12-14 11:27:04,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:04,808 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-12-14 11:27:04,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 680 treesize of output 689 [2022-12-14 11:27:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:04,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:27:05,042 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 11:27:05,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 652 treesize of output 682 [2022-12-14 11:27:05,151 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 11:27:05,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-12-14 11:27:05,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:05,208 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 11:27:05,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-12-14 11:27:05,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 11:27:21,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:27:21,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:27:21,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:27:21,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 11:27:21,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 11:27:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:27:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:27:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:27:21,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:27:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:21,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:27:22,027 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-12-14 11:27:22,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 154 for LOIs [2022-12-14 11:27:22,768 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:27:22,789 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:27:22,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:27:26,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [92042817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:27:26,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:27:26,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 12, 11] total 46 [2022-12-14 11:27:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550952466] [2022-12-14 11:27:26,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:27:26,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:27:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:27:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:27:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1806, Unknown=16, NotChecked=86, Total=2070 [2022-12-14 11:27:26,542 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:27:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:27:30,224 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-12-14 11:27:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:27:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-12-14 11:27:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:27:30,226 INFO L225 Difference]: With dead ends: 257 [2022-12-14 11:27:30,226 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 11:27:30,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=268, Invalid=2570, Unknown=28, NotChecked=104, Total=2970 [2022-12-14 11:27:30,227 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:27:30,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 183 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:27:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 11:27:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2022-12-14 11:27:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 86 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-12-14 11:27:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2022-12-14 11:27:30,255 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 48 [2022-12-14 11:27:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:30,256 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2022-12-14 11:27:30,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:27:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2022-12-14 11:27:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:27:30,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:30,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:27:30,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 11:27:30,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:30,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1362027043, now seen corresponding path program 1 times [2022-12-14 11:27:30,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299544623] [2022-12-14 11:27:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:30,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:27:30,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:30,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299544623] [2022-12-14 11:27:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299544623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:30,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157084965] [2022-12-14 11:27:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:30,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:30,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:30,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:27:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 11:27:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:30,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 11:27:30,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:30,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 11:27:30,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:30,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 11:27:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:30,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 11:27:31,100 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 11:27:31,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-14 11:27:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:27:31,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:27:31,251 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_946 (Array Int Int)) (v_ArrVal_947 (Array Int Int)) (v_ArrVal_948 Int)) (not (= (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_946) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_947) |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_948)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2022-12-14 11:27:31,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:27:31,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:27:31,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:27:31,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-12-14 11:27:31,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-12-14 11:27:31,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-12-14 11:27:31,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 11:27:31,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:27:31,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-12-14 11:27:31,389 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 57 [2022-12-14 11:27:31,393 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 46 [2022-12-14 11:27:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-12-14 11:27:31,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157084965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:27:31,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361304741] [2022-12-14 11:27:31,490 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:27:31,490 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:27:31,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:27:31,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:27:31,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:27:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,524 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 11:27:31,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-12-14 11:27:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,571 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:27:31,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:27:31,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:27:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:27:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:27:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:27:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:27:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:31,870 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 11:27:31,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 11:27:31,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,935 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:27:31,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:27:31,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-12-14 11:27:31,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:31,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:27:32,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 11:27:32,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:27:32,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:27:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 11:27:32,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:27:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:27:32,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:27:32,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:27:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:27:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:27:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:27:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:27:32,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:27:33,888 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-12-14 11:27:33,908 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 11:27:34,441 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 11:27:34,442 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:27:34,454 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:27:34,494 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:27:39,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5068#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:27:39,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:27:39,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:27:39,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 11] total 24 [2022-12-14 11:27:39,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303894409] [2022-12-14 