./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:46:08,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:46:08,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:46:08,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:46:08,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:46:08,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:46:08,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:46:08,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:46:08,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:46:08,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:46:08,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:46:08,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:46:08,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:46:08,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:46:08,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:46:08,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:46:08,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:46:08,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:46:08,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:46:08,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:46:08,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:46:08,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:46:08,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:46:08,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:46:08,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:46:08,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:46:08,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:46:08,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:46:08,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:46:08,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:46:08,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:46:08,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:46:08,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:46:08,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:46:08,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:46:08,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:46:08,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:46:08,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:46:08,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:46:08,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:46:08,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:46:08,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:46:08,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:46:08,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:46:08,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:46:08,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:46:08,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:46:08,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:46:08,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:46:08,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:46:08,692 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:46:08,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:46:08,693 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:46:08,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:46:08,693 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:46:08,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:46:08,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:46:08,695 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:46:08,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:46:08,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:46:08,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:46:08,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:46:08,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:46:08,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:46:08,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:46:08,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:46:08,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:46:08,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:46:08,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:46:08,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:46:08,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:08,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:46:08,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:46:08,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:46:08,703 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:46:08,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:46:08,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:46:08,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:46:08,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:46:08,705 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 [2021-11-19 14:46:09,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:46:09,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:46:09,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:46:09,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:46:09,082 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:46:09,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-19 14:46:09,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/354139f1f/0352d95d96724508bb9bad3aa940d96b/FLAGdf18ff6c1 [2021-11-19 14:46:10,267 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:46:10,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-19 14:46:10,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/354139f1f/0352d95d96724508bb9bad3aa940d96b/FLAGdf18ff6c1 [2021-11-19 14:46:10,596 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/354139f1f/0352d95d96724508bb9bad3aa940d96b [2021-11-19 14:46:10,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:46:10,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:46:10,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:10,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:46:10,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:46:10,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:10" (1/1) ... [2021-11-19 14:46:10,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c092fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:10, skipping insertion in model container [2021-11-19 14:46:10,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:10" (1/1) ... [2021-11-19 14:46:10,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:46:10,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:11,192 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-19 14:46:11,207 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-19 14:46:11,246 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:46:11,257 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:46:12,573 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,583 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,585 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,586 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,588 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,626 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,627 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,633 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:12,634 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:13,184 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:46:13,186 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:46:13,188 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:46:13,189 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:46:13,192 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:46:13,193 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:46:13,194 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:46:13,195 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:46:13,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:46:13,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:46:13,478 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:46:13,647 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:13,656 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:13,769 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:13,874 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 14:46:13,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e0a54b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:13, skipping insertion in model container [2021-11-19 14:46:13,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:13,879 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:46:13,882 INFO L158 Benchmark]: Toolchain (without parser) took 3274.99ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 64.0MB in the beginning and 84.0MB in the end (delta: -20.1MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. [2021-11-19 14:46:13,883 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 111.1MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:46:13,885 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3269.33ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 63.8MB in the beginning and 84.0MB in the end (delta: -20.3MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. [2021-11-19 14:46:13,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 111.1MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3269.33ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 63.8MB in the beginning and 84.0MB in the end (delta: -20.3MB). Peak memory consumption was 18.3MB. 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:46:16,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:46:16,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:46:16,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:46:16,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:46:16,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:46:16,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:46:16,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:46:16,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:46:16,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:46:16,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:46:16,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:46:16,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:46:16,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:46:16,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:46:16,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:46:16,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:46:16,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:46:16,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:46:16,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:46:16,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:46:16,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:46:16,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:46:16,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:46:16,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:46:16,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:46:16,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:46:16,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:46:16,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:46:16,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:46:16,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:46:16,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:46:16,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:46:16,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:46:16,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:46:16,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:46:16,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:46:16,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:46:16,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:46:16,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:46:16,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:46:16,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:46:16,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:46:16,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:46:16,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:46:16,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:46:16,975 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:46:16,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:46:16,976 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:46:16,976 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:46:16,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:46:16,977 