./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF --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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:26:52,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:26:52,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:26:52,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:26:52,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:26:52,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:26:52,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:26:52,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:26:52,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:26:52,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:26:52,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:26:52,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:26:52,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:26:52,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:26:52,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:26:52,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:26:52,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:26:52,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:26:52,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:26:52,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:26:52,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:26:52,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:26:52,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:26:52,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:26:52,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:26:52,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:26:52,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:26:52,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:26:52,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:26:52,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:26:52,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:26:52,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:26:52,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:26:52,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:26:52,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:26:52,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:26:52,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:26:52,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:26:52,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:26:52,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:26:52,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:26:52,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:26:52,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:26:52,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:26:52,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:26:52,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:26:52,538 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:26:52,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:26:52,539 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:26:52,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:26:52,539 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:26:52,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:26:52,540 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:26:52,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:26:52,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:26:52,541 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:26:52,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:26:52,541 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:26:52,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:26:52,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:26:52,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:26:52,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:26:52,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:26:52,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:26:52,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:26:52,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:26:52,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:26:52,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:26:52,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:26:52,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:26:52,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:26:52,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:26:52,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:26:52,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:26:52,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:26:52,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:26:52,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:26:52,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:26:52,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:26:52,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-12 22:26:52,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:26:52,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:26:52,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:26:52,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:26:52,891 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:26:52,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-12 22:26:52,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/4478cb00b/06b9a7101c284ff5be63a7a02b11104e/FLAGc2f6916ce [2021-11-12 22:26:53,688 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:26:53,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-12 22:26:53,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/4478cb00b/06b9a7101c284ff5be63a7a02b11104e/FLAGc2f6916ce [2021-11-12 22:26:53,797 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/4478cb00b/06b9a7101c284ff5be63a7a02b11104e [2021-11-12 22:26:53,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:26:53,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:26:53,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:26:53,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:26:53,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:26:53,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:53" (1/1) ... [2021-11-12 22:26:53,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb5439b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:53, skipping insertion in model container [2021-11-12 22:26:53,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:53" (1/1) ... [2021-11-12 22:26:53,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:26:53,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:26:54,131 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-12 22:26:54,137 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-12 22:26:54,158 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:26:54,163 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:26:54,922 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,923 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,924 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,925 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,926 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,941 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,942 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,960 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,962 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,962 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:54,963 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:26:55,302 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:26:55,303 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:26:55,304 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:26:55,305 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:26:55,307 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:26:55,307 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:26:55,308 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:26:55,309 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:26:55,309 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:26:55,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:26:55,441 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:26:55,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:26:55,484 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:26:55,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cd2f88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:55, skipping insertion in model container [2021-11-12 22:26:55,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:26:55,485 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:26:55,488 INFO L158 Benchmark]: Toolchain (without parser) took 1684.04ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 71.6MB in the beginning and 95.8MB in the end (delta: -24.2MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2021-11-12 22:26:55,488 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:26:55,489 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1682.13ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 71.6MB in the beginning and 95.8MB in the end (delta: -24.2MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2021-11-12 22:26:55,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1682.13ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 71.6MB in the beginning and 95.8MB in the end (delta: -24.2MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF --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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:26:57,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:26:57,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:26:57,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:26:57,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:26:57,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:26:57,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:26:57,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:26:57,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:26:57,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:26:57,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:26:57,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:26:57,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:26:57,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:26:57,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:26:57,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:26:57,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:26:57,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:26:57,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:26:57,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:26:57,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:26:57,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:26:57,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:26:57,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:26:57,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:26:57,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:26:57,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:26:57,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:26:57,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:26:57,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:26:57,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:26:57,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:26:57,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:26:57,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:26:57,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:26:57,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:26:58,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:26:58,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:26:58,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:26:58,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:26:58,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:26:58,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:26:58,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:26:58,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:26:58,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:26:58,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:26:58,046 