./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs --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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:56:48,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:56:48,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:56:48,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:56:48,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:56:48,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:56:48,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:56:48,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:56:48,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:56:48,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:56:48,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:56:48,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:56:48,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:56:48,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:56:48,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:56:48,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:56:48,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:56:48,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:56:48,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:56:48,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:56:48,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:56:48,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:56:48,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:56:48,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:56:48,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:56:48,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:56:48,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:56:48,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:56:48,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:56:48,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:56:48,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:56:48,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:56:48,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:56:48,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:56:48,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:56:48,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:56:48,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:56:48,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:56:48,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:56:48,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:56:48,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:56:48,740 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:56:48,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:56:48,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:56:48,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:56:48,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:56:48,800 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:56:48,800 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:56:48,801 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:56:48,801 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:56:48,801 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:56:48,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:56:48,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:56:48,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:56:48,804 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:56:48,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:56:48,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:56:48,805 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:56:48,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:56:48,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:56:48,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:56:48,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:56:48,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:56:48,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:56:48,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:56:48,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:56:48,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:56:48,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:56:48,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:56:48,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:56:48,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:48,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:56:48,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:56:48,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:56:48,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:56:48,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:56:48,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:56:48,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:56:48,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:56:48,812 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_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-11-19 14:56:49,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:56:49,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:56:49,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:56:49,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:56:49,160 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:56:49,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-19 14:56:49,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/f8ab67b79/ca64abf002b44b40b34a4b1c0e57db01/FLAGf7291c3bd [2021-11-19 14:56:50,263 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:56:50,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-19 14:56:50,326 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/f8ab67b79/ca64abf002b44b40b34a4b1c0e57db01/FLAGf7291c3bd [2021-11-19 14:56:50,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/f8ab67b79/ca64abf002b44b40b34a4b1c0e57db01 [2021-11-19 14:56:50,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:56:50,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:56:50,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:50,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:56:50,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:56:50,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:50" (1/1) ... [2021-11-19 14:56:50,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b48233f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:50, skipping insertion in model container [2021-11-19 14:56:50,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:50" (1/1) ... [2021-11-19 14:56:50,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:56:50,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:51,097 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-19 14:56:51,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-19 14:56:51,134 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:56:51,141 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:56:52,311 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,312 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,313 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,314 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,315 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,331 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,332 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,334 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,335 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:52,854 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:56:52,856 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:56:52,857 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:56:52,860 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:56:52,866 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:56:52,869 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:56:52,874 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:56:52,876 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:56:52,877 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:56:52,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:56:53,199 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:56:53,324 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:53,325 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:56:53,443 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:56:53,498 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) [2021-11-19 14:56:53,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@997c29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:53, skipping insertion in model container [2021-11-19 14:56:53,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:53,500 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:56:53,502 INFO L158 Benchmark]: Toolchain (without parser) took 2849.80ms. Allocated memory is still 96.5MB. Free memory was 67.7MB in the beginning and 45.1MB in the end (delta: 22.7MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2021-11-19 14:56:53,503 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory is still 58.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:56:53,504 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2846.76ms. Allocated memory is still 96.5MB. Free memory was 67.5MB in the beginning and 45.1MB in the end (delta: 22.4MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2021-11-19 14:56:53,505 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory is still 58.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2846.76ms. Allocated memory is still 96.5MB. Free memory was 67.5MB in the beginning and 45.1MB in the end (delta: 22.4MB). Peak memory consumption was 29.1MB. 