11:27:39,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:27:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:27:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:27:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:27:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2253, Unknown=1, NotChecked=96, Total=2550 [2022-12-14 11:27:39,365 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-12-14 11:27:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:27:40,419 INFO L93 Difference]: Finished difference Result 264 states and 346 transitions. [2022-12-14 11:27:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 11:27:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 49 [2022-12-14 11:27:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:27:40,421 INFO L225 Difference]: With dead ends: 264 [2022-12-14 11:27:40,421 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 11:27:40,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=304, Invalid=3359, Unknown=1, NotChecked=118, Total=3782 [2022-12-14 11:27:40,422 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 199 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:27:40,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 517 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1060 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2022-12-14 11:27:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 11:27:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2022-12-14 11:27:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 90 states have internal predecessors, (110), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-12-14 11:27:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-12-14 11:27:40,458 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 49 [2022-12-14 11:27:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:40,459 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-12-14 11:27:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-12-14 11:27:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-12-14 11:27:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 11:27:40,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:40,460 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 11:27:40,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:27:40,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:40,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:40,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:40,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1856383284, now seen corresponding path program 1 times [2022-12-14 11:27:40,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:40,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656957712] [2022-12-14 11:27:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:40,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:27:40,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656957712] [2022-12-14 11:27:40,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656957712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445937149] [2022-12-14 11:27:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:40,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:40,820 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:27:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:27:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:27:41,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:27:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445937149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:27:41,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:27:41,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 11:27:41,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892676310] [2022-12-14 11:27:41,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:27:41,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:27:41,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:27:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:27:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:27:41,040 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:27:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:27:41,196 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2022-12-14 11:27:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:27:41,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-12-14 11:27:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:27:41,198 INFO L225 Difference]: With dead ends: 251 [2022-12-14 11:27:41,198 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 11:27:41,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:27:41,198 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:27:41,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 176 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:27:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 11:27:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-12-14 11:27:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 90 states have internal predecessors, (108), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-12-14 11:27:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 165 transitions. [2022-12-14 11:27:41,233 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 165 transitions. Word has length 52 [2022-12-14 11:27:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:41,233 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 165 transitions. [2022-12-14 11:27:41,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:27:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 165 transitions. [2022-12-14 11:27:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:27:41,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:41,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:27:41,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:27:41,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:41,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1165451566, now seen corresponding path program 1 times [2022-12-14 11:27:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247760212] [2022-12-14 11:27:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:27:41,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:41,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247760212] [2022-12-14 11:27:41,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247760212] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:41,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691839010] [2022-12-14 11:27:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:41,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:41,632 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:41,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:27:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:27:41,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:27:41,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:27:41,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691839010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:27:41,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:27:41,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 11:27:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341553226] [2022-12-14 11:27:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:27:41,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:27:41,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:27:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:27:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:27:41,863 INFO L87 Difference]: Start difference. First operand 131 states and 165 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:27:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:27:42,065 INFO L93 Difference]: Finished difference Result 277 states and 347 transitions. [2022-12-14 11:27:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:27:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-12-14 11:27:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:27:42,067 INFO L225 Difference]: With dead ends: 277 [2022-12-14 11:27:42,067 INFO L226 Difference]: Without dead ends: 157 [2022-12-14 11:27:42,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:27:42,068 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:27:42,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 202 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:27:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-12-14 11:27:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2022-12-14 11:27:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 90 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-12-14 11:27:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2022-12-14 11:27:42,100 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 56 [2022-12-14 11:27:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:42,101 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2022-12-14 11:27:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:27:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2022-12-14 11:27:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 11:27:42,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:42,101 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 11:27:42,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:27:42,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:27:42,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1817261077, now seen corresponding path program 1 times [2022-12-14 11:27:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:42,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041687839] [2022-12-14 11:27:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 11:27:42,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041687839] [2022-12-14 11:27:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041687839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406808091] [2022-12-14 11:27:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:42,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:42,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:42,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:27:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 11:27:42,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:42,664 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 11:27:42,664 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 11:27:42,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 11:27:42,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 11:27:42,701 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 11:27:42,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 36 [2022-12-14 11:27:42,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:28:10,539 WARN L233 SmtUtils]: Spent 24.41s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:28:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:28:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:28:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:28:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406808091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:28:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404141559] [2022-12-14 11:28:36,672 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 11:28:36,672 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:28:36,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:28:36,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:28:36,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:28:36,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,718 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:28:36,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:28:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:28:36,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:28:36,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:28:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:28:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:28:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:36,997 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:28:36,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:28:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-12-14 11:28:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:28:37,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 11:28:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:28:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:28:37,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,530 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 11:28:37,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-12-14 11:28:37,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,600 INFO L321 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2022-12-14 11:28:37,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 672 treesize of output 637 [2022-12-14 11:28:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 658 treesize of output 637 [2022-12-14 11:28:37,793 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-12-14 11:28:37,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 645 treesize of output 656 [2022-12-14 11:28:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:37,975 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-12-14 11:28:37,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 690 treesize of output 693 [2022-12-14 11:28:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:38,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:28:38,113 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-12-14 11:28:38,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 668 [2022-12-14 11:28:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:28:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 11:28:49,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:28:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 11:28:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:28:49,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:28:49,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:28:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:28:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:28:49,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:28:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:28:49,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:28:50,298 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-12-14 11:28:50,856 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-12-14 11:28:50,890 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:28:50,903 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:28:50,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:28:56,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1404141559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:28:56,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:28:56,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 51 [2022-12-14 11:28:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406091266] [2022-12-14 11:28:56,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:28:56,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:28:56,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:28:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:28:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2249, Unknown=81, NotChecked=0, Total=2550 [2022-12-14 11:28:56,392 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:28:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:28:59,888 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-12-14 11:28:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 11:28:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-12-14 11:28:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:28:59,889 INFO L225 Difference]: With dead ends: 261 [2022-12-14 11:28:59,889 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 11:28:59,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=300, Invalid=3029, Unknown=93, NotChecked=0, Total=3422 [2022-12-14 11:28:59,890 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:28:59,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 143 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:28:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 11:28:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2022-12-14 11:28:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 90 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2022-12-14 11:28:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-12-14 11:28:59,928 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 60 [2022-12-14 11:28:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:28:59,928 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-12-14 11:28:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:28:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-12-14 11:28:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:28:59,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:28:59,929 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:28:59,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:29:00,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:29:00,130 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:29:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:00,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1037523843, now seen corresponding path program 1 times [2022-12-14 11:29:00,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:29:00,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386580771] [2022-12-14 11:29:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:29:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 11:29:00,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:29:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386580771] [2022-12-14 11:29:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386580771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:29:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395268574] [2022-12-14 11:29:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:29:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:29:00,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:29:00,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:29:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 11:29:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:29:00,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:29:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 11:29:00,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395268574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:29:00,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404088192] [2022-12-14 11:29:00,621 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:29:00,621 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:29:00,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:29:00,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:29:00,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:29:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,663 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:29:00,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:29:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:29:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:29:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:29:00,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:29:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:29:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:29:00,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,004 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:29:01,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:29:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:29:01,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 11:29:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-12-14 11:29:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:29:01,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,557 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 11:29:01,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-12-14 11:29:01,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:01,815 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-12-14 11:29:01,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 688 treesize of output 691 [2022-12-14 11:29:02,054 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 11:29:02,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-12-14 11:29:02,180 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 11:29:02,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-12-14 11:29:02,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:29:02,237 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 11:29:02,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-12-14 11:29:02,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-12-14 11:30:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2022-12-14 11:30:00,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:30:00,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:30:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:00,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 