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:46:16,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:46:16,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:46:16,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:46:16,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:46:16,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:46:16,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:46:16,981 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:46:16,981 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:46:16,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:46:16,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:46:16,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:46:16,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:46:16,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:46:16,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:46:16,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:16,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:46:16,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:46:16,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:46:16,985 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:46:16,985 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:16,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:46:16,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:46:16,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:46:16,986 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624e111eb11fc6cb53be17248f0e61e18bd8cc958dfb511134351ecf4f085f78 [2021-11-19 14:46:17,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:46:17,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:46:17,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:46:17,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:46:17,516 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:46:17,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-19 14:46:17,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/1615c4622/cd4acbf23a4145b1b11f087d4680ae22/FLAGd461b1699 [2021-11-19 14:46:18,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:46:18,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i [2021-11-19 14:46:18,935 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/1615c4622/cd4acbf23a4145b1b11f087d4680ae22/FLAGd461b1699 [2021-11-19 14:46:19,168 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/data/1615c4622/cd4acbf23a4145b1b11f087d4680ae22 [2021-11-19 14:46:19,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:46:19,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:46:19,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:19,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:46:19,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:46:19,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:19" (1/1) ... [2021-11-19 14:46:19,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c2c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:19, skipping insertion in model container [2021-11-19 14:46:19,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:19" (1/1) ... [2021-11-19 14:46:19,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:46:19,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:19,749 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-19 14:46:19,762 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-19 14:46:19,808 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:46:19,819 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:46:21,125 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,126 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,127 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,127 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,128 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,160 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,161 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,165 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,166 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,635 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:46:21,636 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:46:21,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:46:21,652 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:46:21,654 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:46:21,655 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:46:21,656 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:46:21,656 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:46:21,657 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:46:21,658 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:46:21,858 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:46:21,971 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:21,972 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,077 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:22,173 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:46:22,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:22,252 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-19 14:46:22,252 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-19 14:46:22,254 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:46:22,254 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:46:22,291 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,292 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,292 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,293 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,294 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,301 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,302 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,303 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,304 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,349 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:46:22,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:46:22,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:46:22,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:46:22,352 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:46:22,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:46:22,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:46:22,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:46:22,360 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:46:22,361 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:46:22,422 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:46:22,505 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,506 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,536 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:22,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:46:22,582 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4495,4508] [2021-11-19 14:46:22,583 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_2d6d21e6-9360-44b4-9e41-f522cb47ace0/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_u8_harness.i[4555,4568] [2021-11-19 14:46:22,585 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:46:22,585 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:46:22,643 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,644 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,644 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,645 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,645 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,651 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,652 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,653 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,653 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,687 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:46:22,687 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:46:22,688 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:46:22,689 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:46:22,690 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:46:22,690 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:46:22,691 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:46:22,691 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:46:22,692 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:46:22,692 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:46:22,713 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:46:22,812 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,813 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:46:22,861 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:23,279 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:46:23,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23 WrapperNode [2021-11-19 14:46:23,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:23,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:46:23,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:46:23,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:46:23,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,638 INFO L137 Inliner]: procedures = 713, calls = 2621, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 853 [2021-11-19 14:46:23,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:46:23,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:46:23,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:46:23,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:46:23,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:46:23,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:46:23,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:46:23,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:46:23,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (1/1) ... [2021-11-19 14:46:23,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:23,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:46:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:46:23,964 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 14:46:23,964 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 14:46:23,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:46:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 14:46:23,965 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 14:46:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:46:23,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:46:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:46:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:46:23,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:46:23,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:46:23,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:46:23,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:46:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-19 14:46:23,969 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-19 14:46:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:46:23,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:46:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 14:46:23,970 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 14:46:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:46:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 14:46:23,970 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 14:46:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:46:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:46:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:46:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-19 14:46:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-19 14:46:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:46:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:46:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-19 14:46:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-19 14:46:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:46:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:46:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:46:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 14:46:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 14:46:24,412 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:46:24,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:46:28,680 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:46:28,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:46:28,696 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:46:28,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:28 BoogieIcfgContainer [2021-11-19 