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:26:58,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:26:58,046 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:26:58,047 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:26:58,047 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:26:58,047 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:26:58,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:26:58,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:26:58,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:26:58,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:26:58,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:26:58,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:26:58,049 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:26:58,050 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:26:58,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:26:58,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:26:58,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:26:58,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:26:58,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:26:58,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:26:58,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:26:58,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:26:58,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:26:58,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:26:58,052 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:26:58,052 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:58,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:26:58,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:26:58,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:26:58,053 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-12 22:26:58,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:26:58,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:26:58,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:26:58,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:26:58,478 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:26:58,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-12 22:26:58,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/1228e4543/740c766540cf4d99bef6866921dcac2c/FLAG79f0e939b [2021-11-12 22:26:59,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:26:59,491 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-12 22:26:59,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/1228e4543/740c766540cf4d99bef6866921dcac2c/FLAG79f0e939b [2021-11-12 22:26:59,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/data/1228e4543/740c766540cf4d99bef6866921dcac2c [2021-11-12 22:26:59,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:26:59,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:27:00,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:27:00,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:27:00,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:27:00,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:59" (1/1) ... [2021-11-12 22:27:00,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a01967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:00, skipping insertion in model container [2021-11-12 22:27:00,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:59" (1/1) ... [2021-11-12 22:27:00,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:27:00,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:27:00,436 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-12 22:27:00,442 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-12 22:27:00,459 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:27:00,465 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:27:01,170 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,171 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,171 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,172 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,173 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,189 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,190 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,192 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,192 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,194 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,196 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,196 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,197 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,560 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:27:01,563 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:27:01,564 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:27:01,566 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:27:01,567 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:27:01,569 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:27:01,569 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:27:01,570 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:27:01,587 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:27:01,588 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:27:01,734 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:27:01,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:01,777 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:27:01,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:27:01,805 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-12 22:27:01,806 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-12 22:27:01,807 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:27:01,808 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:27:01,866 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,866 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,867 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,867 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,868 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,876 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,877 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,878 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,878 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,879 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,879 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:01,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:27:01,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:27:01,915 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:27:01,916 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:27:01,917 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:27:01,917 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:27:01,918 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:27:01,918 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:27:01,919 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:27:01,919 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:27:01,941 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:27:01,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:01,981 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:27:02,020 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-12 22:27:02,020 WARN L228 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_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-12 22:27:02,022 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:27:02,022 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:27:02,072 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,074 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,074 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,083 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,084 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,084 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,085 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,085 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,086 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,087 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,087 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:27:02,126 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:27:02,127 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:27:02,127 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:27:02,128 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:27:02,129 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:27:02,130 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:27:02,130 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:27:02,130 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:27:02,131 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:27:02,131 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:27:02,157 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:27:02,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:27:02,533 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:27:02,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02 WrapperNode [2021-11-12 22:27:02,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:27:02,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:27:02,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:27:02,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:27:02,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:27:02,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:27:02,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:27:02,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:27:02,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:27:02,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:27:02,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:27:02,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:27:02,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (1/1) ... [2021-11-12 22:27:02,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:27:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:02,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:27:02,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:27:02,868 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-12 22:27:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-12 22:27:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-12 22:27:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-12 22:27:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:27:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:27:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:27:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:27:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:27:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 22:27:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:27:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-12 22:27:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-12 22:27:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:27:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:27:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:27:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:27:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-12 22:27:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-12 