./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:50,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:50,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:50,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:50,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:50,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:50,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:50,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:50,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:50,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:50,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:50,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:50,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:50,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:50,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:50,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:50,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:50,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:50,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:50,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:50,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:50,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:50,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:50,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:50,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:50,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:50,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:50,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:50,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:50,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:50,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:50,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:50,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:50,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:50,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:50,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:50,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:50,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:50,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:50,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:50,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:50,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:28:50,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:50,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:50,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:50,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:50,504 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:50,505 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:50,505 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:50,505 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:28:50,505 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:50,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:50,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:28:50,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:28:50,506 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:50,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:28:50,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:28:50,507 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:28:50,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:50,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:28:50,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:50,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:50,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:50,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:50,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:50,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:50,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:50,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:50,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:50,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:50,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:50,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:50,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:50,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:50,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:28:50,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:28:50,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:50,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:50,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:50,512 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 [2021-11-12 22:28:50,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:50,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:50,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:50,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:50,844 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:50,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-12 22:28:50,915 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/75f22f70a/0639c7e9fda5401490fd40929e593c64/FLAG9779e8b99 [2021-11-12 22:28:51,711 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:51,712 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-12 22:28:51,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/75f22f70a/0639c7e9fda5401490fd40929e593c64/FLAG9779e8b99 [2021-11-12 22:28:52,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/75f22f70a/0639c7e9fda5401490fd40929e593c64 [2021-11-12 22:28:52,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:52,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:52,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:52,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:52,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:52,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:52" (1/1) ... [2021-11-12 22:28:52,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bba0bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:52, skipping insertion in model container [2021-11-12 22:28:52,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:52" (1/1) ... [2021-11-12 22:28:52,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:52,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:52,623 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-12 22:28:52,630 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-12 22:28:52,652 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:28:52,657 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:28:53,561 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,562 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,563 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,564 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,565 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,580 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,581 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:53,584 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:54,025 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:28:54,026 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:28:54,027 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:28:54,029 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:28:54,030 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:28:54,031 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:28:54,032 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:28:54,032 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:28:54,033 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:28:54,034 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:28:54,279 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:28:54,365 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:54,366 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:28:54,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:28:54,499 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 22:28:54,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38d70cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:54, skipping insertion in model container [2021-11-12 22:28:54,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:54,502 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:28:54,505 INFO L158 Benchmark]: Toolchain (without parser) took 2255.79ms. Allocated memory is still 107.0MB. Free memory was 78.0MB in the beginning and 55.2MB in the end (delta: 22.8MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2021-11-12 22:28:54,506 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 77.6MB. Free memory was 56.6MB in the beginning and 56.6MB in the end (delta: 38.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:28:54,507 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2253.13ms. Allocated memory is still 107.0MB. Free memory was 77.7MB in the beginning and 55.2MB in the end (delta: 22.4MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2021-11-12 22:28:54,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 77.6MB. Free memory was 56.6MB in the beginning and 56.6MB in the end (delta: 38.