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_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs --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 e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:56:56,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:56:56,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:56:56,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:56:56,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:56:56,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:56:56,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:56:56,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:56:56,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:56:56,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:56:56,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:56:56,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:56:56,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:56:56,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:56:56,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:56:56,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:56:56,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:56:56,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:56:56,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:56:56,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:56:56,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:56:56,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:56:56,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:56:56,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:56:56,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:56:56,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:56:56,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:56:56,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:56:56,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:56:56,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:56:56,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:56:56,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:56:56,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:56:56,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:56:56,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:56:56,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:56:56,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:56:56,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:56:56,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:56:56,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:56:56,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:56:56,348 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:56:56,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:56:56,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:56:56,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:56:56,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:56:56,403 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:56:56,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:56:56,403 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:56:56,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:56:56,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:56:56,405 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:56:56,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:56:56,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:56:56,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:56:56,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:56:56,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:56:56,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:56:56,410 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:56:56,410 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:56:56,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:56:56,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:56:56,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:56:56,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:56:56,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:56:56,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:56:56,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:56:56,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:56:56,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:56:56,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:56:56,414 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:56:56,414 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:56:56,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:56:56,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:56:56,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:56:56,415 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_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-11-19 14:56:56,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:56:56,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:56:56,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:56:56,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:56:56,859 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:56:56,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-19 14:56:56,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/4ae48bd0b/83ecbec2b90c472787ead05c3fca5205/FLAG12a9af084 [2021-11-19 14:56:57,972 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:56:57,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-19 14:56:58,033 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/4ae48bd0b/83ecbec2b90c472787ead05c3fca5205/FLAG12a9af084 [2021-11-19 14:56:58,454 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/data/4ae48bd0b/83ecbec2b90c472787ead05c3fca5205 [2021-11-19 14:56:58,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:56:58,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:56:58,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:56:58,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:56:58,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:56:58,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:58" (1/1) ... [2021-11-19 14:56:58,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5f6fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:56:58, skipping insertion in model container [2021-11-19 14:56:58,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:56:58" (1/1) ... [2021-11-19 14:56:58,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:56:58,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:56:59,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-19 14:56:59,056 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-19 14:56:59,088 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:56:59,096 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:57:00,157 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,158 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,158 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,159 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,161 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,179 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,180 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,182 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,188 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:00,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:57:00,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:57:00,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:57:00,885 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:57:00,890 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:57:00,894 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:57:00,895 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:57:00,898 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:57:00,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:57:00,902 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:57:01,123 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:57:01,266 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,266 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,373 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:01,462 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:57:01,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:57:01,536 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-19 14:57:01,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-19 14:57:01,540 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:57:01,543 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:57:01,601 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,602 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,602 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,603 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,604 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,611 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,612 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,613 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,614 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,655 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:57:01,656 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:57:01,657 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:57:01,658 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:57:01,659 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:57:01,660 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:57:01,660 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:57:01,661 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:57:01,662 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:57:01,662 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:57:01,688 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:57:01,771 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,772 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,810 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:01,900 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:57:01,927 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-19 14:57:01,928 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-19 14:57:01,930 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:57:01,931 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:57:01,989 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,989 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,990 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,990 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,991 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,999 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:01,999 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:02,032 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:02,032 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:02,095 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:57:02,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:57:02,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:57:02,097 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:57:02,098 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:57:02,100 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:57:02,100 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:57:02,101 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:57:02,101 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:57:02,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:57:02,168 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:57:02,294 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:02,295 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:57:02,323 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:02,733 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:57:02,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02 WrapperNode [2021-11-19 