22:27:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:27:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:27:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:27:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:27:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:27:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:27:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:27:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 22:27:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 22:27:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-12 22:27:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-12 22:27:03,757 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:27:03,757 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-12 22:27:03,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:27:03 BoogieIcfgContainer [2021-11-12 22:27:03,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:27:03,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:27:03,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:27:03,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:27:03,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:26:59" (1/3) ... [2021-11-12 22:27:03,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7097747b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:27:03, skipping insertion in model container [2021-11-12 22:27:03,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:27:02" (2/3) ... [2021-11-12 22:27:03,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7097747b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:27:03, skipping insertion in model container [2021-11-12 22:27:03,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:27:03" (3/3) ... [2021-11-12 22:27:03,780 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-11-12 22:27:03,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:27:03,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:27:03,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:27:03,861 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:27:03,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:27:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-12 22:27:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:27:03,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:03,893 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:03,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-11-12 22:27:03,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:03,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405504870] [2021-11-12 22:27:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:03,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:03,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:03,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:27:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:27:04,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:27:04,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-12 22:27:04,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:04,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405504870] [2021-11-12 22:27:04,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405504870] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:04,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:04,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 22:27:04,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135080756] [2021-11-12 22:27:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:04,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:27:04,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:04,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:27:04,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:27:04,893 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:27:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:04,993 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-11-12 22:27:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:27:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-11-12 22:27:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:05,007 INFO L225 Difference]: With dead ends: 274 [2021-11-12 22:27:05,008 INFO L226 Difference]: Without dead ends: 140 [2021-11-12 22:27:05,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:27:05,017 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.80ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:05,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 11.80ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 19.34ms Time] [2021-11-12 22:27:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-12 22:27:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-11-12 22:27:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-12 22:27:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-11-12 22:27:05,079 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-11-12 22:27:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-11-12 22:27:05,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:27:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-11-12 22:27:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:27:05,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:05,085 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:05,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:27:05,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:05,302 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-11-12 22:27:05,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:05,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659584357] [2021-11-12 22:27:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:05,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:05,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:05,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:27:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:05,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:05,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:27:05,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-12 22:27:06,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:06,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659584357] [2021-11-12 22:27:06,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659584357] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:06,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:06,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 22:27:06,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508862405] [2021-11-12 22:27:06,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:06,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:27:06,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:27:06,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:27:06,041 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:27:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:06,154 INFO L93 Difference]: Finished difference Result 255 states and 350 transitions. [2021-11-12 22:27:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:27:06,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-11-12 22:27:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:06,160 INFO L225 Difference]: With dead ends: 255 [2021-11-12 22:27:06,160 INFO L226 Difference]: Without dead ends: 141 [2021-11-12 22:27:06,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:06,167 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 9 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.37ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:06,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 688 Invalid, 27 Unknown, 0 Unchecked, 9.37ms Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 32.04ms Time] [2021-11-12 22:27:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-12 22:27:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2021-11-12 22:27:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-12 22:27:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-11-12 22:27:06,199 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-11-12 22:27:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:06,202 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-11-12 22:27:06,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:27:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-11-12 22:27:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:27:06,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:06,211 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:06,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:06,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:06,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-11-12 22:27:06,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:06,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810698110] [2021-11-12 22:27:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:06,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:06,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:06,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:06,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:27:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:27:06,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-12 22:27:06,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-12 22:27:07,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:07,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810698110] [2021-11-12 22:27:07,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810698110] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:07,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:07,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-12 22:27:07,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185237395] [2021-11-12 22:27:07,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:07,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:27:07,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:27:07,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:27:07,295 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:27:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:07,440 INFO L93 Difference]: Finished difference Result 256 states and 345 transitions. [2021-11-12 22:27:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:27:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 116 [2021-11-12 22:27:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:07,447 INFO L225 Difference]: With dead ends: 256 [2021-11-12 22:27:07,447 INFO L226 Difference]: Without dead ends: 139 [2021-11-12 22:27:07,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:07,452 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:07,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 807 Invalid, 77 Unknown, 0 Unchecked, 12.40ms Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 101.71ms Time] [2021-11-12 22:27:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-12 22:27:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-12 22:27:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 92 states have internal predecessors, (111), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2021-11-12 22:27:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 188 transitions. [2021-11-12 22:27:07,479 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 188 transitions. Word has length 116 [2021-11-12 22:27:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:07,480 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 188 transitions. [2021-11-12 22:27:07,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:27:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 188 transitions. [2021-11-12 22:27:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:27:07,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:07,484 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:07,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:07,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:07,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1486715478, now