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2253.13ms. Allocated memory is still 107.0MB. Free memory was 77.7MB in the beginning and 55.2MB in the end (delta: 22.4MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:28:56,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:28:56,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:28:56,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:28:56,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:28:56,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:28:56,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:28:56,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:28:56,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:28:56,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:28:56,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:28:56,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:28:56,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:28:56,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:28:56,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:28:56,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:28:56,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:28:56,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:28:57,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:28:57,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:28:57,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:28:57,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:28:57,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:28:57,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:28:57,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:28:57,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:28:57,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:28:57,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:28:57,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:28:57,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:28:57,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:28:57,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:28:57,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:28:57,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:28:57,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:28:57,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:28:57,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:28:57,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:28:57,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:28:57,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:28:57,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:28:57,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:28:57,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:28:57,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:28:57,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:28:57,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:28:57,112 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:28:57,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:28:57,113 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:28:57,113 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:28:57,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:28:57,114 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:28:57,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:28:57,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:28:57,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:28:57,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:28:57,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:28:57,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:28:57,119 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:28:57,119 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:28:57,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:28:57,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:28:57,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:28:57,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:28:57,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:28:57,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:28:57,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:28:57,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:28:57,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:28:57,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:28:57,122 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:28:57,122 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:57,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:28:57,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:28:57,123 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:28:57,123 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8de283a79f01a407383b7daa040c59e7c5c73f52f0f9c705f7021a208716cd24 [2021-11-12 22:28:57,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:28:57,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:28:57,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:28:57,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:28:57,555 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:28:57,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-12 22:28:57,635 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/49f3a302e/d6972eac58284654b814b4b2e23a4aa4/FLAGcba45e0a6 [2021-11-12 22:28:58,651 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:28:58,652 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i [2021-11-12 22:28:58,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/49f3a302e/d6972eac58284654b814b4b2e23a4aa4/FLAGcba45e0a6 [2021-11-12 22:28:59,044 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/data/49f3a302e/d6972eac58284654b814b4b2e23a4aa4 [2021-11-12 22:28:59,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:28:59,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:28:59,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:28:59,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:28:59,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:28:59,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:59" (1/1) ... [2021-11-12 22:28:59,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d216d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:28:59, skipping insertion in model container [2021-11-12 22:28:59,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:28:59" (1/1) ... [2021-11-12 22:28:59,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:28:59,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:28:59,542 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-12 22:28:59,549 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-12 22:28:59,572 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:28:59,578 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:00,575 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,581 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,584 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,587 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,607 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,607 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,609 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:00,610 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,034 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:01,035 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:01,041 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:01,042 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:01,044 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:01,045 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:01,046 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:01,046 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:01,047 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:01,048 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:01,247 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:01,383 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,384 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:01,517 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:29:01,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:01,593 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-12 22:29:01,594 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-12 22:29:01,596 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:29:01,596 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:01,638 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,638 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,639 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,639 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,640 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,662 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,663 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,664 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,664 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,718 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:01,719 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:01,720 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:01,721 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:01,726 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:01,730 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:01,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:01,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:01,732 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:01,733 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:01,775 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:01,864 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,864 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:01,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:01,943 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:01,973 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4498,4511] [2021-11-12 22:29:01,974 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_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/sv-benchmarks/c/aws-c-common/aws_array_eq_ignore_case_harness.i[4558,4571] [2021-11-12 22:29:01,976 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:29:01,977 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:29:02,026 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,027 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,027 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,027 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,028 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,056 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,058 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,058 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,091 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:29:02,092 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:29:02,093 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:29:02,093 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:29:02,094 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:29:02,095 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:29:02,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:29:02,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:29:02,097 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:29:02,097 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:29:02,125 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:29:02,227 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,228 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:29:02,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:02,728 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:02,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02 WrapperNode [2021-11-12 