./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:13:03,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:13:03,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:13:03,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:13:03,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:13:03,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:13:03,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:13:03,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:13:03,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:13:03,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:13:03,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:13:03,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:13:03,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:13:03,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:13:03,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:13:03,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:13:03,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:13:03,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:13:03,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:13:03,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:13:03,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:13:03,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:13:03,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:13:03,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:13:03,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:13:03,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:13:03,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:13:03,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:13:03,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:13:03,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:13:03,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:13:03,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:13:03,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:13:03,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:13:03,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:13:03,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:13:03,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:13:03,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:13:03,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:13:03,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:13:03,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:13:03,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:13:03,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:13:03,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:13:03,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:13:03,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:13:03,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:13:03,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:13:03,297 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:13:03,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:13:03,298 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:13:03,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:13:03,299 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:13:03,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:13:03,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:13:03,301 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:13:03,301 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:13:03,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:13:03,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:13:03,302 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:13:03,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:13:03,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:13:03,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:13:03,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:13:03,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:13:03,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:13:03,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:13:03,305 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:13:03,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:13:03,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:13:03,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:13:03,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:03,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:13:03,307 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:13:03,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:13:03,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:13:03,308 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:13:03,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:13:03,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:13:03,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:13:03,309 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_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-11-19 07:13:03,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:13:03,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:13:03,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:13:03,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:13:03,640 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:13:03,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-19 07:13:03,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/data/02221ceb8/4fc24ca7931f4191a31ff17357d6d456/FLAG2a6f002f7 [2022-11-19 07:13:04,506 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:13:04,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-19 07:13:04,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/data/02221ceb8/4fc24ca7931f4191a31ff17357d6d456/FLAG2a6f002f7 [2022-11-19 07:13:04,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/data/02221ceb8/4fc24ca7931f4191a31ff17357d6d456 [2022-11-19 07:13:04,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:13:04,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:13:04,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:04,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:13:04,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:13:04,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:13:04" (1/1) ... [2022-11-19 07:13:04,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57fcdeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:04, skipping insertion in model container [2022-11-19 07:13:04,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:13:04" (1/1) ... [2022-11-19 07:13:04,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:13:04,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:13:05,166 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-19 07:13:05,175 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-19 07:13:06,215 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,217 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,219 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,221 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,225 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,255 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,260 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,268 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,269 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,271 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,272 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,273 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,274 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:06,681 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:13:06,683 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:13:06,684 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:13:06,686 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:13:06,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:13:06,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:13:06,689 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:13:06,690 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:13:06,690 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:13:06,693 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:13:06,913 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:13:06,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:06,998 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:13:07,031 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-19 07:13:07,032 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-19 07:13:07,135 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,136 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,136 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,137 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,137 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,146 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,146 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,148 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,148 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,150 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,151 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,151 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,152 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:13:07,201 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:13:07,202 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:13:07,203 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:13:07,204 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:13:07,206 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:13:07,206 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:13:07,207 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:13:07,216 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:13:07,217 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:13:07,217 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:13:07,254 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:13:07,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:07,547 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:13:07,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07 WrapperNode [2022-11-19 07:13:07,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:07,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:07,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:13:07,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:13:07,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,767 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-11-19 07:13:07,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:07,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:13:07,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:13:07,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:13:07,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,846 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:13:07,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:13:07,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:13:07,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:13:07,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (1/1) ... [2022-11-19 07:13:07,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:07,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:07,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:13:07,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:13:07,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:13:07,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:13:07,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:13:07,966 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-19 07:13:07,966 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-19 07:13:07,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:13:07,966 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-19 07:13:07,966 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-19 07:13:07,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:13:07,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:13:07,967 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-11-19 07:13:07,967 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-11-19 07:13:07,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:13:07,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:13:07,967 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-19 07:13:07,967 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-19 07:13:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:13:07,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:13:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:13:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:13:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:13:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 07:13:07,968 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 07:13:07,969 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-19 07:13:07,969 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-19 07:13:07,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:13:08,265 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:13:08,268 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:13:08,745 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:13:08,961 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:13:08,961 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:13:08,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:08 BoogieIcfgContainer [2022-11-19 07:13:08,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:13:08,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:13:08,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:13:08,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:13:08,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:13:04" (1/3) ... [2022-11-19 