14:57:02,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:02,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:02,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:57:02,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:57:02,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:02,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,079 INFO L137 Inliner]: procedures = 713, calls = 2621, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 863 [2021-11-19 14:57:03,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:03,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:57:03,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:57:03,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:57:03,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:57:03,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:57:03,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:57:03,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:57:03,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (1/1) ... [2021-11-19 14:57:03,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:03,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:57:03,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:57:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2021-11-19 14:57:03,340 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 14:57:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 14:57:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:57:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 14:57:03,341 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 14:57:03,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:57:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:57:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:57:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:57:03,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:57:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:57:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:57:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:57:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-19 14:57:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-19 14:57:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:57:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:57:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 14:57:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 14:57:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:57:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 14:57:03,346 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 14:57:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:57:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:57:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:57:03,346 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:57:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-19 14:57:03,347 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-19 14:57:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:57:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:57:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-19 14:57:03,348 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-19 14:57:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:57:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:57:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:57:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:57:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 14:57:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 14:57:03,842 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:57:03,844 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:57:08,226 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:57:08,241 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:57:08,242 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:57:08,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:08 BoogieIcfgContainer [2021-11-19 14:57:08,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:57:08,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:57:08,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:57:08,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:57:08,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:56:58" (1/3) ... [2021-11-19 14:57:08,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141b910e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:08, skipping insertion in model container [2021-11-19 14:57:08,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:02" (2/3) ... [2021-11-19 14:57:08,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141b910e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:08, skipping insertion in model container [2021-11-19 14:57:08,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:08" (3/3) ... [2021-11-19 14:57:08,266 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2021-11-19 14:57:08,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:57:08,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:57:08,342 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:57:08,349 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 [2021-11-19 14:57:08,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:57:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-19 14:57:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:57:08,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:08,400 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:08,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1408968499, now seen corresponding path program 1 times [2021-11-19 14:57:08,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:08,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164539331] [2021-11-19 14:57:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:08,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:08,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:08,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:08,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:57:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:57:09,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:57:09,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 14:57:10,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:10,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164539331] [2021-11-19 14:57:10,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164539331] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:10,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:10,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 14:57:10,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961462957] [2021-11-19 14:57:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:10,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:57:10,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:57:10,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:57:10,147 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:10,196 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-11-19 14:57:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:57:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-19 14:57:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:10,211 INFO L225 Difference]: With dead ends: 260 [2021-11-19 14:57:10,211 INFO L226 Difference]: Without dead ends: 127 [2021-11-19 14:57:10,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:57:10,221 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:10,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:57:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-19 14:57:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-19 14:57:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-19 14:57:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2021-11-19 14:57:10,287 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2021-11-19 14:57:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:10,287 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2021-11-19 14:57:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2021-11-19 14:57:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:57:10,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:10,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:10,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:10,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:10,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1559261231, now seen corresponding path program 1 times [2021-11-19 14:57:10,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:10,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799052299] [2021-11-19 14:57:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:10,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:10,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:10,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:57:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:11,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:57:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:57:11,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 14:57:12,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:12,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799052299] [2021-11-19 14:57:12,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799052299] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:12,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:12,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 14:57:12,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464374969] [2021-11-19 14:57:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:12,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:12,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:12,345 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:57:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:12,683 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-11-19 14:57:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:57:12,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2021-11-19 14:57:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:12,689 INFO L225 Difference]: With dead ends: 232 [2021-11-19 14:57:12,689 INFO L226 Difference]: Without dead ends: 130 [2021-11-19 14:57:12,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:12,691 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 48 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:12,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 534 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:57:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-19 14:57:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-19 14:57:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-19 14:57:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2021-11-19 14:57:12,715 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2021-11-19 14:57:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:12,716 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2021-11-19 