14:46:28,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:46:28,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:46:28,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:46:28,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:46:28,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:46:19" (1/3) ... [2021-11-19 14:46:28,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f83871b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:28, skipping insertion in model container [2021-11-19 14:46:28,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:23" (2/3) ... [2021-11-19 14:46:28,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f83871b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:28, skipping insertion in model container [2021-11-19 14:46:28,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:28" (3/3) ... [2021-11-19 14:46:28,720 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_u8_harness.i [2021-11-19 14:46:28,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:46:28,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:46:28,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:46:28,788 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 14:46:28,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:46:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 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 14:46:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:46:28,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:28,822 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] [2021-11-19 14:46:28,822 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1965629008, now seen corresponding path program 1 times [2021-11-19 14:46:28,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:28,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531304217] [2021-11-19 14:46:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:28,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:28,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:28,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:46:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:46:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:30,076 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 14:46:30,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:30,343 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 14:46:30,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:30,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531304217] [2021-11-19 14:46:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531304217] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:30,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:30,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 14:46:30,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748375203] [2021-11-19 14:46:30,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:30,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:46:30,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:46:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:46:30,387 INFO L87 Difference]: Start difference. First operand has 131 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 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 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 14:46:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:30,436 INFO L93 Difference]: Finished difference Result 258 states and 367 transitions. [2021-11-19 14:46:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:46:30,438 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 85 [2021-11-19 14:46:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:30,450 INFO L225 Difference]: With dead ends: 258 [2021-11-19 14:46:30,450 INFO L226 Difference]: Without dead ends: 126 [2021-11-19 14:46:30,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 168 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 14:46:30,460 INFO L933 BasicCegarLoop]: 170 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, 170 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 14:46:30,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-19 14:46:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-19 14:46:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 82 states have internal predecessors, (98), 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 14:46:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2021-11-19 14:46:30,544 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 85 [2021-11-19 14:46:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:30,545 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2021-11-19 14:46:30,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 14:46:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2021-11-19 14:46:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:46:30,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:30,556 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] [2021-11-19 14:46:30,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:30,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:30,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1222792284, now seen corresponding path program 1 times [2021-11-19 14:46:30,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:30,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660075092] [2021-11-19 14:46:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:30,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:30,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:30,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:30,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:46:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:31,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:46:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:32,162 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 14:46:32,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:32,523 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 14:46:32,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:32,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660075092] [2021-11-19 14:46:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660075092] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:32,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 14:46:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454467195] [2021-11-19 14:46:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:32,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:32,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:46:32,527 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 14:46:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:32,833 INFO L93 Difference]: Finished difference Result 230 states and 309 transitions. [2021-11-19 14:46:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 85 [2021-11-19 14:46:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:32,839 INFO L225 Difference]: With dead ends: 230 [2021-11-19 14:46:32,839 INFO L226 Difference]: Without dead ends: 129 [2021-11-19 14:46:32,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 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 14:46:32,842 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 47 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 531 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 14:46:32,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 531 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:46:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-19 14:46:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-19 14:46:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 85 states have internal predecessors, (100), 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 14:46:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2021-11-19 14:46:32,865 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 85 [2021-11-19 14:46:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:32,866 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2021-11-19 14:46:32,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 14:46:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2021-11-19 14:46:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:46:32,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:32,872 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] [2021-11-19 14:46:32,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:33,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:33,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash 45758927, now seen corresponding path program 1 times [2021-11-19 14:46:33,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:33,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490597778] [2021-11-19 14:46:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:33,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:33,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:46:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:46:34,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:34,368 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 14:46:35,475 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 14:46:35,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:36,434 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 14:46:36,732 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 14:46:36,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:36,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490597778] [2021-11-19 14:46:36,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490597778] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:36,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:36,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-19 14:46:36,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960403454] [2021-11-19 14:46:36,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:36,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:46:36,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:46:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:46:36,735 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 10 states have internal predecessors, (45), 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 14:46:38,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:39,417 INFO L93 Difference]: Finished difference Result 253 states and 337 transitions. [2021-11-19 14:46:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:46:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 10 states have internal predecessors, (45), 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 91 [2021-11-19 14:46:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:39,421 INFO L225 Difference]: With dead ends: 253 [2021-11-19 14:46:39,421 INFO L226 Difference]: Without dead ends: 142 [2021-11-19 14:46:39,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 164 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 14:46:39,423 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 37 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:39,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 765 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 1 Unknown, 36 Unchecked, 2.5s Time] [2021-11-19 14:46:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-19 14:46:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-19 14:46:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 97 states have internal predecessors, (115), 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 14:46:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2021-11-19 14:46:39,450 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 91 [2021-11-19 14:46:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:39,452 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2021-11-19 14:46:39,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 10 states have internal predecessors, (45), 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 14:46:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2021-11-19 14:46:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:46:39,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:39,464 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] [2021-11-19 14:46:39,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:39,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:39,683 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash 606458705, now seen corresponding path program 1 times [2021-11-19 14:46:39,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:39,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602910862] [2021-11-19 