07:13:08,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6c3315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:08, skipping insertion in model container [2022-11-19 07:13:08,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:07" (2/3) ... [2022-11-19 07:13:08,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6c3315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:08, skipping insertion in model container [2022-11-19 07:13:08,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:08" (3/3) ... [2022-11-19 07:13:08,983 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-11-19 07:13:09,012 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:13:09,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:13:09,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:13:09,127 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;@10e0175f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:13:09,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:13:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 07:13:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 07:13:09,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:09,146 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:09,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931554, now seen corresponding path program 1 times [2022-11-19 07:13:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:09,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097524814] [2022-11-19 07:13:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:13:10,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097524814] [2022-11-19 07:13:10,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097524814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789399446] [2022-11-19 07:13:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:10,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:10,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:10,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:10,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:13:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:10,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-19 07:13:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:10,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 07:13:10,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 07:13:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-19 07:13:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-19 07:13:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:13:14,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:14,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789399446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:14,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:14,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-19 07:13:14,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062534463] [2022-11-19 07:13:14,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:14,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:13:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:13:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:13:14,889 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 07:13:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:15,321 INFO L93 Difference]: Finished difference Result 147 states and 212 transitions. [2022-11-19 07:13:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:13:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-11-19 07:13:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:15,342 INFO L225 Difference]: With dead ends: 147 [2022-11-19 07:13:15,342 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:13:15,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:13:15,356 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 15 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:15,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 275 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-19 07:13:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:13:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2022-11-19 07:13:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (33), 30 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-19 07:13:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2022-11-19 07:13:15,452 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 52 [2022-11-19 07:13:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:15,453 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2022-11-19 07:13:15,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 07:13:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2022-11-19 07:13:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:13:15,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:15,461 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:15,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:13:15,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 07:13:15,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:15,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1311656922, now seen corresponding path program 1 times [2022-11-19 07:13:15,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:15,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629623856] [2022-11-19 07:13:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:13:16,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629623856] [2022-11-19 07:13:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629623856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:16,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562551167] [2022-11-19 07:13:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:16,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:16,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:16,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:13:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-19 07:13:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:16,444 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 6 treesize of output 5 [2022-11-19 07:13:16,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 07:13:16,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 07:13:16,819 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:13:16,819 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:13:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:16,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-19 07:13:16,844 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 25 treesize of output 25 [2022-11-19 07:13:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:16,871 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-19 07:13:16,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 07:13:17,032 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 07:13:17,032 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 126 treesize of output 140 [2022-11-19 07:13:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,050 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 136 treesize of output 124 [2022-11-19 07:13:17,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,067 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 41 treesize of output 36 [2022-11-19 07:13:17,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 07:13:17,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-19 07:13:17,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:13:17,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 34 [2022-11-19 07:13:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:13:20,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:26,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Maybe an infinite loop [2022-11-19 07:13:26,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241012003] [2022-11-19 07:13:26,998 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:13:26,999 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:27,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:27,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:27,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,115 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 07:13:27,116 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 [2022-11-19 07:13:27,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,191 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:13:27,192 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 [2022-11-19 07:13:27,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:13:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:13:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:13:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:13:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:13:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:27,840 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:13:27,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:13:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:13:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,954 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:13:27,954 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 [2022-11-19 07:13:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,064 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:13:28,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:13:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:28,111 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 [2022-11-19 07:13:28,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:13:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:13:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:13:28,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:13:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:13:28,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:13:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:13:28,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:13:28,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:13:28,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:13:29,776 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-19 07:13:30,103 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 44 for LOIs [2022-11-19 07:13:30,223 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-19 07:13:30,550 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:13:30,596 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:13:30,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1241012003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:36,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:36,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 25 [2022-11-19 07:13:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064405875] [2022-11-19 07:13:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:13:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:13:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:13:36,087 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-19 07:13:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:36,468 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-11-19 07:13:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:13:36,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2022-11-19 07:13:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:36,471 INFO L225 Difference]: With dead ends: 174 [2022-11-19 07:13:36,472 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:13:36,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:13:36,474 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:36,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 443 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 120 Invalid, 0 Unknown, 267 Unchecked, 0.3s Time] [2022-11-19 07:13:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:13:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-11-19 07:13:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.1875) internal successors, (57), 49 states have internal predecessors, (57), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-19 07:13:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-11-19 07:13:36,505 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 53 [2022-11-19 07:13:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:36,506 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-11-19 07:13:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-19 07:13:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-11-19 07:13:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:13:36,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:36,508 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:36,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 07:13:36,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash -662497062, now seen corresponding path program 1 times [2022-11-19 07:13:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:36,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555190261] [2022-11-19 07:13:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:36,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:36,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:36,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555190261] [2022-11-19 07:13:36,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555190261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105872802] [2022-11-19 