14:57:12,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:57:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2021-11-19 14:57:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:57:12,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:12,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:12,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:12,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:12,940 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -112396410, now seen corresponding path program 1 times [2021-11-19 14:57:12,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:12,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367911474] [2021-11-19 14:57:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:12,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:12,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:12,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:57:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:13,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:57:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:14,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 14:57:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:57:15,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-19 14:57:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 14:57:16,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:16,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367911474] [2021-11-19 14:57:16,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367911474] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:16,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:16,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-19 14:57:16,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682935479] [2021-11-19 14:57:16,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:16,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:57:16,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:57:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:57:16,758 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-19 14:57:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:17,100 INFO L93 Difference]: Finished difference Result 255 states and 339 transitions. [2021-11-19 14:57:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:57:17,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-11-19 14:57:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:17,109 INFO L225 Difference]: With dead ends: 255 [2021-11-19 14:57:17,111 INFO L226 Difference]: Without dead ends: 143 [2021-11-19 14:57:17,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:57:17,116 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 23 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:17,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1046 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2021-11-19 14:57:17,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-19 14:57:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-19 14:57:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 98 states have internal predecessors, (116), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-19 14:57:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 188 transitions. [2021-11-19 14:57:17,174 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 188 transitions. Word has length 92 [2021-11-19 14:57:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:17,177 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 188 transitions. [2021-11-19 14:57:17,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-19 14:57:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 188 transitions. [2021-11-19 14:57:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:57:17,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:17,187 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:17,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:17,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:17,388 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash 89427524, now seen corresponding path program 1 times [2021-11-19 14:57:17,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:17,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783623898] [2021-11-19 14:57:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:17,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:17,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:17,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:57:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:57:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:57:18,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:57:18,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:18,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783623898] [2021-11-19 14:57:18,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783623898] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:18,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:18,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:57:18,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156207330] [2021-11-19 14:57:18,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:18,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:57:18,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:57:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:57:18,957 INFO L87 Difference]: Start difference. First operand 143 states and 188 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:19,029 INFO L93 Difference]: Finished difference Result 258 states and 351 transitions. [2021-11-19 14:57:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:57:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2021-11-19 14:57:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:19,036 INFO L225 Difference]: With dead ends: 258 [2021-11-19 14:57:19,036 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 14:57:19,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:19,043 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 20 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:19,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 490 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:57:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 14:57:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2021-11-19 14:57:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-19 14:57:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 181 transitions. [2021-11-19 14:57:19,076 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 181 transitions. Word has length 92 [2021-11-19 14:57:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:19,076 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 181 transitions. [2021-11-19 14:57:19,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 181 transitions. [2021-11-19 14:57:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:57:19,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:19,087 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:19,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:19,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:19,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1213803650, now seen corresponding path program 1 times [2021-11-19 14:57:19,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:19,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121115653] [2021-11-19 14:57:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:19,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:19,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:19,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:19,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:57:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:20,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:57:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:57:21,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:57:21,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:21,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121115653] [2021-11-19 14:57:21,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121115653] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:21,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:21,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 14:57:21,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274527245] [2021-11-19 14:57:21,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:21,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:21,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:57:21,893 INFO L87 Difference]: Start difference. First operand 137 states and 181 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:24,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:26,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:27,418 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2021-11-19 14:57:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:57:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 96 [2021-11-19 14:57:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:27,424 INFO L225 Difference]: With dead ends: 264 [2021-11-19 14:57:27,424 INFO L226 Difference]: Without dead ends: 157 [2021-11-19 14:57:27,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:57:27,426 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 42 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:27,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 571 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 2 Unknown, 42 Unchecked, 5.3s Time] [2021-11-19 14:57:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-19 14:57:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2021-11-19 14:57:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-19 14:57:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2021-11-19 14:57:27,447 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 96 [2021-11-19 14:57:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:27,448 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2021-11-19 14:57:27,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2021-11-19 14:57:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:57:27,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:27,451 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:27,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:27,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:27,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash 747771008, now seen corresponding path program 1 times [2021-11-19 14:57:27,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:27,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673505476] [2021-11-19 