11:30:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:30:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:30:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:00,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:30:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:30:00,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:00,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:30:01,454 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-12-14 11:30:01,476 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-12-14 11:30:02,088 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 11:30:02,090 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:30:02,101 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:30:02,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:30:06,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8578#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 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 [2022-12-14 11:30:06,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:30:06,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:30:06,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-12-14 11:30:06,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543487210] [2022-12-14 11:30:06,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:06,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:30:06,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:06,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:30:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 11:30:06,235 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:30:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:06,443 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-12-14 11:30:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:30:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2022-12-14 11:30:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:06,444 INFO L225 Difference]: With dead ends: 261 [2022-12-14 11:30:06,444 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 11:30:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 11:30:06,445 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:06,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 554 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:30:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 11:30:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2022-12-14 11:30:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 94 states have internal predecessors, (107), 28 states have call successors, (28), 14 states have call predecessors, (28), 18 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2022-12-14 11:30:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2022-12-14 11:30:06,482 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 63 [2022-12-14 11:30:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:06,482 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2022-12-14 11:30:06,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:30:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2022-12-14 11:30:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 11:30:06,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:06,483 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:06,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:06,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:06,684 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2119530051, now seen corresponding path program 1 times [2022-12-14 11:30:06,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:06,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502468312] [2022-12-14 11:30:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:06,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 11:30:06,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:06,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502468312] [2022-12-14 11:30:06,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502468312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:06,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478617388] [2022-12-14 11:30:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:06,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:06,878 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:06,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:30:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 11:30:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:09,171 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0)))) is different from true [2022-12-14 11:30:09,733 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 11:30:09,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 11:30:09,737 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-14 11:30:09,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-12-14 11:30:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 11:30:09,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:10,080 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 11:30:10,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 11:30:10,087 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 11:30:10,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-12-14 11:30:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 11:30:10,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478617388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830707329] [2022-12-14 11:30:10,102 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:30:10,102 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:30:10,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:30:10,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:30:10,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:30:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,138 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 11:30:10,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-12-14 11:30:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,177 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:30:10,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:30:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:30:10,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:30:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:30:10,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:30:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:30:10,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:10,445 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 11:30:10,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 11:30:10,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,498 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:30:10,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:30:10,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-12-14 11:30:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 11:30:10,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:10,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:30:10,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 11:30:10,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 11:30:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 11:30:10,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:30:10,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:30:10,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:30:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:30:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:30:10,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:10,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:12,346 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-12-14 11:30:12,366 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 11:30:12,977 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 11:30:12,978 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:30:12,991 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:30:13,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:30:19,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9599#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|))) (= |#NULL.base| 0))' at error location [2022-12-14 11:30:19,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:30:19,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:30:19,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-12-14 11:30:19,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365514909] [2022-12-14 11:30:19,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 11:30:19,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 11:30:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-12-14 11:30:19,242 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-12-14 11:30:21,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:23,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:25,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:27,678 INFO L93 Difference]: Finished difference Result 396 states and 486 transitions. [2022-12-14 11:30:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 11:30:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 65 [2022-12-14 11:30:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:27,679 INFO L225 Difference]: With dead ends: 396 [2022-12-14 11:30:27,680 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 11:30:27,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=892, Invalid=7853, Unknown=1, NotChecked=184, Total=8930 [2022-12-14 11:30:27,681 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 187 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:27,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 531 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1273 Invalid, 3 Unknown, 137 Unchecked, 6.9s Time] [2022-12-14 11:30:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 11:30:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2022-12-14 11:30:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 117 states have (on average 1.205128205128205) internal successors, (141), 121 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-12-14 11:30:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 207 transitions. [2022-12-14 11:30:27,732 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 207 transitions. Word has length 65 [2022-12-14 11:30:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:27,732 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 207 transitions. [2022-12-14 11:30:27,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-12-14 11:30:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 207 transitions. [2022-12-14 11:30:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 11:30:27,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:27,733 