seen corresponding path program 1 times [2021-11-12 22:27:07,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:07,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160206783] [2021-11-12 22:27:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:07,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:07,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:07,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:07,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:27:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:08,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:27:08,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:27:08,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-12 22:27:08,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:08,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160206783] [2021-11-12 22:27:08,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160206783] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:08,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:08,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-12 22:27:08,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983793521] [2021-11-12 22:27:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:08,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:27:08,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:27:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:08,861 INFO L87 Difference]: Start difference. First operand 139 states and 188 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:27:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:09,174 INFO L93 Difference]: Finished difference Result 261 states and 356 transitions. [2021-11-12 22:27:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:27:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 118 [2021-11-12 22:27:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:09,177 INFO L225 Difference]: With dead ends: 261 [2021-11-12 22:27:09,178 INFO L226 Difference]: Without dead ends: 142 [2021-11-12 22:27:09,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:27:09,179 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 69 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 214.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.59ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:09,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 852 Invalid, 149 Unknown, 0 Unchecked, 5.59ms Time], IncrementalHoareTripleChecker [44 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 247.62ms Time] [2021-11-12 22:27:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-12 22:27:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-12 22:27:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 95 states have internal predecessors, (113), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-12 22:27:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2021-11-12 22:27:09,196 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 118 [2021-11-12 22:27:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:09,196 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2021-11-12 22:27:09,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:27:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2021-11-12 22:27:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:27:09,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:09,199 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:09,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 22:27:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:09,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1084644541, now seen corresponding path program 1 times [2021-11-12 22:27:09,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:09,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794148420] [2021-11-12 22:27:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:09,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:09,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:09,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:09,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:27:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:27:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:27:10,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-12 22:27:10,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:10,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794148420] [2021-11-12 22:27:10,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794148420] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:10,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:10,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-12 22:27:10,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934777904] [2021-11-12 22:27:10,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:10,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:27:10,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:27:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:27:10,501 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:27:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:10,917 INFO L93 Difference]: Finished difference Result 276 states and 381 transitions. [2021-11-12 22:27:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:27:10,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2021-11-12 22:27:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:10,922 INFO L225 Difference]: With dead ends: 276 [2021-11-12 22:27:10,922 INFO L226 Difference]: Without dead ends: 154 [2021-11-12 22:27:10,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:27:10,924 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 97 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.58ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:10,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1002 Invalid, 209 Unknown, 0 Unchecked, 5.58ms Time], IncrementalHoareTripleChecker [53 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 312.31ms Time] [2021-11-12 22:27:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-12 22:27:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2021-11-12 22:27:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 97 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-12 22:27:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 195 transitions. [2021-11-12 22:27:10,951 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 195 transitions. Word has length 120 [2021-11-12 22:27:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 195 transitions. [2021-11-12 22:27:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:27:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 195 transitions. [2021-11-12 22:27:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:27:10,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:10,954 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:10,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:11,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:11,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1096826829, now seen corresponding path program 1 times [2021-11-12 22:27:11,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:11,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980660038] [2021-11-12 22:27:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:11,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:11,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:11,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:11,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:27:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:27:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:27:11,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-12 22:27:12,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:12,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980660038] [2021-11-12 22:27:12,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980660038] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:12,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:12,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3] total 8 [2021-11-12 22:27:12,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856811956] [2021-11-12 22:27:12,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:12,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:27:12,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:27:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:12,054 INFO L87 Difference]: Start difference. First operand 144 states and 195 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:27:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:12,388 INFO L93 Difference]: Finished difference Result 277 states and 385 transitions. [2021-11-12 22:27:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:27:12,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2021-11-12 22:27:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:12,392 INFO L225 Difference]: With dead ends: 277 [2021-11-12 22:27:12,392 INFO L226 Difference]: Without dead ends: 153 [2021-11-12 22:27:12,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:27:12,393 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 78 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:12,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 849 Invalid, 173 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [48 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 266.21ms Time] [2021-11-12 22:27:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-12 22:27:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2021-11-12 22:27:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.231578947368421) internal successors, (117), 98 states have internal predecessors, (117), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-12 22:27:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 196 transitions. [2021-11-12 22:27:12,410 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 196 transitions. Word has length 121 [2021-11-12 22:27:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:12,410 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 196 transitions. [2021-11-12 22:27:12,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:27:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 196 transitions. [2021-11-12 22:27:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:27:12,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:12,413 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:12,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:12,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:12,628 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 546558767, now seen corresponding path program 1 times [2021-11-12 22:27:12,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:12,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965725052] [2021-11-12 22:27:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:12,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:12,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:12,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:12,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:27:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:27:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-12 22:27:13,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-12 22:27:13,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:13,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965725052] [2021-11-12 22:27:13,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965725052] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:13,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:13,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:27:13,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635717659] [2021-11-12 