14:57:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:27,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:27,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:27,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:27,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:57:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:57:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:57:30,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 14:57:32,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:32,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673505476] [2021-11-19 14:57:32,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673505476] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:32,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:32,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 14:57:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927704923] [2021-11-19 14:57:32,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:57:32,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:57:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:57:32,892 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:57:34,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:37,013 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:40,678 INFO L93 Difference]: Finished difference Result 272 states and 377 transitions. [2021-11-19 14:57:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:57:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-11-19 14:57:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:40,684 INFO L225 Difference]: With dead ends: 272 [2021-11-19 14:57:40,684 INFO L226 Difference]: Without dead ends: 155 [2021-11-19 14:57:40,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:57:40,686 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 38 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:40,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1473 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 2 Unknown, 308 Unchecked, 6.1s Time] [2021-11-19 14:57:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-19 14:57:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-19 14:57:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 106 states have internal predecessors, (124), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-19 14:57:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2021-11-19 14:57:40,707 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 96 [2021-11-19 14:57:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:40,708 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2021-11-19 14:57:40,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:57:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2021-11-19 14:57:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:57:40,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:40,711 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:40,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:40,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:40,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1945771076, now seen corresponding path program 1 times [2021-11-19 14:57:40,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:40,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719118277] [2021-11-19 14:57:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:40,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:40,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:40,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:40,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:57:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:57:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:57:42,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:57:42,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:42,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719118277] [2021-11-19 14:57:42,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719118277] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:42,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:42,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:57:42,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696749578] [2021-11-19 14:57:42,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:42,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:57:42,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:57:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:57:42,477 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:42,548 INFO L93 Difference]: Finished difference Result 276 states and 375 transitions. [2021-11-19 14:57:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:57:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 96 [2021-11-19 14:57:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:42,552 INFO L225 Difference]: With dead ends: 276 [2021-11-19 14:57:42,552 INFO L226 Difference]: Without dead ends: 155 [2021-11-19 14:57:42,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:42,554 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 34 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:42,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 481 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:57:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-19 14:57:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2021-11-19 14:57:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-19 14:57:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2021-11-19 14:57:42,594 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 96 [2021-11-19 14:57:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:42,595 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2021-11-19 14:57:42,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:57:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2021-11-19 14:57:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:57:42,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:42,600 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:42,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:42,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:42,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2000163974, now seen corresponding path program 1 times [2021-11-19 14:57:42,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:42,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137918665] [2021-11-19 14:57:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:42,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:42,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:42,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:42,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:57:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:57:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:57:44,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 14:57:44,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:44,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137918665] [2021-11-19 14:57:44,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137918665] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:44,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:44,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 14:57:44,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662403314] [2021-11-19 14:57:44,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:44,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:57:44,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:57:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:57:44,499 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:57:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:44,861 INFO L93 Difference]: Finished difference Result 275 states and 372 transitions. [2021-11-19 14:57:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:57:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-11-19 14:57:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:44,865 INFO L225 Difference]: With dead ends: 275 [2021-11-19 14:57:44,866 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 14:57:44,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:57:44,868 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 12 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:44,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1181 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:57:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 14:57:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-11-19 14:57:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-19 14:57:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2021-11-19 14:57:44,889 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 96 [2021-11-19 14:57:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:44,890 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2021-11-19 14:57:44,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:57:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2021-11-19 14:57:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:57:44,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:44,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:44,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:45,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:45,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash -892177611, now seen corresponding path program 1 times [2021-11-19 14:57:45,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:45,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282092986] [2021-11-19 14:57:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:45,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:45,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:45,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:45,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:57:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:46,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:57:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:57:46,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 14:57:46,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:46,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282092986] [2021-11-19 14:57:46,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282092986] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:46,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:46,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 14:57:46,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545106566] [2021-11-19 14:57:46,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:46,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:57:46,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:57:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:57:46,770 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 14:57:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:47,058 INFO