22:29:02,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:02,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:02,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:02,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:02,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:02,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:03,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:03,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:03,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:03,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:03,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:03,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:03,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:03,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (1/1) ... [2021-11-12 22:29:03,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:03,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:03,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:03,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-11-12 22:29:03,351 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-11-12 22:29:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:29:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 22:29:03,352 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 22:29:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:29:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:29:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:29:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:29:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:29:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-12 22:29:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-12 22:29:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 22:29:03,355 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 22:29:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:29:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-12 22:29:03,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-12 22:29:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:29:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-12 22:29:03,357 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-12 22:29:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:29:03,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:29:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:29:03,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:29:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:29:17,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:17,499 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:29:17,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:17 BoogieIcfgContainer [2021-11-12 22:29:17,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:17,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:17,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:17,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:17,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:28:59" (1/3) ... [2021-11-12 22:29:17,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337d3998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:17, skipping insertion in model container [2021-11-12 22:29:17,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:02" (2/3) ... [2021-11-12 22:29:17,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337d3998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:17, skipping insertion in model container [2021-11-12 22:29:17,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:17" (3/3) ... [2021-11-12 22:29:17,511 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_eq_ignore_case_harness.i [2021-11-12 22:29:17,516 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:17,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:29:17,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:17,632 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 22:29:17,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:29:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-12 22:29:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:29:17,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:17,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:29:17,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash 106347311, now seen corresponding path program 1 times [2021-11-12 22:29:17,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:17,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655348748] [2021-11-12 22:29:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:17,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:17,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:17,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:17,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:29:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:29:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:29:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:29:22,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:22,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655348748] [2021-11-12 22:29:22,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655348748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:22,575 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:22,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:29:22,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801879863] [2021-11-12 22:29:22,581 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:22,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:29:22,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:22,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:29:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:29:22,629 INFO L87 Difference]: Start difference. First operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 51 states have internal predecessors, (61), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:29:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:22,681 INFO L93 Difference]: Finished difference Result 151 states and 216 transitions. [2021-11-12 22:29:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:29:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 65 [2021-11-12 22:29:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:22,708 INFO L225 Difference]: With dead ends: 151 [2021-11-12 22:29:22,710 INFO L226 Difference]: Without dead ends: 72 [2021-11-12 22:29:22,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:29:22,719 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:22,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 3.85ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:29:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-12 22:29:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-12 22:29:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 46 states have internal predecessors, (53), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-12 22:29:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-12 22:29:22,768 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 65 [2021-11-12 22:29:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:22,769 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-12 22:29:22,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:29:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-12 22:29:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 22:29:22,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:22,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:29:22,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:22,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:22,975 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash -566993231, now seen corresponding path program 1 times [2021-11-12 22:29:22,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:22,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659066400] [2021-11-12 22:29:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:22,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:22,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:22,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:29:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:26,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:29:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:29:28,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:29:29,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:29,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659066400] [2021-11-12 22:29:29,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659066400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:29,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426312321] [2021-11-12 22:29:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:29,181 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:29,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:29,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 22:29:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:29:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:31,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426312321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:31,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:31,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [13, 8] total 17 [2021-11-12 22:29:31,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797796714] [2021-11-12 22:29:31,528 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:31,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:31,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:29:31,531 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 22:29:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:31,734 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2021-11-12 22:29:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:29:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 65 [2021-11-12 22:29:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:31,740 INFO L225 Difference]: With dead ends: 105 [2021-11-12 22:29:31,740 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 22:29:31,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:29:31,742 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 15 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:31,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 338 Invalid, 37 Unknown, 0 Unchecked, 5.20ms Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 134.00ms Time] [2021-11-12 22:29:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 22:29:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-11-12 22:29:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 51 states have internal predecessors, (56), 25 states have call successors, (25), 8 states have call predecessors, (25), 9 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-11-12 22:29:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2021-11-12 22:29:31,765 