07:13:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:36,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:36,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:13:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:13:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:13:37,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:37,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105872802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:37,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:37,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-19 07:13:37,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963924621] [2022-11-19 07:13:37,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:13:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:37,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:13:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:13:37,293 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:13:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:37,554 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2022-11-19 07:13:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:13:37,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 54 [2022-11-19 07:13:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:37,557 INFO L225 Difference]: With dead ends: 158 [2022-11-19 07:13:37,557 INFO L226 Difference]: Without dead ends: 94 [2022-11-19 07:13:37,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:13:37,559 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 45 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:37,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 373 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-19 07:13:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-19 07:13:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-19 07:13:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2022-11-19 07:13:37,614 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 54 [2022-11-19 07:13:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:37,616 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2022-11-19 07:13:37,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:13:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2022-11-19 07:13:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:13:37,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:37,620 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:37,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:37,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash 630654178, now seen corresponding path program 1 times [2022-11-19 07:13:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639239910] [2022-11-19 07:13:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:38,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639239910] [2022-11-19 07:13:38,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639239910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396968785] [2022-11-19 07:13:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:38,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:38,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:38,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:13:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:13:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:13:38,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:38,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396968785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:38,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:38,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-19 07:13:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724800188] [2022-11-19 07:13:38,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:38,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:13:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:13:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:13:38,536 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:13:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:38,871 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2022-11-19 07:13:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:13:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2022-11-19 07:13:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:38,874 INFO L225 Difference]: With dead ends: 169 [2022-11-19 07:13:38,874 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 07:13:38,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:13:38,876 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 74 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:38,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 417 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 07:13:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-11-19 07:13:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-19 07:13:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-11-19 07:13:38,903 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 56 [2022-11-19 07:13:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:38,903 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-11-19 07:13:38,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:13:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-11-19 07:13:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:13:38,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:38,905 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:38,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:39,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1929682501, now seen corresponding path program 1 times [2022-11-19 07:13:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:39,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028287965] [2022-11-19 07:13:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:39,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:39,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028287965] [2022-11-19 07:13:39,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028287965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:39,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138907202] [2022-11-19 07:13:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:39,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:39,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:13:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:13:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:13:39,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138907202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:39,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:39,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-19 07:13:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720263533] [2022-11-19 07:13:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:39,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:13:39,683 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:13:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:39,761 INFO L93 Difference]: Finished difference Result 165 states and 207 transitions. [2022-11-19 07:13:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:39,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 57 [2022-11-19 07:13:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:39,767 INFO L225 Difference]: With dead ends: 165 [2022-11-19 07:13:39,768 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:13:39,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:13:39,770 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:39,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 147 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:13:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:13:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-11-19 07:13:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-19 07:13:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-11-19 07:13:39,810 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 57 [2022-11-19 07:13:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:39,811 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-11-19 07:13:39,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:13:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-11-19 07:13:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:13:39,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:39,816 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:39,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:40,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:40,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1947211257, now seen corresponding path program 1 times [2022-11-19 07:13:40,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:40,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867170498] [2022-11-19 07:13:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:13:40,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:40,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867170498] [2022-11-19 07:13:40,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867170498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:40,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488102840] [2022-11-19 07:13:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:40,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:40,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:40,275 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:40,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:13:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 07:13:40,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:40,593 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:13:40,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:13:40,609 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:13:40,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:13:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:13:46,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:13:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488102840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169872983] [2022-11-19 07:13:50,980 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-19 07:13:50,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:50,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:50,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:50,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,054 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:13:51,054 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 [2022-11-19 07:13:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,078 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 [2022-11-19 07:13:51,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:13:51,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:13:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,416 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 [2022-11-19 07:13:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:13:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 07:13:51,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 07:13:51,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:13:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:51,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:13:52,227 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 122 for LOIs [2022-11-19 07:13:52,394 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:13:52,396 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:13:52,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:58,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [169872983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:58,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:58,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 13, 7] total 32 [2022-11-19 07:13:58,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024131265] [2022-11-19 07:13:58,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:13:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:13:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:13:58,487 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 13 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:13:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:59,370 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2022-11-19 07:13:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:13:59,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 60 [2022-11-19 07:13:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:59,371 INFO L225 Difference]: With dead ends: 168 [2022-11-19 07:13:59,372 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 07:13:59,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:13:59,373 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 81 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:59,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 265 Invalid, 0 Unknown, 61 Unchecked, 0.8s Time] [2022-11-19 07:13:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 07:13:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-11-19 07:13:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 25 states have call successors, (25), 14 states have call predecessors, (25), 14 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-11-19 07:13:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2022-11-19 07:13:59,398 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 60 [2022-11-19 07:13:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:59,399 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2022-11-19 07:13:59,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:13:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2022-11-19 07:13:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:13:59,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:59,400 