22:27:13,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:27:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:27:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:27:13,471 INFO L87 Difference]: Start difference. First operand 145 states and 196 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:27:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:13,617 INFO L93 Difference]: Finished difference Result 276 states and 376 transitions. [2021-11-12 22:27:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:27:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 129 [2021-11-12 22:27:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:13,621 INFO L225 Difference]: With dead ends: 276 [2021-11-12 22:27:13,621 INFO L226 Difference]: Without dead ends: 151 [2021-11-12 22:27:13,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:27:13,623 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 4 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:13,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 993 Invalid, 97 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 104.08ms Time] [2021-11-12 22:27:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-12 22:27:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2021-11-12 22:27:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 99 states have internal predecessors, (118), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-12 22:27:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 197 transitions. [2021-11-12 22:27:13,639 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 197 transitions. Word has length 129 [2021-11-12 22:27:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 197 transitions. [2021-11-12 22:27:13,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:27:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 197 transitions. [2021-11-12 22:27:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:27:13,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:13,642 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:13,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:13,860 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1662855644, now seen corresponding path program 1 times [2021-11-12 22:27:13,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:13,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538370244] [2021-11-12 22:27:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:13,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:13,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:13,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:27:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:27:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:27:15,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-12 22:27:16,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:16,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538370244] [2021-11-12 22:27:16,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538370244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:16,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368383964] [2021-11-12 22:27:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:16,012 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:16,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:16,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:16,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:27:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-12 22:27:16,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-12 22:27:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368383964] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:17,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:27:17,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-12 22:27:17,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954731746] [2021-11-12 22:27:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:17,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:27:17,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:27:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:27:17,013 INFO L87 Difference]: Start difference. First operand 146 states and 197 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:27:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:17,231 INFO L93 Difference]: Finished difference Result 281 states and 384 transitions. [2021-11-12 22:27:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:27:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 131 [2021-11-12 22:27:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:17,234 INFO L225 Difference]: With dead ends: 281 [2021-11-12 22:27:17,234 INFO L226 Difference]: Without dead ends: 155 [2021-11-12 22:27:17,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 498 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:27:17,236 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 8 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:17,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1167 Invalid, 122 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 115.00ms Time] [2021-11-12 22:27:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-12 22:27:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2021-11-12 22:27:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 100 states have internal predecessors, (119), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-12 22:27:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 198 transitions. [2021-11-12 22:27:17,250 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 198 transitions. Word has length 131 [2021-11-12 22:27:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:17,250 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 198 transitions. [2021-11-12 22:27:17,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:27:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 198 transitions. [2021-11-12 22:27:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:27:17,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:17,253 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:17,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:17,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-12 22:27:17,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:17,670 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash 369986644, now seen corresponding path program 1 times [2021-11-12 22:27:17,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:17,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056500032] [2021-11-12 22:27:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:17,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:17,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:17,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:17,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:27:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:27:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:20,495 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_14| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_14|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_14| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_14|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_14|)))) is different from true [2021-11-12 22:27:22,775 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_15| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_15|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_15|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_15| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_15|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:27:24,975 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_16| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_16|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_16| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_16|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_16|)))) is different from true [2021-11-12 22:27:33,125 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:27:41,439 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:27:49,649 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:27:58,021 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:06,233 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2021-11-12 22:28:06,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:11,909 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:28:11,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:28:11,922 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:28:11,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:28:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-12 22:28:11,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:11,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056500032] [2021-11-12 22:28:11,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056500032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:11,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1511160872] [2021-11-12 22:28:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:11,985 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:11,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:11,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:12,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:28:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:12,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:28:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:28:12,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-12 22:28:12,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1511160872] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:28:12,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:28:12,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18, 14, 6] total 32 [2021-11-12 22:28:12,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616320345] [2021-11-12 22:28:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:12,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:28:12,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:28:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=726, Unknown=4, NotChecked=168, Total=992 [2021-11-12 22:28:12,960 INFO L87 Difference]: Start difference. First operand 147 states and 198 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:28:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:13,145 INFO L93 Difference]: Finished difference Result 273 states and 367 transitions. [2021-11-12 22:28:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 132 [2021-11-12 22:28:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:13,148 INFO L225 Difference]: With dead ends: 273 [2021-11-12 22:28:13,148 INFO L226 Difference]: Without dead ends: 149 [2021-11-12 22:28:13,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=101, Invalid=777, Unknown=4, NotChecked=174, Total=1056 [2021-11-12 22:28:13,150 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:13,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 807 Invalid, 77 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 99.52ms Time] [2021-11-12 22:28:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-12 22:28:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-12 22:28:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 102 states have internal predecessors, (120), 37 states have call successors, (37), 10 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:28:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 202 transitions. [2021-11-12 22:28:13,162 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 202 transitions. Word has length 132 [2021-11-12 22:28:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:13,163 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 202 