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 65 [2021-11-12 22:29:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:31,766 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2021-11-12 22:29:31,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 22:29:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2021-11-12 22:29:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 22:29:31,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:31,772 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:29:31,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:31,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:32,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:32,185 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1579169156, now seen corresponding path program 1 times [2021-11-12 22:29:32,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:32,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276641834] [2021-11-12 22:29:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:32,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:32,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:32,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:29:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:29:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:36,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:36,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:36,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276641834] [2021-11-12 22:29:36,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276641834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:36,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:36,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:29:36,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423140310] [2021-11-12 22:29:36,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:36,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:36,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:29:36,937 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:29:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:37,048 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2021-11-12 22:29:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-11-12 22:29:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:37,053 INFO L225 Difference]: With dead ends: 93 [2021-11-12 22:29:37,053 INFO L226 Difference]: Without dead ends: 91 [2021-11-12 22:29:37,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:29:37,054 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 12 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.02ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:37,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 453 Invalid, 35 Unknown, 0 Unchecked, 5.02ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 71.76ms Time] [2021-11-12 22:29:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-12 22:29:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-11-12 22:29:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-12 22:29:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2021-11-12 22:29:37,068 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 67 [2021-11-12 22:29:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:37,069 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2021-11-12 22:29:37,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:29:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2021-11-12 22:29:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:29:37,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:37,072 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:29:37,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:37,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:37,273 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2051455754, now seen corresponding path program 1 times [2021-11-12 22:29:37,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:37,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613898327] [2021-11-12 22:29:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:37,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:37,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:37,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:37,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:29:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:29:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:41,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:41,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:41,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613898327] [2021-11-12 22:29:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613898327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:41,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:41,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:29:41,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414279684] [2021-11-12 22:29:41,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:41,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:41,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:29:41,892 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 22:29:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:41,931 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2021-11-12 22:29:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:29:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 71 [2021-11-12 22:29:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:41,935 INFO L225 Difference]: With dead ends: 107 [2021-11-12 22:29:41,935 INFO L226 Difference]: Without dead ends: 91 [2021-11-12 22:29:41,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:29:41,937 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:41,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 448 Invalid, 13 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 27.68ms Time] [2021-11-12 22:29:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-12 22:29:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-12 22:29:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (28), 26 states have call predecessors, (28), 25 states have call successors, (28) [2021-11-12 22:29:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-11-12 22:29:41,953 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 71 [2021-11-12 22:29:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:41,954 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-11-12 22:29:41,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 22:29:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-11-12 22:29:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:29:41,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:41,957 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:29:42,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:29:42,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:42,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash 753126495, now seen corresponding path program 1 times [2021-11-12 22:29:42,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:42,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254389711] [2021-11-12 22:29:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:42,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:42,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:42,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:29:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:29:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:29:46,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:29:47,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:47,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254389711] [2021-11-12 22:29:47,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254389711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:47,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1568439355] [2021-11-12 22:29:47,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:47,767 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:47,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:47,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:47,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:29:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:55,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:29:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:29:56,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:57,522 INFO L354 Elim1Store]: treesize reduction 9, result has 85.9 percent of original size [2021-11-12 22:29:57,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 74 [2021-11-12 22:29:59,456 INFO L354 Elim1Store]: treesize reduction 13, result has 82.9 percent of original size [2021-11-12 22:29:59,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 82 [2021-11-12 22:30:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:30:01,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1568439355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:01,596 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:01,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 7] imperfect sequences [12, 11] total 28 [2021-11-12 22:30:01,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290499317] [2021-11-12 22:30:01,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:01,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:30:01,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:30:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:30:01,599 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:30:04,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:11,028 INFO L93 Difference]: Finished difference Result 160 states and 225 transitions. [2021-11-12 22:30:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:30:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 71 [2021-11-12 22:30:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:11,040 INFO L225 Difference]: With dead ends: 160 [2021-11-12 22:30:11,041 INFO L226 Difference]: Without dead ends: 138 [2021-11-12 22:30:11,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=132, Invalid=989, Unknown=1, NotChecked=0, Total=1122 [2021-11-12 22:30:11,044 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 45 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2573.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.79ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2699.