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:59,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:13:59,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:59,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1650262769, now seen corresponding path program 1 times [2022-11-19 07:13:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:59,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427364125] [2022-11-19 07:13:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:59,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:13:59,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427364125] [2022-11-19 07:13:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427364125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958693631] [2022-11-19 07:13:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:59,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:59,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:59,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:14:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 07:14:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:00,194 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 6 treesize of output 5 [2022-11-19 07:14:00,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:14:00,403 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:14:00,404 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:14:00,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:14:00,433 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:14:00,433 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:14:00,505 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 07:14:00,506 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 94 treesize of output 114 [2022-11-19 07:14:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,513 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 110 treesize of output 90 [2022-11-19 07:14:00,521 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 [2022-11-19 07:14:00,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 07:14:00,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-19 07:14:00,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:14:11,858 WARN L233 SmtUtils]: Spent 7.07s 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) [2022-11-19 07:14:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:14:19,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:14:23,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958693631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:23,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696118816] [2022-11-19 07:14:23,763 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-19 07:14:23,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:14:23,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:14:23,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:14:23,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:14:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:23,836 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:14:23,837 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 [2022-11-19 07:14:23,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:23,854 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 [2022-11-19 07:14:24,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:14:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:14:24,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:14:24,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:14:24,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:24,292 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:14:24,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:14:24,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,387 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:14:24,388 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 [2022-11-19 07:14:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,489 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:14:24,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:14:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,561 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 [2022-11-19 07:14:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,595 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 [2022-11-19 07:14:24,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:24,629 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 [2022-11-19 07:14:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:14:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,760 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 59 treesize of output 13 [2022-11-19 07:14:24,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,779 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 53 treesize of output 23 [2022-11-19 07:14:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,803 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 71 treesize of output 19 [2022-11-19 07:14:24,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:14:24,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:14:24,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:14:24,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:14:24,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:14:24,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:14:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:14:24,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:24,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:14:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:25,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:14:25,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:25,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:14:25,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:25,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:14:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:25,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:14:25,818 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-19 07:14:26,284 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-11-19 07:14:26,357 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-19 07:14:26,799 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-11-19 07:14:26,819 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:14:26,839 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-19 07:14:26,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:14:35,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1696118816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:35,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:35,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [6, 16, 7] total 53 [2022-11-19 07:14:35,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399907785] [2022-11-19 07:14:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:35,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:14:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:14:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2545, Unknown=1, NotChecked=0, Total=2756 [2022-11-19 07:14:35,334 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:14:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:36,925 INFO L93 Difference]: Finished difference Result 173 states and 205 transitions. [2022-11-19 07:14:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:14:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 61 [2022-11-19 07:14:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:36,928 INFO L225 Difference]: With dead ends: 173 [2022-11-19 07:14:36,928 INFO L226 Difference]: Without dead ends: 103 [2022-11-19 07:14:36,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 119 SyntacticMatches, 17 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=228, Invalid=2741, Unknown=1, NotChecked=0, Total=2970 [2022-11-19 07:14:36,930 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 50 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:36,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 398 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 310 Invalid, 0 Unknown, 423 Unchecked, 0.8s Time] [2022-11-19 07:14:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-19 07:14:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-11-19 07:14:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 59 states have internal predecessors, (65), 26 states have call successors, (26), 15 states have call predecessors, (26), 16 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2022-11-19 07:14:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-11-19 07:14:36,960 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 61 [2022-11-19 07:14:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:36,963 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-11-19 07:14:36,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:14:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-11-19 07:14:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:14:36,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:36,965 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:36,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:37,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:14:37,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash 575582167, now seen corresponding path program 1 times [2022-11-19 07:14:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:37,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163434122] [2022-11-19 07:14:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:37,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:14:38,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:38,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163434122] [2022-11-19 07:14:38,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163434122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:38,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978488044] [2022-11-19 07:14:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:38,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:38,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:38,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:14:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:38,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-19 07:14:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:38,719 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 6 treesize of output 5 [2022-11-19 07:14:38,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:14:38,963 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:14:38,963 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:14:38,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:14:38,987 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:14:38,988 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:14:39,076 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-19 07:14:39,077 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 73 treesize of output 99 [2022-11-19 07:14:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:39,084 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 85 treesize of output 71 [2022-11-19 07:14:39,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 07:14:39,103 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 70 treesize of output 23 [2022-11-19 07:14:39,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:14:42,822 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-19 07:14:42,822 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 40 treesize of output 1 [2022-11-19 07:14:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:14:42,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:43,255 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_771 Int) (v_ArrVal_769 (Array Int Int)) (v_ArrVal_770 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_769) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_770) |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_771)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 0))) is different from false [2022-11-19 07:14:43,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:14:43,266 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 [2022-11-19 07:14:43,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:14:43,285 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 316 treesize of output 292 [2022-11-19 07:14:43,305 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 [2022-11-19 07:14:43,322 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 [2022-11-19 07:14:43,433 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 [2022-11-19 07:14:43,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:14:43,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:14:43,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:14:43,499 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 90 treesize of output 82 [2022-11-19 07:14:45,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978488044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:45,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060233336] [2022-11-19 07:14:45,928 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:14:45,929 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:14:45,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:14:45,930 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:14:45,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:14:45,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,013 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:14:46,014 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 [2022-11-19 07:14:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,035 