L93 Difference]: Finished difference Result 258 states and 340 transitions. [2021-11-19 14:57:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:57:47,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2021-11-19 14:57:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:47,061 INFO L225 Difference]: With dead ends: 258 [2021-11-19 14:57:47,061 INFO L226 Difference]: Without dead ends: 147 [2021-11-19 14:57:47,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:57:47,063 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 65 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:47,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 540 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:57:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-19 14:57:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-19 14:57:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (41), 33 states have call predecessors, (41), 33 states have call successors, (41) [2021-11-19 14:57:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2021-11-19 14:57:47,078 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 98 [2021-11-19 14:57:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:47,079 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2021-11-19 14:57:47,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 14:57:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2021-11-19 14:57:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:57:47,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:47,081 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:47,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:47,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:47,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2139077398, now seen corresponding path program 1 times [2021-11-19 14:57:47,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:47,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242533610] [2021-11-19 14:57:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:47,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:47,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:47,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:57:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:57:48,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:57:48,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:57:49,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:49,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242533610] [2021-11-19 14:57:49,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242533610] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:57:49,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:57:49,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-19 14:57:49,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202851337] [2021-11-19 14:57:49,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:49,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:57:49,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:57:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:57:49,171 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-19 14:57:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:49,742 INFO L93 Difference]: Finished difference Result 252 states and 329 transitions. [2021-11-19 14:57:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:57:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 104 [2021-11-19 14:57:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:49,745 INFO L225 Difference]: With dead ends: 252 [2021-11-19 14:57:49,745 INFO L226 Difference]: Without dead ends: 144 [2021-11-19 14:57:49,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:57:49,747 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 84 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:49,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 807 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:57:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-19 14:57:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-19 14:57:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 98 states have (on average 1.163265306122449) internal successors, (114), 99 states have internal predecessors, (114), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-19 14:57:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-11-19 14:57:49,762 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 104 [2021-11-19 14:57:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:49,762 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-11-19 14:57:49,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-19 14:57:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-11-19 14:57:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:57:49,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:49,766 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:49,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:49,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:49,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1375170240, now seen corresponding path program 1 times [2021-11-19 14:57:49,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:49,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623872336] [2021-11-19 14:57:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:49,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:49,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:49,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:57:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:57:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:53,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:57:53,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 59 [2021-11-19 14:57:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:57:53,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:54,419 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-19 14:57:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 42 [2021-11-19 14:58:04,833 WARN L227 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 523 DAG size of output: 169 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:58:04,837 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-19 14:58:04,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 471 [2021-11-19 15:02:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 15:02:01,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:01,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623872336] [2021-11-19 15:02:01,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623872336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:02:01,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:02:01,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 20 [2021-11-19 15:02:01,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149597574] [2021-11-19 15:02:01,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:01,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:02:01,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:02:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:02:01,684 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-19 15:02:03,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:05,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:07,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:19,386 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:02:40,761 WARN L227 SmtUtils]: Spent 20.17s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:02:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:42,480 INFO L93 Difference]: Finished difference Result 304 states and 396 transitions. [2021-11-19 15:02:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:02:42,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2021-11-19 15:02:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:42,484 INFO L225 Difference]: With dead ends: 304 [2021-11-19 15:02:42,484 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 15:02:42,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:02:42,486 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 148 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:42,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1637 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 503 Invalid, 3 Unknown, 55 Unchecked, 9.4s Time] [2021-11-19 15:02:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 15:02:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2021-11-19 15:02:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 132 states have internal predecessors, (151), 37 states have call successors, (37), 13 states have call predecessors, (37), 14 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-11-19 15:02:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 235 transitions. [2021-11-19 15:02:42,500 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 235 transitions. Word has length 116 [2021-11-19 15:02:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:42,501 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 235 transitions. [2021-11-19 15:02:42,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-19 15:02:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 235 transitions. [2021-11-19 15:02:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 15:02:42,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:42,503 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:42,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 15:02:42,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:42,720 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 925652350, now seen corresponding path program 1 times [2021-11-19 15:02:42,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:42,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925458641] [2021-11-19 15:02:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:42,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:42,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:42,726 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:42,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:02:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 15:02:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:02:46,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:50,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:02:50,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:02:50,936 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:02:50,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:02:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:02:51,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:51,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925458641] [2021-11-19 15:02:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925458641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:51,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5934004] [2021-11-19 