14:46:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:39,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:39,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:39,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:39,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:46:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:40,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:40,926 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 14:46:40,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:41,153 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 14:46:41,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:41,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602910862] [2021-11-19 14:46:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602910862] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:41,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:41,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:46:41,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221254060] [2021-11-19 14:46:41,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:41,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:46:41,157 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 14:46:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:41,225 INFO L93 Difference]: Finished difference Result 256 states and 349 transitions. [2021-11-19 14:46:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 91 [2021-11-19 14:46:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:41,228 INFO L225 Difference]: With dead ends: 256 [2021-11-19 14:46:41,230 INFO L226 Difference]: Without dead ends: 148 [2021-11-19 14:46:41,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 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 14:46:41,235 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 20 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 487 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 14:46:41,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 487 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-19 14:46:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2021-11-19 14:46:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.211111111111111) internal successors, (109), 91 states have internal predecessors, (109), 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 14:46:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 180 transitions. [2021-11-19 14:46:41,264 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 180 transitions. Word has length 91 [2021-11-19 14:46:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:41,265 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 180 transitions. [2021-11-19 14:46:41,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 14:46:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 180 transitions. [2021-11-19 14:46:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:46:41,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:41,269 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] [2021-11-19 14:46:41,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:41,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:41,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:41,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1417431511, now seen corresponding path program 1 times [2021-11-19 14:46:41,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:41,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815430297] [2021-11-19 14:46:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:41,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:41,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:41,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:41,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:46:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:46:42,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:43,108 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 14:46:43,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:43,789 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 14:46:43,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:43,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815430297] [2021-11-19 14:46:43,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815430297] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:43,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:43,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 14:46:43,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249412843] [2021-11-19 14:46:43,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:43,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:43,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:43,797 INFO L87 Difference]: Start difference. First operand 136 states and 180 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (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 14:46:45,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:47,958 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 14:46:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:49,312 INFO L93 Difference]: Finished difference Result 262 states and 362 transitions. [2021-11-19 14:46:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (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 95 [2021-11-19 14:46:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:49,319 INFO L225 Difference]: With dead ends: 262 [2021-11-19 14:46:49,319 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 14:46:49,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:49,322 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 42 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:49,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 575 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 2 Unknown, 39 Unchecked, 5.3s Time] [2021-11-19 14:46:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 14:46:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2021-11-19 14:46:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 100 states have internal predecessors, (121), 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 14:46:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-19 14:46:49,342 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 95 [2021-11-19 14:46:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:49,343 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-19 14:46:49,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (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 14:46:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-19 14:46:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:46:49,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:49,345 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] [2021-11-19 14:46:49,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:49,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:49,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:49,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1619255445, now seen corresponding path program 1 times [2021-11-19 14:46:49,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:49,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122794813] [2021-11-19 14:46:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:49,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:49,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:49,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:49,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:46:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:50,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:46:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:52,400 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 14:46:52,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:54,407 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 14:46:54,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:54,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122794813] [2021-11-19 14:46:54,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122794813] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:54,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:54,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 14:46:54,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518985929] [2021-11-19 14:46:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:54,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:46:54,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:46:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:46:54,409 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 14:46:56,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:58,518 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 14:47:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:01,775 INFO L93 Difference]: Finished difference Result 270 states and 375 transitions. [2021-11-19 14:47:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:47:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 95 [2021-11-19 14:47:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:01,783 INFO L225 Difference]: With dead ends: 270 [2021-11-19 14:47:01,783 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 14:47:01,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:47:01,785 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 38 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:01,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1472 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 2 Unknown, 294 Unchecked, 5.8s Time] [2021-11-19 14:47:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 14:47:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-11-19 14:47:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 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 14:47:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 199 transitions. [2021-11-19 14:47:01,806 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 199 transitions. Word has length 95 [2021-11-19 14:47:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:01,806 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 199 transitions. [2021-11-19 14:47:01,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 14:47:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 199 transitions. [2021-11-19 14:47:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:47:01,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:01,809 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] [2021-11-19 14:47:01,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:02,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:02,023 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -268748327, now seen corresponding path program 1 times [2021-11-19 14:47:02,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:02,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786510275] [2021-11-19 14:47:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:02,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:02,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:02,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:02,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:47:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:47:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:03,168 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 14:47:03,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:03,385 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 14:47:03,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:03,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786510275] [2021-11-19 14:47:03,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786510275] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:03,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:03,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:47:03,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892917027] [2021-11-19 14:47:03,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:03,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:47:03,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:03,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:47:03,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:47:03,388 INFO L87 Difference]: Start difference. First operand 150 states and 199 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 14:47:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:03,451 