transitions. [2021-11-12 22:28:13,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:28:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 202 transitions. [2021-11-12 22:28:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:28:13,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:13,166 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:13,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:13,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:13,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:13,583 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash 665791126, now seen corresponding path program 1 times [2021-11-12 22:28:13,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:13,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744262066] [2021-11-12 22:28:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:13,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:13,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:13,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:13,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:28:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:28:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:16,310 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_20| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_20|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_20| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_20|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_20|)))) is different from true [2021-11-12 22:28:18,498 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_21| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_21|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_21| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_21|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_21|)))) is different from true [2021-11-12 22:28:20,632 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_22| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_22|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_22| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_22|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_22|)))) is different from true [2021-11-12 22:28:28,753 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:37,043 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:45,294 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:28:53,685 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:01,946 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2021-11-12 22:29:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:07,219 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:29:07,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:29:07,229 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:29:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:29:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-12 22:29:07,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:07,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744262066] [2021-11-12 22:29:07,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744262066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:07,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2602825] [2021-11-12 22:29:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:07,276 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:07,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:07,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:07,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:29:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:07,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:29:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:29:08,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-12 22:29:08,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2602825] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:08,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:08,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18, 14, 8] total 37 [2021-11-12 22:29:08,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837658140] [2021-11-12 22:29:08,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:08,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:29:08,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:29:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1017, Unknown=4, NotChecked=198, Total=1332 [2021-11-12 22:29:08,786 INFO L87 Difference]: Start difference. First operand 149 states and 202 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-12 22:29:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:09,483 INFO L93 Difference]: Finished difference Result 278 states and 374 transitions. [2021-11-12 22:29:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:29:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2021-11-12 22:29:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:09,489 INFO L225 Difference]: With dead ends: 278 [2021-11-12 22:29:09,490 INFO L226 Difference]: Without dead ends: 149 [2021-11-12 22:29:09,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 496 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=137, Invalid=1277, Unknown=4, NotChecked=222, Total=1640 [2021-11-12 22:29:09,492 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 85 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 255.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:09,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 982 Invalid, 174 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [58 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 255.36ms Time] [2021-11-12 22:29:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-12 22:29:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-12 22:29:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 102 states have internal predecessors, (119), 37 states have call successors, (37), 10 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-12 22:29:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 201 transitions. [2021-11-12 22:29:09,504 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 201 transitions. Word has length 134 [2021-11-12 22:29:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:09,505 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 201 transitions. [2021-11-12 22:29:09,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-12 22:29:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 201 transitions. [2021-11-12 22:29:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:29:09,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:09,507 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:09,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:09,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:09,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:09,910 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1372436029, now seen corresponding path program 1 times [2021-11-12 22:29:09,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:09,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912151695] [2021-11-12 22:29:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:09,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:09,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:09,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:09,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:29:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:29:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:12,645 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_34| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_34|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_34| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_34|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_34|)))) is different from true [2021-11-12 22:29:14,849 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_35| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_35|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_35| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_35|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:29:16,991 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_36| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_36|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_36|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_36| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_36|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:29:25,122 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:33,422 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:41,604 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:49,946 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:58,209 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:29:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2021-11-12 22:29:58,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:03,554 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:30:03,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:30:03,563 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:30:03,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:30:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-12 22:30:03,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:03,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912151695] [2021-11-12 22:30:03,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912151695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:03,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2083542637] [2021-11-12 22:30:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:03,610 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:03,613 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:03,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:30:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:30:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:30:04,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-12 22:30:05,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2083542637] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:30:05,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:30:05,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18, 14, 9] total 39 [2021-11-12 22:30:05,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325876566] [2021-11-12 22:30:05,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:05,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:30:05,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:05,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:30:05,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1147, Unknown=4, NotChecked=210, Total=1482 [2021-11-12 22:30:05,285 INFO L87 Difference]: Start difference. First operand 149 states and 201 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-12 22:30:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:06,017 INFO L93 Difference]: Finished difference Result 280 states and 378 transitions. [2021-11-12 22:30:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:30:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 136 [2021-11-12 22:30:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:06,020 INFO L225 Difference]: With dead ends: 280 [2021-11-12 22:30:06,020 INFO L226 Difference]: Without dead ends: 150 [2021-11-12 22:30:06,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 503 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=157, Invalid=1491, Unknown=4, NotChecked=240, Total=1892 [2021-11-12 22:30:06,023 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 106 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.27ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:06,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1124 Invalid, 222 Unknown, 0 Unchecked, 4.27ms Time], IncrementalHoareTripleChecker [67 