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-12-14 11:30:27,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:30:27,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:27,935 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:30:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1166406477, now seen corresponding path program 2 times [2022-12-14 11:30:27,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:30:27,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921770569] [2022-12-14 11:30:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:27,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:30:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:30:28,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:30:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921770569] [2022-12-14 11:30:28,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921770569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:30:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233163953] [2022-12-14 11:30:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:30:28,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:28,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:30:28,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:30:28,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:30:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 11:30:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:28,953 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 11:30:28,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 11:30:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:30:33,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:30:35,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233163953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827319845] [2022-12-14 11:30:35,722 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:30:35,722 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:30:35,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:30:35,723 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:30:35,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:30:35,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,765 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:30:35,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:30:35,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:30:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:30:35,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:30:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:30:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:35,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:30:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:30:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,075 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 11:30:36,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 11:30:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:36,109 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 11:30:36,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 11:30:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:36,148 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 11:30:36,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 11:30:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,210 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:30:36,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 11:30:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-12-14 11:30:36,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:30:36,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:30:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:36,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 11:30:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 11:30:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 11:30:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:36,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 11:30:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 11:30:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:30:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 11:30:36,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:30:36,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 11:30:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 11:30:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:30:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:30:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:36,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 11:30:37,693 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-12-14 11:30:37,712 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 11:30:38,223 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 11:30:38,224 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:30:38,239 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:30:38,285 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:30:47,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10940#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:30:47,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:30:47,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:30:47,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 25 [2022-12-14 11:30:47,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460845707] [2022-12-14 11:30:47,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:47,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:30:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:30:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:30:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2452, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:30:47,808 INFO L87 Difference]: Start difference. First operand 172 states and 207 transitions. Second operand has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-12-14 11:30:49,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:51,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:53,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:55,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:30:57,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:31:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:02,427 INFO L93 Difference]: Finished difference Result 299 states and 366 transitions. [2022-12-14 11:31:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 11:31:02,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 66 [2022-12-14 11:31:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:02,428 INFO L225 Difference]: With dead ends: 299 [2022-12-14 11:31:02,429 INFO L226 Difference]: Without dead ends: 233 [2022-12-14 11:31:02,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=425, Invalid=4977, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 11:31:02,430 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 181 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 247 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:02,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 415 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1280 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2022-12-14 11:31:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-12-14 11:31:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 173. [2022-12-14 11:31:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-12-14 11:31:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2022-12-14 11:31:02,507 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 66 [2022-12-14 11:31:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:02,507 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2022-12-14 11:31:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-12-14 11:31:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2022-12-14 11:31:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 11:31:02,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:02,508 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:02,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:31:02,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:31:02,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1214424754, now seen corresponding path program 1 times [2022-12-14 11:31:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517551517] [2022-12-14 11:31:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:02,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 11:31:04,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:04,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517551517] [2022-12-14 11:31:04,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517551517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:04,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059696634] [2022-12-14 11:31:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:04,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:04,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:04,292 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:04,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:31:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:04,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-14 11:31:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:07,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:15,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059696634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225208264] [2022-12-14 11:31:15,946 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:31:15,946 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:15,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:15,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:15,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,110 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:31:16,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:31:16,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:31:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:31:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:31:16,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:31:16,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:31:16,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:31:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:31:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:31:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:16,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 11:31:23,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 144 for LOIs [2022-12-14 11:31:23,753 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 