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:11,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1165 Invalid, 269 Unknown, 0 Unchecked, 13.79ms Time], IncrementalHoareTripleChecker [18 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2699.72ms Time] [2021-11-12 22:30:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-12 22:30:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 88. [2021-11-12 22:30:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.196078431372549) internal successors, (61), 55 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-12 22:30:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2021-11-12 22:30:11,068 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 71 [2021-11-12 22:30:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:11,068 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2021-11-12 22:30:11,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:30:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2021-11-12 22:30:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:30:11,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:11,077 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:11,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:11,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:11,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:11,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -259725272, now seen corresponding path program 1 times [2021-11-12 22:30:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:11,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169712064] [2021-11-12 22:30:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:11,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:11,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:11,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:30:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:30:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:30:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:30:19,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:19,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169712064] [2021-11-12 22:30:19,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169712064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:19,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326124569] [2021-11-12 22:30:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:19,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:19,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:19,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:19,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:30:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:20,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:30:20,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:30:21,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326124569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:21,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:21,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 15] total 27 [2021-11-12 22:30:21,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900833000] [2021-11-12 22:30:21,024 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:21,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:30:21,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:30:21,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:30:21,025 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:30:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:21,044 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2021-11-12 22:30:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:30:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 81 [2021-11-12 22:30:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:21,047 INFO L225 Difference]: With dead ends: 105 [2021-11-12 22:30:21,047 INFO L226 Difference]: Without dead ends: 88 [2021-11-12 22:30:21,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:30:21,049 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:21,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 270 Invalid, 7 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 12.83ms Time] [2021-11-12 22:30:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-12 22:30:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-12 22:30:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 55 states have internal predecessors, (60), 26 states have call successors, (26), 9 states have call predecessors, (26), 10 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-12 22:30:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2021-11-12 22:30:21,063 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 81 [2021-11-12 22:30:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:21,063 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2021-11-12 22:30:21,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:30:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2021-11-12 22:30:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:30:21,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:21,066 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:21,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:21,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:30:21,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:21,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash 510934331, now seen corresponding path program 1 times [2021-11-12 22:30:21,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:21,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710183628] [2021-11-12 22:30:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:21,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:21,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:21,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:21,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:30:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:25,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-12 22:30:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:30:26,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:30:28,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:28,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710183628] [2021-11-12 22:30:28,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710183628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:28,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [307854370] [2021-11-12 22:30:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:28,348 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:28,349 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:28,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:30:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:30:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:30:36,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:30:37,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [307854370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:37,085 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:37,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [16, 15] total 29 [2021-11-12 22:30:37,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768496781] [2021-11-12 22:30:37,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:37,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:30:37,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:30:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:30:37,088 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:30:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:37,573 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2021-11-12 22:30:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:30:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 83 [2021-11-12 22:30:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:37,577 INFO L225 Difference]: With dead ends: 107 [2021-11-12 22:30:37,577 INFO L226 Difference]: Without dead ends: 103 [2021-11-12 22:30:37,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:30:37,579 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 31 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 293.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 331.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:37,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 661 Invalid, 110 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 331.83ms Time] [2021-11-12 22:30:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-12 22:30:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2021-11-12 22:30:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2021-11-12 22:30:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-12 22:30:37,593 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 83 [2021-11-12 22:30:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:37,594 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-12 22:30:37,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:30:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-12 22:30:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 22:30:37,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:37,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:30:37,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:37,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:38,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:38,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1615573390, now seen corresponding path program 1 times [2021-11-12 22:30:38,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:38,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625563691] [2021-11-12 22:30:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:38,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:38,016 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:38,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:30:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:30:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:30:42,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:30:42,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:42,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625563691] [2021-11-12 22:30:42,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625563691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:42,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558118388] [2021-11-12 22:30:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:42,750 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:42,751 