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 [2022-11-19 07:14:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:14:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:14:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:14:46,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:14:46,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,470 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:14:46,471 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 [2022-11-19 07:14:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:46,535 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:14:46,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:14:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 07:14:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,669 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:14:46,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:14:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,705 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 [2022-11-19 07:14:46,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:46,735 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 [2022-11-19 07:14:46,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:14:46,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:14:46,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:14:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:14:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:14:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:46,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 07:14:46,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:14:47,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:14:47,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:47,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:14:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,046 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 47 treesize of output 13 [2022-11-19 07:14:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 07:14:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:14:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:14:47,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:14:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:14:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:47,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:14:47,791 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-19 07:14:48,269 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-11-19 07:14:48,332 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-19 07:14:49,150 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-11-19 07:14:49,169 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:14:49,188 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:14:49,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:14:57,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2060233336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:57,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:14:57,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 14] total 50 [2022-11-19 07:14:57,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108737178] [2022-11-19 07:14:57,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:57,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:14:57,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:14:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3298, Unknown=2, NotChecked=116, Total=3660 [2022-11-19 07:14:57,941 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:14:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:59,635 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2022-11-19 07:14:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:14:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 63 [2022-11-19 07:14:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:59,637 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:14:59,637 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 07:14:59,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=270, Invalid=3638, Unknown=2, NotChecked=122, Total=4032 [2022-11-19 07:14:59,639 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 52 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:59,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 437 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 415 Invalid, 0 Unknown, 379 Unchecked, 0.9s Time] [2022-11-19 07:14:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 07:14:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2022-11-19 07:14:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-19 07:14:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2022-11-19 07:14:59,661 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 63 [2022-11-19 07:14:59,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:59,661 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2022-11-19 07:14:59,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:14:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2022-11-19 07:14:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:14:59,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:59,663 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:59,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:59,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:59,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash 658052454, now seen corresponding path program 1 times [2022-11-19 07:14:59,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437926199] [2022-11-19 07:14:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:15:01,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437926199] [2022-11-19 07:15:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437926199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:01,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824385530] [2022-11-19 07:15:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:01,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:01,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:01,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:15:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 07:15:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:01,779 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 6 treesize of output 5 [2022-11-19 07:15:01,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:15:01,973 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:15:01,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:15:01,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:15:02,001 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:15:02,001 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 11 treesize of output 11 [2022-11-19 07:15:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:02,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-19 07:15:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:02,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-19 07:15:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:15:02,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:03,169 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_896 Int) (v_ArrVal_894 (Array Int Int)) (v_ArrVal_895 (Array Int Int))) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_894) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_895) |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_896)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|)))) is different from false [2022-11-19 07:15:03,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:03,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:15:03,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:03,207 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 267 treesize of output 277 [2022-11-19 07:15:03,215 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 [2022-11-19 07:15:03,234 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 [2022-11-19 07:15:03,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:15:03,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:03,315 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 77 treesize of output 77 [2022-11-19 07:15:03,403 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 8 treesize of output 6 [2022-11-19 07:15:03,411 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 6 treesize of output 4 [2022-11-19 07:15:03,425 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 55 treesize of output 53 [2022-11-19 07:15:03,432 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 64 treesize of output 60 [2022-11-19 07:15:03,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824385530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:03,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162777504] [2022-11-19 07:15:03,800 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:15:03,801 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:15:03,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:15:03,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:15:03,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:15:03,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:03,896 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:15:03,896 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 [2022-11-19 07:15:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:03,919 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 [2022-11-19 07:15:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:15:04,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:15:04,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:15:04,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:15:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,340 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:15:04,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:15:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,373 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 [2022-11-19 07:15:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,404 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 [2022-11-19 07:15:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,429 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 [2022-11-19 07:15:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:04,460 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 [2022-11-19 07:15:04,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,496 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 [2022-11-19 07:15:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:04,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:04,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,106 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 07:15:05,107 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 666 treesize of output 675 [2022-11-19 07:15:05,591 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-11-19 07:15:05,591 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 684 [2022-11-19 07:15:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:05,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:05,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:05,948 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-19 07:15:05,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 690 treesize of output 693 [2022-11-19 07:15:06,087 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-11-19 07:15:06,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 645 treesize of output 656 [2022-11-19 07:15:06,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:06,169 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 07:15:06,169 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 [2022-11-19 07:15:06,206 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 656 treesize of output 635 [2022-11-19 07:15:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,313 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 71 treesize of output 19 [2022-11-19 07:15:07,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:15:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:15:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:15:07,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:15:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:15:07,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:15:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:15:07,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:15:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:15:07,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:07,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:15:08,174 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-19 07:15:09,031 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-11-19 07:15:09,306 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-19 07:15:09,343 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-19 07:15:10,188 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:15:10,189 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:15:10,206 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:15:10,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:15:28,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5821#(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.base_BEFORE_CALL_72| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| Int)) (and (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)))))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| Int)) (and (not (= 0 (mod (ite (= (ite (= (mod (ite (= (ite (and (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256))) (<= 0 (ite (= (ite (and (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0))) 