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 325.46ms Time] [2021-11-12 22:30:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-12 22:30:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2021-11-12 22:30:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 98 states have internal predecessors, (115), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (43), 36 states have call predecessors, (43), 36 states have call successors, (43) [2021-11-12 22:30:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 195 transitions. [2021-11-12 22:30:06,035 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 195 transitions. Word has length 136 [2021-11-12 22:30:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:06,036 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 195 transitions. [2021-11-12 22:30:06,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-12 22:30:06,036 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 195 transitions. [2021-11-12 22:30:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:30:06,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:06,038 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:06,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-12 22:30:06,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:06,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:06,441 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash 180165591, now seen corresponding path program 1 times [2021-11-12 22:30:06,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:06,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563155258] [2021-11-12 22:30:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:06,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:06,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:06,443 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:06,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:30:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:30:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:09,122 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_48|)))) is different from true [2021-11-12 22:30:11,298 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_49|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:30:13,447 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_50|) (_ bv0 64)))))) is different from true [2021-11-12 22:30:21,568 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:30:29,835 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:30:37,984 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:30:46,282 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:30:54,527 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:30:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2021-11-12 22:30:54,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:59,847 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:30:59,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:30:59,856 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:30:59,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:30:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:30:59,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563155258] [2021-11-12 22:30:59,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563155258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943475283] [2021-11-12 22:30:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:59,902 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:59,903 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:59,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:31:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:00,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:31:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:31:00,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-12 22:31:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943475283] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:31:00,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:31:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18, 14, 7] total 33 [2021-11-12 22:31:00,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637316759] [2021-11-12 22:31:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:00,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:31:00,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:31:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=782, Unknown=4, NotChecked=174, Total=1056 [2021-11-12 22:31:00,936 INFO L87 Difference]: Start difference. First operand 145 states and 195 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:31:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:01,162 INFO L93 Difference]: Finished difference Result 270 states and 363 transitions. [2021-11-12 22:31:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:31:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 145 [2021-11-12 22:31:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:01,168 INFO L225 Difference]: With dead ends: 270 [2021-11-12 22:31:01,168 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 22:31:01,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 542 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=107, Invalid=893, Unknown=4, NotChecked=186, Total=1190 [2021-11-12 22:31:01,170 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:01,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 982 Invalid, 96 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 93.22ms Time] [2021-11-12 22:31:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 22:31:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2021-11-12 22:31:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 99 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (43), 36 states have call predecessors, (43), 36 states have call successors, (43) [2021-11-12 22:31:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 196 transitions. [2021-11-12 22:31:01,182 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 196 transitions. Word has length 145 [2021-11-12 22:31:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:01,182 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 196 transitions. [2021-11-12 22:31:01,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:31:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 196 transitions. [2021-11-12 22:31:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:31:01,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:01,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:01,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:01,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:01,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:01,611 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash 92860100, now seen corresponding path program 2 times [2021-11-12 22:31:01,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730801895] [2021-11-12 22:31:01,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:01,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:01,613 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:01,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:31:01,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:01,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:01,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:31:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:04,510 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_54| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_54|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_54|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_54| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_54|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:31:06,657 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_55| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_55|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_55|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_55| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_55|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:31:08,818 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_56| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_56|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_56| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_56|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_56|)))) is different from true [2021-11-12 22:31:16,969 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:31:25,237 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:31:33,435 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:31:41,734 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:31:49,984 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:31:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 14 not checked. [2021-11-12 22:31:50,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:55,063 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:31:55,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:31:55,072 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:31:55,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:31:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-12 22:31:55,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:55,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730801895] [2021-11-12 22:31:55,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730801895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:55,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830810108] [2021-11-12 22:31:55,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:55,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:55,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:55,120 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:55,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:31:55,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:55,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:31:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-12 22:31:56,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-12 22:31:56,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1830810108] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:31:56,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:31:56,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18, 14, 8] total 34 [2021-11-12 22:31:56,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564934386] [2021-11-12 22:31:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:56,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:31:56,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:31:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=840, Unknown=4, NotChecked=180, Total=1122 [2021-11-12 22:31:56,470 INFO L87 Difference]: Start difference. First operand 146 states and 196 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:31:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:56,770 INFO L93 Difference]: Finished difference Result 271 states and 363 transitions. [2021-11-12 22:31:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:31:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 147 [2021-11-12 22:31:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:56,773 INFO L225 Difference]: With dead ends: 271 [2021-11-12 22:31:56,773 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 22:31:56,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 550 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=115, Invalid=1015, Unknown=4, NotChecked=198, Total=1332 [2021-11-12 22:31:56,775 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 8 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:56,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1136 Invalid, 116 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 94.50ms Time] [2021-11-12 