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:42,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:30:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:30:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:30:44,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:30:45,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [558118388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:45,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:45,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9, 9] total 15 [2021-11-12 22:30:45,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19360183] [2021-11-12 22:30:45,010 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:45,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:30:45,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:30:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:30:45,012 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:30:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:45,251 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2021-11-12 22:30:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:30:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 76 [2021-11-12 22:30:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:45,254 INFO L225 Difference]: With dead ends: 120 [2021-11-12 22:30:45,254 INFO L226 Difference]: Without dead ends: 105 [2021-11-12 22:30:45,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 283 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:30:45,256 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 32 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:45,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 332 Invalid, 38 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 138.21ms Time] [2021-11-12 22:30:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-12 22:30:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2021-11-12 22:30:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (30), 28 states have call predecessors, (30), 27 states have call successors, (30) [2021-11-12 22:30:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2021-11-12 22:30:45,270 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 76 [2021-11-12 22:30:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:45,271 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2021-11-12 22:30:45,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:30:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2021-11-12 22:30:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:30:45,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:45,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 22:30:45,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:45,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:45,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:45,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 701182204, now seen corresponding path program 1 times [2021-11-12 22:30:45,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:45,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895518156] [2021-11-12 22:30:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:45,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:45,689 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:45,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:30:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:49,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:30:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:30:50,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:30:51,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:51,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895518156] [2021-11-12 22:30:51,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895518156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:51,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2001180159] [2021-11-12 22:30:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:51,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:51,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:51,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:51,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:30:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:52,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:30:52,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:30:53,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2001180159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:53,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:53,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 17 [2021-11-12 22:30:53,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498114634] [2021-11-12 22:30:53,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:53,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:30:53,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:30:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:30:53,220 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 22:30:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:53,370 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2021-11-12 22:30:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 77 [2021-11-12 22:30:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:53,372 INFO L225 Difference]: With dead ends: 122 [2021-11-12 22:30:53,372 INFO L226 Difference]: Without dead ends: 105 [2021-11-12 22:30:53,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:30:53,374 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 4 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:53,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 352 Invalid, 28 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 104.77ms Time] [2021-11-12 22:30:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-12 22:30:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-11-12 22:30:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 29 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2021-11-12 22:30:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2021-11-12 22:30:53,399 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 77 [2021-11-12 22:30:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:53,405 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2021-11-12 22:30:53,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 22:30:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2021-11-12 22:30:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 22:30:53,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:53,408 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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 22:30:53,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:53,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:53,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:53,815 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:53,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash -924404138, now seen corresponding path program 1 times [2021-11-12 22:30:53,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:53,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901811862] [2021-11-12 22:30:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:53,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:53,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:53,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:30:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:30:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:30:58,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:30:59,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:59,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901811862] [2021-11-12 22:30:59,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901811862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:59,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [474640706] [2021-11-12 22:30:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:59,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:59,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:59,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:59,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:31:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:31:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:31:08,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:31:08,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [474640706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:08,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:31:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [12, 11] total 20 [2021-11-12 22:31:08,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546348376] [2021-11-12 22:31:08,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:08,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:31:08,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:31:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:31:08,758 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:31:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:08,956 INFO L93 Difference]: Finished difference Result 154 states and 206 transitions. [2021-11-12 22:31:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:31:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 79 [2021-11-12 22:31:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:08,959 INFO L225 Difference]: With dead ends: 154 [2021-11-12 22:31:08,959 INFO L226 Difference]: Without dead ends: 140 [2021-11-12 22:31:08,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:31:08,961 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 10 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:08,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 669 Invalid, 46 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 139.83ms Time] [2021-11-12 22:31:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-12 22:31:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-11-12 22:31:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 45 states have call successors, (45), 11 states have call predecessors, (45), 13 states have return successors, (51), 47 states have call predecessors, (51), 44 states have call successors, (51) [2021-11-12 22:31:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 184 transitions. [2021-11-12 22:31:08,974 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 184 transitions. Word has length 79 [2021-11-12 22:31:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:08,975 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 184 transitions. [2021-11-12 22:31:08,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:31:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 184 transitions. [2021-11-12 22:31:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:31:08,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:08,977 