1 0) 0) 0 1)) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) (not (= (mod (ite (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0))) 1 0) 0) 0 1) 1))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:15:28,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:15:28,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:15:28,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-19 07:15:28,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414988657] [2022-11-19 07:15:28,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:28,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:15:28,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:15:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4553, Unknown=1, NotChecked=136, Total=4970 [2022-11-19 07:15:28,431 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-19 07:15:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:29,128 INFO L93 Difference]: Finished difference Result 241 states and 304 transitions. [2022-11-19 07:15:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:15:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 64 [2022-11-19 07:15:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:29,130 INFO L225 Difference]: With dead ends: 241 [2022-11-19 07:15:29,130 INFO L226 Difference]: Without dead ends: 174 [2022-11-19 07:15:29,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 119 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=300, Invalid=4815, Unknown=1, NotChecked=140, Total=5256 [2022-11-19 07:15:29,133 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 32 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:29,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 913 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 445 Invalid, 0 Unknown, 189 Unchecked, 0.5s Time] [2022-11-19 07:15:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-19 07:15:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2022-11-19 07:15:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 44 states have call successors, (44), 22 states have call predecessors, (44), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-11-19 07:15:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 196 transitions. [2022-11-19 07:15:29,175 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 196 transitions. Word has length 64 [2022-11-19 07:15:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:29,175 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 196 transitions. [2022-11-19 07:15:29,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-19 07:15:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 196 transitions. [2022-11-19 07:15:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:15:29,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:29,177 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:29,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:29,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:29,380 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash 865821806, now seen corresponding path program 2 times [2022-11-19 07:15:29,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:29,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911910987] [2022-11-19 07:15:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:29,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:15:30,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:30,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911910987] [2022-11-19 07:15:30,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911910987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:30,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941640009] [2022-11-19 07:15:30,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:15:30,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:30,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:30,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:30,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:15:31,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:15:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-19 07:15:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:31,624 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:15:31,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-11-19 07:15:32,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 07:15:32,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 07:15:32,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,276 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-19 07:15:32,306 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:15:32,306 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 81 treesize of output 72 [2022-11-19 07:15:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,363 INFO L321 Elim1Store]: treesize reduction 78, result has 33.9 percent of original size [2022-11-19 07:15:32,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 07:15:32,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,396 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 07:15:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-19 07:15:32,600 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:15:32,600 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 2 case distinctions, treesize of input 67 treesize of output 67 [2022-11-19 07:15:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,636 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:15:32,636 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 2 case distinctions, treesize of input 26 treesize of output 36 [2022-11-19 07:15:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,645 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-19 07:15:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,671 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2022-11-19 07:15:32,757 INFO L321 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-11-19 07:15:32,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-11-19 07:15:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2022-11-19 07:15:32,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-19 07:15:32,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 32 [2022-11-19 07:15:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:32,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 50 [2022-11-19 07:15:51,047 WARN L233 SmtUtils]: Spent 12.36s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:15:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:15:58,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:16:04,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941640009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660322140] [2022-11-19 07:16:04,252 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:16:04,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:04,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:16:04,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:16:04,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:16:04,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,328 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 07:16:04,328 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 [2022-11-19 07:16:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,409 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:16:04,410 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 [2022-11-19 07:16:04,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:16:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:16:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:16:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:16:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,825 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:16:04,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:16:04,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:04,865 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 [2022-11-19 07:16:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,897 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 [2022-11-19 07:16:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,932 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 [2022-11-19 07:16:04,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,001 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 [2022-11-19 07:16:05,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,035 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 [2022-11-19 07:16:05,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,628 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 07:16:05,628 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 662 treesize of output 671 [2022-11-19 07:16:05,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:05,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:05,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:06,068 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-19 07:16:06,069 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 [2022-11-19 07:16:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:06,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:16:06,319 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-19 07:16:06,320 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 643 treesize of output 654 [2022-11-19 07:16:06,596 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-19 07:16:06,597 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 646 treesize of output 664 [2022-11-19 07:16:06,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:06,660 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 07:16:06,660 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 [2022-11-19 07:16:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:06,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:06,703 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 652 treesize of output 631 [2022-11-19 07:16:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:16:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:16:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 07:16:39,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 07:16:39,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:16:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:16:39,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:16:39,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:16:39,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:16:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:16:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:39,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:16:39,570 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 78 for LOIs [2022-11-19 07:16:40,438 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 101 for LOIs [2022-11-19 07:16:40,687 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2022-11-19 07:16:40,740 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 78 for LOIs [2022-11-19 07:16:41,610 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-19 07:16:41,612 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:16:41,634 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:16:41,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:01,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6888#(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|) (exists ((|v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45| Int) (|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| Int)) (and (<= 0 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (<= |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45| 0) (<= 0 (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1)) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1) 1) (not (= 0 (mod (ite (= (+ |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) 0) 0 1) 256))) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|))) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) (<= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 16))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-19 07:17:01,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:01,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:01,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 12] total 44 [2022-11-19 07:17:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690401759] [2022-11-19 07:17:01,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:01,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 07:17:01,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 07:17:01,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=5688, Unknown=1, NotChecked=0, Total=6006 [2022-11-19 07:17:01,796 INFO L87 Difference]: Start difference. First operand 160 states and 196 transitions. Second operand has 44 states, 36 states have (on average 2.5) internal successors, (90), 40 states have internal predecessors, (90), 19 states have call successors, (38), 8 states have call predecessors, (38), 14 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2022-11-19 07:17:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:12,970 INFO L93 Difference]: Finished difference Result 280 states and 353 transitions. [2022-11-19 07:17:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:17:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 2.5) internal successors, (90), 40 states have internal predecessors, (90), 19 states have call successors, (38), 8 states have call predecessors, (38), 14 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) Word has length 65 [2022-11-19 07:17:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:12,974 INFO L225 Difference]: With dead ends: 280 [2022-11-19 07:17:12,974 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 