15:02:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:51,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:51,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:51,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:02:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:02:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 15:02:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 15:02:57,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5934004] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:02:57,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:02:57,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20, 15, 10] total 37 [2021-11-19 15:02:57,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022996221] [2021-11-19 15:02:57,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:57,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:02:57,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:57,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:02:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 15:02:57,339 INFO L87 Difference]: Start difference. First operand 182 states and 235 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 15:02:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:57,514 INFO L93 Difference]: Finished difference Result 194 states and 252 transitions. [2021-11-19 15:02:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:02:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 116 [2021-11-19 15:02:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:57,517 INFO L225 Difference]: With dead ends: 194 [2021-11-19 15:02:57,517 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 15:02:57,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 421 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 15:02:57,521 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 21 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:57,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1139 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:02:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 15:02:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-19 15:02:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 139 states have internal predecessors, (157), 38 states have call successors, (38), 14 states have call predecessors, (38), 16 states have return successors, (54), 37 states have call predecessors, (54), 37 states have call successors, (54) [2021-11-19 15:02:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 249 transitions. [2021-11-19 15:02:57,548 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 249 transitions. Word has length 116 [2021-11-19 15:02:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:57,550 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 249 transitions. [2021-11-19 15:02:57,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 15:02:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 249 transitions. [2021-11-19 15:02:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:02:57,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:57,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:57,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:57,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-19 15:02:57,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:57,964 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1015786308, now seen corresponding path program 1 times [2021-11-19 15:02:57,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:57,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262645975] [2021-11-19 15:02:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:57,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:57,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:57,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:02:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:58,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 15:02:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:03:01,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:04,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:03:04,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:03:04,678 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:03:04,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:03:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:03:04,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:04,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262645975] [2021-11-19 15:03:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262645975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:04,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368950096] [2021-11-19 15:03:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:04,825 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:04,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:04,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:03:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:10,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 15:03:10,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:03:11,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:14,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:03:14,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:03:14,848 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:03:14,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:03:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:03:14,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368950096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:14,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471569704] [2021-11-19 15:03:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:14,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:03:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:03:14,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:03:14,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 15:03:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:03:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:03:17,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:20,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:03:20,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:03:20,434 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:03:20,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:03:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:03:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471569704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:20,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:03:20,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16, 11, 16, 11] total 23 [2021-11-19 15:03:20,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81476206] [2021-11-19 15:03:20,621 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:03:20,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 15:03:20,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 15:03:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:03:20,624 INFO L87 Difference]: Start difference. First operand 191 states and 249 transitions. Second operand has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-19 15:03:22,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:24,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:26,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:28,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:33,227 INFO L93 Difference]: Finished difference Result 327 states and 420 transitions. [2021-11-19 15:03:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 15:03:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 120 [2021-11-19 15:03:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:33,230 INFO L225 Difference]: With dead ends: 327 [2021-11-19 15:03:33,230 INFO L226 Difference]: Without dead ends: 236 [2021-11-19 15:03:33,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 683 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:03:33,232 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 147 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 81 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:33,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2336 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 662 Invalid, 4 Unknown, 167 Unchecked, 10.9s Time] [2021-11-19 15:03:33,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-19 15:03:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-11-19 15:03:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 152 states have internal predecessors, (173), 41 states have call successors, (41), 16 states have call predecessors, (41), 17 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2021-11-19 15:03:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 272 transitions. [2021-11-19 15:03:33,251 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 272 transitions. Word has length 120 [2021-11-19 15:03:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:33,251 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 272 transitions. [2021-11-19 15:03:33,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-19 15:03:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 272 transitions. [2021-11-19 15:03:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:03:33,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:33,254 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:33,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:33,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:33,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:33,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:33,873 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:33,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2110590710, now seen corresponding path program 1 times [2021-11-19 15:03:33,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:33,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013097270] [2021-11-19 15:03:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:33,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:33,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:33,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:33,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d68bf79-d679-4046-9933-a1afa5996a92/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:03:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 15:03:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:03:37,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:50,256 WARN L227 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:03:50,259 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-19 15:03:50,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771