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:08,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:09,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:09,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:09,391 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -727359888, now seen corresponding path program 1 times [2021-11-12 22:31:09,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:09,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055130466] [2021-11-12 22:31:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:09,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:09,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:09,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:09,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:31:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:31:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:31:14,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:31:16,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:16,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055130466] [2021-11-12 22:31:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055130466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:16,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733422290] [2021-11-12 22:31:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:16,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:16,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:16,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:31:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:31:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 22:31:25,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 22:31:25,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733422290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:25,451 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:31:25,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [16, 15] total 29 [2021-11-12 22:31:25,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889804957] [2021-11-12 22:31:25,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:25,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:31:25,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:25,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:31:25,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:31:25,455 INFO L87 Difference]: Start difference. First operand 135 states and 184 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:31:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:25,633 INFO L93 Difference]: Finished difference Result 180 states and 249 transitions. [2021-11-12 22:31:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:31:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 86 [2021-11-12 22:31:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:25,635 INFO L225 Difference]: With dead ends: 180 [2021-11-12 22:31:25,635 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 22:31:25,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:31:25,636 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 7 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:25,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 761 Invalid, 36 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 99.89ms Time] [2021-11-12 22:31:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 22:31:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-12 22:31:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.146341463414634) internal successors, (94), 85 states have internal predecessors, (94), 52 states have call successors, (52), 11 states have call predecessors, (52), 13 states have return successors, (57), 55 states have call predecessors, (57), 50 states have call successors, (57) [2021-11-12 22:31:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 203 transitions. [2021-11-12 22:31:25,651 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 203 transitions. Word has length 86 [2021-11-12 22:31:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:25,651 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 203 transitions. [2021-11-12 22:31:25,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:31:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 203 transitions. [2021-11-12 22:31:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:31:25,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:25,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:25,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:25,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:26,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:26,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1272343607, now seen corresponding path program 1 times [2021-11-12 22:31:26,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:26,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810925916] [2021-11-12 22:31:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:26,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:26,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:26,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:31:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:31:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:31:30,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-12 22:31:32,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:32,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810925916] [2021-11-12 22:31:32,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810925916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:32,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1022268876] [2021-11-12 22:31:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:32,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:32,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:32,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:31:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:31:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 22:31:40,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-12 22:31:43,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1022268876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:43,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026590420] [2021-11-12 22:31:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:43,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:43,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:43,360 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:43,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-12 22:31:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:31:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-12 22:31:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-12 22:31:45,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026590420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:45,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:31:45,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17, 17, 12, 12] total 36 [2021-11-12 22:31:45,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783759186] [2021-11-12 22:31:45,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:45,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 22:31:45,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 22:31:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 22:31:45,916 INFO L87 Difference]: Start difference. First operand 148 states and 203 transitions. Second operand has 36 states, 32 states have (on average 2.6875) internal successors, (86), 31 states have internal predecessors, (86), 14 states have call successors, (33), 2 states have call predecessors, (33), 9 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) [2021-11-12 22:31:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:51,094 INFO L93 Difference]: Finished difference Result 228 states and 339 transitions. [2021-11-12 22:31:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 22:31:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.6875) internal successors, (86), 31 states have internal predecessors, (86), 14 states have call successors, (33), 2 states have call predecessors, (33), 9 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) Word has length 90 [2021-11-12 22:31:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:51,098 INFO L225 Difference]: With dead ends: 228 [2021-11-12 22:31:51,099 INFO L226 Difference]: Without dead ends: 185 [2021-11-12 22:31:51,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 499 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 22:31:51,101 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 143 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3872.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.97ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4206.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:51,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 2276 Invalid, 1309 Unknown, 0 Unchecked, 15.97ms Time], IncrementalHoareTripleChecker [80 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 4206.77ms Time] [2021-11-12 22:31:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-12 22:31:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 158. [2021-11-12 22:31:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 91 states have internal predecessors, (98), 56 states have call successors, (56), 11 states have call predecessors, (56), 15 states have return successors, (74), 60 states have call predecessors, (74), 54 states have call successors, (74) [2021-11-12 22:31:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 228 transitions. [2021-11-12 22:31:51,125 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 228 transitions. Word has length 90 [2021-11-12 22:31:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:51,126 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 228 transitions. [2021-11-12 22:31:51,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.6875) internal successors, (86), 31 states have internal predecessors, (86), 14 states have call successors, (33), 2 states have call predecessors, (33), 9 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) [2021-11-12 22:31:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 228 transitions. [2021-11-12 22:31:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:31:51,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:51,129 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-12 22:31:51,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:51,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-12 