07:17:12,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 123 SyntacticMatches, 17 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3683 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=500, Invalid=9596, Unknown=4, NotChecked=0, Total=10100 [2022-11-19 07:17:12,978 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:12,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1013 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 520 Invalid, 0 Unknown, 187 Unchecked, 0.8s Time] [2022-11-19 07:17:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 07:17:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 166. [2022-11-19 07:17:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 101 states have internal predecessors, (115), 44 states have call successors, (44), 22 states have call predecessors, (44), 24 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2022-11-19 07:17:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2022-11-19 07:17:13,029 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 65 [2022-11-19 07:17:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:13,029 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2022-11-19 07:17:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 2.5) internal successors, (90), 40 states have internal predecessors, (90), 19 states have call successors, (38), 8 states have call predecessors, (38), 14 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2022-11-19 07:17:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2022-11-19 07:17:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:17:13,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:13,031 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:13,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:13,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:13,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 377460445, now seen corresponding path program 1 times [2022-11-19 07:17:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:13,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336971213] [2022-11-19 07:17:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:13,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-19 07:17:13,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336971213] [2022-11-19 07:17:13,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336971213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018360575] [2022-11-19 07:17:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:13,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:13,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:13,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:17:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:17:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:17:14,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:14,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018360575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:14,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:14,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 11 [2022-11-19 07:17:14,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712792753] [2022-11-19 07:17:14,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:14,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:17:14,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:17:14,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:14,044 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 9 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-19 07:17:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:14,410 INFO L93 Difference]: Finished difference Result 286 states and 361 transitions. [2022-11-19 07:17:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:17:14,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2022-11-19 07:17:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:14,412 INFO L225 Difference]: With dead ends: 286 [2022-11-19 07:17:14,412 INFO L226 Difference]: Without dead ends: 174 [2022-11-19 07:17:14,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:17:14,414 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 17 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 437 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-19 07:17:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2022-11-19 07:17:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 97 states have (on average 1.175257731958763) internal successors, (114), 101 states have internal predecessors, (114), 44 states have call successors, (44), 22 states have call predecessors, (44), 24 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2022-11-19 07:17:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2022-11-19 07:17:14,489 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 76 [2022-11-19 07:17:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:14,489 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2022-11-19 07:17:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-19 07:17:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2022-11-19 07:17:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 07:17:14,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:14,491 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:14,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:17:14,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1576417214, now seen corresponding path program 1 times [2022-11-19 07:17:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014733303] [2022-11-19 07:17:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:17:19,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:19,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014733303] [2022-11-19 07:17:19,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014733303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565138418] [2022-11-19 07:17:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:19,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:19,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:19,651 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:17:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-19 07:17:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:20,029 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 6 treesize of output 5 [2022-11-19 07:17:20,472 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:17:20,473 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:17:20,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:17:20,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:17:20,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 07:17:20,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:17:20,601 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-19 07:17:20,601 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 100 treesize of output 122 [2022-11-19 07:17:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:20,617 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 108 treesize of output 90 [2022-11-19 07:17:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:20,627 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 28 treesize of output 25 [2022-11-19 07:17:20,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 07:17:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:20,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-19 07:18:47,320 WARN L233 SmtUtils]: Spent 21.89s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:18:50,954 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse18 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse3 (+ .cse18 8)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (and (exists ((v_DerPreprocessor_51 (Array Int Int)) (v_DerPreprocessor_52 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135|)) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135|) 0) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135|) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_51) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135| v_DerPreprocessor_52) .cse0 v_DerPreprocessor_51) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_135| v_DerPreprocessor_52) .cse0)) (not (= .cse0 0)) (= (select .cse1 24) (select v_DerPreprocessor_52 24)))))) (= |c_aws_linked_list_is_valid_#in~list#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3)) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36| Int)) (and (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36| 0)) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36| Int)) (let ((.cse6 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|)) (.cse5 (+ 8 .cse6))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse4) .cse5) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|) (= (select (select |c_#memory_$Pointer$.base| .cse4) .cse5) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) (not (= .cse6 0)))))))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36| Int)) (and (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36| 0)) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36| Int)) (let ((.cse9 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|)) (.cse8 (+ 8 .cse9))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|) (= (select (select |c_#memory_$Pointer$.base| .cse7) .cse8) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) (not (= .cse9 0)))))))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|)) (.cse11 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|)))) (and (not (= .cse10 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|) (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|)))) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36| Int)) (and (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36| 0)) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36| Int)) (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|)) (.cse13 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|)))) (and (not (= .cse12 0)) (= (select (select |c_#memory_$Pointer$.offset| .cse12) .cse13) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_36|) (= (select (select |c_#memory_$Pointer$.base| .cse12) .cse13) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_36|))))))) (= |c_aws_linked_list_is_valid_#in~list#1.base| (select (select |c_#memory_$Pointer$.base| .cse2) .cse3)) (exists ((v_DerPreprocessor_55 (Array Int Int)) (v_aws_linked_list_front_~list.base_BEFORE_CALL_103 Int) (v_DerPreprocessor_56 (Array Int Int))) (let ((.cse15 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_103))) (let ((.cse14 (select .cse15 0))) (and (not (= .cse14 0)) (= (select |c_#memory_$Pointer$.base| .cse14) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse14 v_DerPreprocessor_55) v_aws_linked_list_front_~list.base_BEFORE_CALL_103 v_DerPreprocessor_56) .cse14 v_DerPreprocessor_55) v_aws_linked_list_front_~list.base_BEFORE_CALL_103 v_DerPreprocessor_56) .cse14)) (= (select v_DerPreprocessor_56 24) (select .cse15 24)) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_103) (not (= v_aws_linked_list_front_~list.base_BEFORE_CALL_103 .cse14)) (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_103) 0) 0))))) (exists ((v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136| Int)) (let ((.cse16 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136|))) (let ((.cse17 (select .cse16 0))) (and (= (select v_DerPreprocessor_54 24) (select .cse16 24)) (not (= |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136| .cse17)) (= (select |c_#memory_$Pointer$.base| .cse17) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse17 v_DerPreprocessor_53) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136| v_DerPreprocessor_54) .cse17 v_DerPreprocessor_53) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136| v_DerPreprocessor_54) .cse17)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136|) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_136|) 0) 0) (not (= .cse17 0)))))) (or (not (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0)) (not (= |c_aws_linked_list_is_valid_#in~list#1.base| 0))) (or (not (= .cse2 0)) (not (= .cse18 0)))))) is different from true [2022-11-19 07:20:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 24 refuted. 