11:31:24,277 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-12-14 11:31:24,314 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:31:24,330 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:31:24,382 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:02,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12010#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 2)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 3)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 32))) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:02,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:02,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:02,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 41 [2022-12-14 11:32:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617852274] [2022-12-14 11:32:02,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 11:32:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 11:32:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=5415, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 11:32:02,292 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 11:32:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:14,175 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-12-14 11:32:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 11:32:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-12-14 11:32:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:14,177 INFO L225 Difference]: With dead ends: 269 [2022-12-14 11:32:14,177 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 11:32:14,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=856, Invalid=9244, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 11:32:14,179 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 278 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:14,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 669 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 11:32:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 11:32:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 173. [2022-12-14 11:32:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 122 states have internal predecessors, (139), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-12-14 11:32:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 205 transitions. [2022-12-14 11:32:14,258 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 205 transitions. Word has length 67 [2022-12-14 11:32:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:14,258 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 205 transitions. [2022-12-14 11:32:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 11:32:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 205 transitions. [2022-12-14 11:32:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 11:32:14,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:14,259 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:14,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:32:14,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:14,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash -318758414, now seen corresponding path program 1 times [2022-12-14 11:32:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962312528] [2022-12-14 11:32:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:14,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:32:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 11:32:14,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:14,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962312528] [2022-12-14 11:32:14,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962312528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:32:14,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:32:14,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:32:14,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783339552] [2022-12-14 11:32:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:32:14,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:32:14,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:32:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:32:14,744 INFO L87 Difference]: Start difference. First operand 173 states and 205 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 11:32:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:15,237 INFO L93 Difference]: Finished difference Result 195 states and 228 transitions. [2022-12-14 11:32:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:32:15,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-12-14 11:32:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:15,238 INFO L225 Difference]: With dead ends: 195 [2022-12-14 11:32:15,238 INFO L226 Difference]: Without dead ends: 193 [2022-12-14 11:32:15,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:32:15,238 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:15,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:32:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-14 11:32:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2022-12-14 11:32:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 128 states have internal predecessors, (145), 35 states have call successors, (35), 21 states have call predecessors, (35), 23 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2022-12-14 11:32:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 215 transitions. [2022-12-14 11:32:15,324 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 215 transitions. Word has length 70 [2022-12-14 11:32:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:15,324 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 215 transitions. [2022-12-14 11:32:15,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 11:32:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 215 transitions. [2022-12-14 11:32:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 11:32:15,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:15,326 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:15,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:32:15,326 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1543905359, now seen corresponding path program 2 times [2022-12-14 11:32:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65064157] [2022-12-14 11:32:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:32:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 11:32:17,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:17,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65064157] [2022-12-14 11:32:17,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65064157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:32:17,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572478768] [2022-12-14 11:32:17,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:32:17,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:17,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:17,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:32:17,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:32:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 11:32:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:43,800 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:32:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:32:44,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:46,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:46,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-12-14 11:32:46,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:32:46,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-12-14 11:32:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 11:32:46,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572478768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:46,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719872233] [2022-12-14 11:32:46,976 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 11:32:46,976 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:46,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:46,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:46,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,168 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 11:32:47,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 11:32:47,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 11:32:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:32:47,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 11:32:47,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 11:32:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 11:32:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 11:32:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 11:32:47,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 11:32:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 11:32:54,896 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 144 for LOIs [2022-12-14 11:32:55,087 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 11:32:55,663 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-12-14 11:32:55,696 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-12-14 11:32:55,712 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 11:32:55,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:33:28,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13767#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 16) 0) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) 16) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 1) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 8) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:33:28,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:33:28,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:33:28,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 36 [2022-12-14 11:33:28,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162407854] [2022-12-14 11:33:28,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:33:28,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:33:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:33:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:33:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3631, Unknown=7, NotChecked=0, Total=4032 [2022-12-14 11:33:28,621 INFO L87 Difference]: Start difference. First operand 183 states and 215 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-12-14 11:33:49,392 WARN L233 SmtUtils]: Spent 20.12s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:33:59,624 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:34:09,823 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:34:20,037 