22:31:51,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:51,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:51,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1393074342, now seen corresponding path program 1 times [2021-11-12 22:31:51,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:51,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928969385] [2021-11-12 22:31:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:51,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:51,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:51,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:51,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:31:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:31:55,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:31:56,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:31:57,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:57,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928969385] [2021-11-12 22:31:57,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928969385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:57,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729833390] [2021-11-12 22:31:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:57,140 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:57,141 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:57,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 22:32:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:32:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:32:05,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:32:06,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1729833390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:06,103 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:32:06,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [12, 11] total 21 [2021-11-12 22:32:06,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292986079] [2021-11-12 22:32:06,104 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:06,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:32:06,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:32:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:32:06,105 INFO L87 Difference]: Start difference. First operand 158 states and 228 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:32:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:06,388 INFO L93 Difference]: Finished difference Result 180 states and 251 transitions. [2021-11-12 22:32:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:32:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 85 [2021-11-12 22:32:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:06,390 INFO L225 Difference]: With dead ends: 180 [2021-11-12 22:32:06,391 INFO L226 Difference]: Without dead ends: 153 [2021-11-12 22:32:06,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:32:06,392 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 20 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:06,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 806 Invalid, 70 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 165.59ms Time] [2021-11-12 22:32:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-12 22:32:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2021-11-12 22:32:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 50 states have call successors, (50), 11 states have call predecessors, (50), 15 states have return successors, (66), 54 states have call predecessors, (66), 48 states have call successors, (66) [2021-11-12 22:32:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-11-12 22:32:06,428 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 85 [2021-11-12 22:32:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:06,428 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-11-12 22:32:06,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:32:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-11-12 22:32:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:32:06,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:06,431 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-12 22:32:06,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:06,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:06,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:06,856 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1085947873, now seen corresponding path program 1 times [2021-11-12 22:32:06,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:06,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136154298] [2021-11-12 22:32:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:06,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:06,860 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:06,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:32:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-12 22:32:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 22:32:12,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:32:15,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136154298] [2021-11-12 22:32:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136154298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1084281338] [2021-11-12 22:32:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:15,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:15,162 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:15,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:32:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:32:22,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 22:32:23,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 22:32:24,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1084281338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:24,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:32:24,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [23, 22] total 38 [2021-11-12 22:32:24,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389787673] [2021-11-12 22:32:24,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:24,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:32:24,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:32:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:32:24,359 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:32:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:25,214 INFO L93 Difference]: Finished difference Result 188 states and 273 transitions. [2021-11-12 22:32:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:32:25,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 97 [2021-11-12 22:32:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:25,217 INFO L225 Difference]: With dead ends: 188 [2021-11-12 22:32:25,218 INFO L226 Difference]: Without dead ends: 159 [2021-11-12 22:32:25,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:32:25,219 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 21 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 480.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 552.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:25,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1083 Invalid, 134 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 552.92ms Time] [2021-11-12 22:32:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-12 22:32:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2021-11-12 22:32:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 50 states have call successors, (50), 11 states have call predecessors, (50), 15 states have return successors, (64), 54 states have call predecessors, (64), 48 states have call successors, (64) [2021-11-12 22:32:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 207 transitions. [2021-11-12 22:32:25,234 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 207 transitions. Word has length 97 [2021-11-12 22:32:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:25,235 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 207 transitions. [2021-11-12 22:32:25,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:32:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 207 transitions. [2021-11-12 22:32:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:32:25,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:25,237 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:25,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:25,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:25,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:25,652 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1647697566, now seen corresponding path program 1 times [2021-11-12 22:32:25,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:25,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876737964] [2021-11-12 22:32:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:25,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:25,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:25,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa67c96-edbb-4358-964e-7c4c0aeb86f4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:34:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-12 22:34:31,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 79 [2021-11-12 22:34:38,959 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ BitVec 64)) (|v_save_byte_from_array_#in~storage#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|save_byte_from_array_nondet_size_t_#res#1| (_ BitVec 64))) (let ((.cse0 (select |c_#memory_int| |v_save_byte_from_array_#in~storage#1.base_BEFORE_CALL_1|))) (and (= ((_ extract 39 32) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd (_ bv4 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|))) (= (select .cse0 (bvadd (_ bv1 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) ((_ extract 15 8) |save_byte_from_array_nondet_size_t_#res#1|)) (= ((_ extract 31 24) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd (_ bv3 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|))) (= ((_ extract 7 0) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) (= ((_ extract 55 48) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv6 64)))) (= (select .cse0 (bvadd (_ bv2 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) ((_ extract 23 16) |save_byte_from_array_nondet_size_t_#res#1|)) (= (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv5 64))) ((_ extract 47 40) |save_byte_from_array_nondet_size_t_#res#1|)) (= (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv7 64))) ((_ extract 63 56) |save_byte_from_array_nondet_size_t_#res#1|))))) is different from true