12 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-19 07:20:37,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:21:51,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565138418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:51,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376177496] [2022-11-19 07:21:51,233 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:21:51,233 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:21:51,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:21:51,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:21:51,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:21:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:51,662 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 07:21:51,662 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 [2022-11-19 07:21:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,130 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:21:52,130 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 [2022-11-19 07:21:52,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:21:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:21:52,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:21:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:21:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:52,897 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:21:52,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:21:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,475 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:21:53,475 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 [2022-11-19 07:21:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:21:53,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,708 INFO L217 Elim1Store]: Index analysis took 128 ms [2022-11-19 07:21:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:53,915 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:21:53,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:21:53,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:53,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:54,563 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:21:54,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:21:54,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:54,644 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 [2022-11-19 07:21:54,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:21:54,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:21:54,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:54,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:21:54,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:54,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:21:54,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:54,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:21:55,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:21:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:21:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:21:55,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:21:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:21:55,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:21:55,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:21:55,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:21:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:21:55,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:21:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:21:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:55,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:21:56,377 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-19 07:21:57,782 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-19 07:21:58,125 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-11-19 07:21:58,266 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-19 07:21:59,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:21:59,170 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:21:59,205 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:21:59,270 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:22:11,625 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 93 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:23:56,453 WARN L233 SmtUtils]: Spent 13.07s on a formula simplification. DAG size of input: 89 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:24:11,024 WARN L233 SmtUtils]: Spent 13.11s on a formula simplification. DAG size of input: 91 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:24:11,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9090#(and (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_125 Int)) (and (not (= (mod (ite (= v_aws_linked_list_front_~list.base_BEFORE_CALL_125 0) 0 1) 256) 0)) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_125) 0)) (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_125) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_125)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_125) 0)) (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_125) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_125)) 1 0) 0) 0 1)) (<= (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_125) 0)) (= (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_125) 0) v_aws_linked_list_front_~list.base_BEFORE_CALL_125)) 1 0) 0) 0 1) 1) (<= 0 v_aws_linked_list_front_~list.base_BEFORE_CALL_125))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 16)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24)) 0))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:24:11,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:24:11,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:24:11,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 40, 21] total 77 [2022-11-19 07:24:11,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753966418] [2022-11-19 07:24:11,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:11,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-19 07:24:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-19 07:24:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=11073, Unknown=337, NotChecked=216, Total=12210 [2022-11-19 07:24:11,033 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand has 77 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 62 states have internal predecessors, (117), 28 states have call successors, (43), 13 states have call predecessors, (43), 21 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-19 07:24:53,639 WARN L233 SmtUtils]: Spent 19.04s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:25:16,046 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 288 DAG size of output: 273 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:25:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:34,828 INFO L93 Difference]: Finished difference Result 319 states and 398 transitions. [2022-11-19 07:25:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 07:25:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 62 states have internal predecessors, (117), 28 states have call successors, (43), 13 states have call predecessors, (43), 21 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) Word has length 78 [2022-11-19 07:25:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:34,833 INFO L225 Difference]: With dead ends: 319 [2022-11-19 07:25:34,833 INFO L226 Difference]: Without dead ends: 245 [2022-11-19 07:25:34,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 141 SyntacticMatches, 10 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6565 ImplicationChecksByTransitivity, 393.7s TimeCoverageRelationStatistics Valid=824, Invalid=16858, Unknown=412, NotChecked=266, Total=18360 [2022-11-19 07:25:34,839 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 140 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1651 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:34,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 2274 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1851 Invalid, 0 Unknown, 1651 Unchecked, 15.7s Time] [2022-11-19 07:25:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-19 07:25:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2022-11-19 07:25:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 131 states have internal predecessors, (144), 52 states have call successors, (52), 32 states have call predecessors, (52), 33 states have return successors, (57), 49 states have call predecessors, (57), 51 states have call successors, (57) [2022-11-19 07:25:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 253 transitions. [2022-11-19 07:25:34,948 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 253 transitions. Word has length 78 [2022-11-19 07:25:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:34,948 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 253 transitions. [2022-11-19 07:25:34,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 62 states have internal predecessors, (117), 28 states have call successors, (43), 13 states have call predecessors, (43), 21 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-19 07:25:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 253 transitions. [2022-11-19 07:25:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:25:34,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:34,951 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:34,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:25:35,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -537239542, now seen corresponding path program 1 times [2022-11-19 07:25:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901552002] [2022-11-19 07:25:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:25:37,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901552002] [2022-11-19 07:25:37,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901552002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582254956] [2022-11-19 07:25:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:37,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:37,225 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:37,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bcc9eec-3747-40f2-a1d8-4c5f65974c81/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:25:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-19 07:25:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:38,264 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:25:38,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:25:38,452 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:25:38,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 07:25:41,360 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_49| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_49| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_49|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_49|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_49| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_49| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_49|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_49|) 0)))) is different from true [2022-11-19 07:25:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 2 not checked. [2022-11-19 07:25:47,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:25:53,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582254956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820157812] [2022-11-19 07:25:53,213 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-19 07:25:53,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:53,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:53,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:53,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:53,695 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 07:25:53,695 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 [2022-11-19 07:25:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,163 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:25:54,164 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 [2022-11-19 07:25:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:25:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 07:25:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 07:25:54,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:25:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,207 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:25:55,207 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 [2022-11-19 07:25:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:55,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:55,494 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:25:55,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 07:25:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,152 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:25:56,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 07:25:56,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,218 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 [2022-11-19 07:25:56,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,288 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 [2022-11-19 07:25:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,410 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 [2022-11-19 07:25:56,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:56,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:25:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:25:56,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:25:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:25:56,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:25:56,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:56,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:25:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 07:25:57,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:25:57,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:57,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:57,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:25:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:25:57,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 07:25:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:57,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:25:58,012 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-19 07:25:59,318 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-19 07:25:59,613 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-11-19 07:25:59,724 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-19 07:26:00,651 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:26:00,658 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 07:26:00,681 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:26:00,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:26:07,855 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 93 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:13,831 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 89 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)