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:34:40,400 WARN L233 SmtUtils]: Spent 20.16s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:34:50,996 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:35:12,487 WARN L233 SmtUtils]: Spent 20.16s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:35:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:14,437 INFO L93 Difference]: Finished difference Result 277 states and 323 transitions. [2022-12-14 11:35:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 11:35:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-12-14 11:35:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:14,439 INFO L225 Difference]: With dead ends: 277 [2022-12-14 11:35:14,439 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 11:35:14,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 162.9s TimeCoverageRelationStatistics Valid=603, Invalid=5396, Unknown=7, NotChecked=0, Total=6006 [2022-12-14 11:35:14,440 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 172 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:14,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 878 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 11:35:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 11:35:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2022-12-14 11:35:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 120 states have internal predecessors, (131), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-12-14 11:35:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 194 transitions. [2022-12-14 11:35:14,556 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 194 transitions. Word has length 73 [2022-12-14 11:35:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 194 transitions. [2022-12-14 11:35:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-12-14 11:35:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 194 transitions. [2022-12-14 11:35:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 11:35:14,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:14,557 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:14,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:35:14,757 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1703578702, now seen corresponding path program 1 times [2022-12-14 11:35:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:14,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135395629] [2022-12-14 11:35:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 11:35:15,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135395629] [2022-12-14 11:35:15,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135395629] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:35:15,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:35:15,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:35:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108419865] [2022-12-14 11:35:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:35:15,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:35:15,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:35:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:35:15,054 INFO L87 Difference]: Start difference. First operand 172 states and 194 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:35:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:15,506 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2022-12-14 11:35:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:35:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-12-14 11:35:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:15,507 INFO L225 Difference]: With dead ends: 182 [2022-12-14 11:35:15,507 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 11:35:15,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:35:15,508 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:15,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:35:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 11:35:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-12-14 11:35:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.113821138211382) internal successors, (137), 126 states have internal predecessors, (137), 32 states have call successors, (32), 23 states have call predecessors, (32), 24 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-12-14 11:35:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 200 transitions. [2022-12-14 11:35:15,583 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 200 transitions. Word has length 76 [2022-12-14 11:35:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:15,583 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 200 transitions. [2022-12-14 11:35:15,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:35:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 200 transitions. [2022-12-14 11:35:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 11:35:15,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:15,584 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:15,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 11:35:15,584 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1471703719, now seen corresponding path program 1 times [2022-12-14 11:35:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049201949] [2022-12-14 11:35:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:15,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 11:35:19,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049201949] [2022-12-14 11:35:19,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049201949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988792823] [2022-12-14 11:35:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:19,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:19,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:19,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b78c7ab0-1a51-48c1-8373-55e57128a03a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:35:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 152 conjunts are in the unsatisfiable core [2022-12-14 11:35:19,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:19,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 11:35:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:19,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 11:35:19,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:35:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:19,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 11:35:20,129 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-12-14 11:35:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 106 [2022-12-14 11:35:20,178 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-12-14 11:35:20,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 111 [2022-12-14 11:35:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2022-12-14 11:35:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-12-14 11:35:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-12-14 11:35:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 11:35:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2022-12-14 11:35:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:20,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2022-12-14 11:35:20,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 11:35:20,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-12-14 11:35:20,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 11:35:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 43 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:35:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:14,990 WARN L233 SmtUtils]: Spent 27.24s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:36:15,620 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse0 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (+ .cse0 8)))))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)))) (let ((.cse6 (select (select .cse5 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= (select (select .cse5 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)) (+ .cse6 8)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) (= .cse6 0))))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)))) (let ((.cse7 (select (select .cse8 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse7 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select .cse8 .cse7) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 8))))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (and (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1953 Int)) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)) (forall ((v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse10 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)))) (select (select .cse9 .cse10) (+ (select (select .cse9 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 8))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) (= .cse10 0)))))) is different from false [2022-12-14 11:36:25,611 WARN L233 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 23 DAG size of output: 20 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:36:25,611 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-12-14 11:36:25,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1700 treesize of output 1423 [2022-12-14 11:36:25,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:07,078 WARN L233 SmtUtils]: Spent 41.45s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:37:07,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:37:07,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1394 treesize of output 1641 [2022-12-14 11:37:21,867 WARN L233 SmtUtils]: Spent 14.70s on a formula simplification. DAG size of input: 359 DAG size of output: 243 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:37:21,868 INFO L321 Elim1Store]: treesize reduction 418, result has 61.3 percent of original size [2022-12-14 11:37:21,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 17311 treesize of output 17189 [2022-12-14 11:37:22,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:37:25,264 INFO L321 Elim1Store]: treesize reduction 195, result has 53.5 percent of original size [2022-12-14 11:37:25,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 16482 treesize of output 11451 [2022-12-14 11:37:26,516 INFO L217 Elim1Store]: Index analysis took 643 ms [2022-12-14 11:37:28,623 INFO L321 Elim1Store]: treesize reduction 260, result has 8.5 percent of original size [2022-12-14 11:37:28,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 16 case distinctions, treesize of input 14660 treesize of output 14533