22:31:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 22:31:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2021-11-12 22:31:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (39), 36 states have call predecessors, (39), 36 states have call successors, (39) [2021-11-12 22:31:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2021-11-12 22:31:56,785 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 147 [2021-11-12 22:31:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:56,786 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2021-11-12 22:31:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:31:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2021-11-12 22:31:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:31:56,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:56,788 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:56,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:57,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:57,191 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash 765829908, now seen corresponding path program 2 times [2021-11-12 22:31:57,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:57,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832209803] [2021-11-12 22:31:57,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:31:57,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:57,193 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:57,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:31:57,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:31:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:31:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:59,867 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_60| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_60|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_60| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_60|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_60|)))) is different from true [2021-11-12 22:32:02,028 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_61| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_61|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_61|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_61| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_61|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:32:04,165 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_62| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_62|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_62| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_62|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_62|)))) is different from true [2021-11-12 22:32:12,285 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:20,548 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:28,707 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:37,013 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:45,274 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:32:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 14 not checked. [2021-11-12 22:32:45,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:50,804 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:32:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:32:50,814 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:32:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:32:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-12 22:32:50,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:50,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832209803] [2021-11-12 22:32:50,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832209803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:50,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [677391102] [2021-11-12 22:32:50,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:32:50,870 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:50,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:50,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:32:51,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:32:51,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:32:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:32:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:51,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-12 22:33:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-12 22:33:00,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:02,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2021-11-12 22:33:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-12 22:33:03,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [677391102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:03,355 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:33:03,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [18, 14] total 48 [2021-11-12 22:33:03,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347818179] [2021-11-12 22:33:03,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:03,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:33:03,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:03,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:33:03,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1833, Unknown=5, NotChecked=264, Total=2256 [2021-11-12 22:33:03,358 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 11 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2021-11-12 22:33:05,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:05,440 INFO L93 Difference]: Finished difference Result 369 states and 496 transitions. [2021-11-12 22:33:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:33:05,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 11 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 148 [2021-11-12 22:33:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:05,444 INFO L225 Difference]: With dead ends: 369 [2021-11-12 22:33:05,444 INFO L226 Difference]: Without dead ends: 253 [2021-11-12 22:33:05,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 520 SyntacticMatches, 23 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=179, Invalid=2084, Unknown=5, NotChecked=282, Total=2550 [2021-11-12 22:33:05,447 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 127 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1253.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.33ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1461.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:05,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 2647 Invalid, 610 Unknown, 0 Unchecked, 14.33ms Time], IncrementalHoareTripleChecker [29 Valid, 386 Invalid, 0 Unknown, 195 Unchecked, 1461.03ms Time] [2021-11-12 22:33:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-12 22:33:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 214. [2021-11-12 22:33:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 146 states have (on average 1.2123287671232876) internal successors, (177), 151 states have internal predecessors, (177), 50 states have call successors, (50), 14 states have call predecessors, (50), 17 states have return successors, (57), 48 states have call predecessors, (57), 49 states have call successors, (57) [2021-11-12 22:33:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 284 transitions. [2021-11-12 22:33:05,480 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 284 transitions. Word has length 148 [2021-11-12 22:33:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:05,480 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 284 transitions. [2021-11-12 22:33:05,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 11 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2021-11-12 22:33:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 284 transitions. [2021-11-12 22:33:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:33:05,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:05,486 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:33:05,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:05,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 22:33:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:05,891 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1710038106, now seen corresponding path program 1 times [2021-11-12 22:33:05,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:05,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038928113] [2021-11-12 22:33:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:05,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:05,893 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:05,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:33:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:33:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:08,757 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_74| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_74|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_74| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_74|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_74|)))) is different from true [2021-11-12 22:33:10,941 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_75| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_75|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_75|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_75| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_75|) (_ bv0 64)) (_ bv16 64))))) is different from true [2021-11-12 22:33:13,117 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_76| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_76|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_76| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_76|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_front_~list#1.base_BEFORE_CALL_76|)))) is different from true [2021-11-12 22:33:21,277 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:29,613 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:37,773 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:46,105 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:54,370 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:33:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 14 not checked. [2021-11-12 22:33:54,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:59,755 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 22:33:59,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 22:33:59,764 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 22:33:59,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 22:33:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-12 22:33:59,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:59,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038928113] [2021-11-12 22:33:59,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038928113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:33:59,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676632652] [2021-11-12 22:33:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:59,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:59,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:33:59,815 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:33:59,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_747e7e9b-fa69-49f0-8a6f-5b61f90f9981/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:34:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:34:00,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:09,055 WARN L227 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:34:09,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:34:09,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 76 [2021-11-12 22:34:09,103 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-12 22:34:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 90