INFO L93 Difference]: Finished difference Result 274 states and 373 transitions. [2021-11-19 14:47:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:47:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 95 [2021-11-19 14:47:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:03,455 INFO L225 Difference]: With dead ends: 274 [2021-11-19 14:47:03,455 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 14:47:03,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 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 14:47:03,461 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 34 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 478 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 14:47:03,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 478 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:47:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 14:47:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2021-11-19 14:47:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 101 states have internal predecessors, (116), 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 14:47:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-11-19 14:47:03,491 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 95 [2021-11-19 14:47:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:03,492 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-11-19 14:47:03,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 14:47:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-11-19 14:47:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:47:03,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:03,495 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] [2021-11-19 14:47:03,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:03,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -686144933, now seen corresponding path program 1 times [2021-11-19 14:47:03,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:03,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947172506] [2021-11-19 14:47:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:03,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:03,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:03,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:47:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:04,785 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 14:47:04,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:05,125 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 14:47:05,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:05,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947172506] [2021-11-19 14:47:05,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947172506] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:05,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:05,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 14:47:05,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936061354] [2021-11-19 14:47:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:05,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:47:05,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:47:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:47:05,127 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 14:47:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:05,463 INFO L93 Difference]: Finished difference Result 273 states and 370 transitions. [2021-11-19 14:47:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:47:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 95 [2021-11-19 14:47:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:05,466 INFO L225 Difference]: With dead ends: 273 [2021-11-19 14:47:05,467 INFO L226 Difference]: Without dead ends: 155 [2021-11-19 14:47:05,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 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 14:47:05,468 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 12 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1173 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 14:47:05,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1173 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:47:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-19 14:47:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2021-11-19 14:47:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 101 states have internal predecessors, (116), 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 14:47:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-11-19 14:47:05,484 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 95 [2021-11-19 14:47:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:05,485 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-11-19 14:47:05,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 14:47:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-11-19 14:47:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:47:05,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:05,487 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] [2021-11-19 14:47:05,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:05,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:05,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash 302836928, now seen corresponding path program 1 times [2021-11-19 14:47:05,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:05,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324709306] [2021-11-19 14:47:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:05,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:05,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:05,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:47:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:47:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:06,902 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 14:47:06,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:07,201 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 14:47:07,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:07,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324709306] [2021-11-19 14:47:07,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324709306] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:07,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:07,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 14:47:07,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130437252] [2021-11-19 14:47:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:07,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:47:07,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:47:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:47:07,204 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 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 14:47:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:07,447 INFO L93 Difference]: Finished difference Result 256 states and 338 transitions. [2021-11-19 14:47:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:47:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 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 97 [2021-11-19 14:47:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:07,450 INFO L225 Difference]: With dead ends: 256 [2021-11-19 14:47:07,450 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 14:47:07,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:47:07,451 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:07,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 538 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:47:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 14:47:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-19 14:47:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 101 states have internal predecessors, (116), 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 14:47:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 191 transitions. [2021-11-19 14:47:07,463 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 191 transitions. Word has length 97 [2021-11-19 14:47:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:07,464 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 191 transitions. [2021-11-19 14:47:07,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 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 14:47:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2021-11-19 14:47:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:47:07,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:07,466 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] [2021-11-19 14:47:07,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:07,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:07,683 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1586778645, now seen corresponding path program 1 times [2021-11-19 14:47:07,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:07,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514981830] [2021-11-19 14:47:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:07,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:07,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:07,687 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:07,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:47:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:47:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:08,999 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 14:47:08,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:09,329 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 14:47:09,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:09,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514981830] [2021-11-19 14:47:09,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514981830] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:09,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:09,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-19 14:47:09,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702105604] [2021-11-19 14:47:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:09,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:47:09,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:47:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:47:09,332 INFO L87 Difference]: Start difference. First operand 146 states and 191 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 14:47:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:09,840 INFO L93 Difference]: Finished difference Result 251 states and 328 transitions. [2021-11-19 14:47:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:47:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 103 [2021-11-19 14:47:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:09,843 INFO L225 Difference]: With dead ends: 251 [2021-11-19 14:47:09,843 INFO L226 Difference]: Without dead ends: 143 [2021-11-19 14:47:09,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 198 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 14:47:09,845 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 83 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 803 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 14:47:09,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 803 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:47:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-19 14:47:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-19 14:47:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 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 14:47:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 185 transitions. [2021-11-19 14:47:09,856 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 185 transitions. Word has length 103 [2021-11-19 14:47:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:09,857 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 185 transitions. [2021-11-19 14:47:09,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 14:47:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 185 transitions. [2021-11-19 14:47:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:47:09,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:09,859 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] [2021-11-19 14:47:09,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:10,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:10,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1536015423, now seen corresponding path program 1 times [2021-11-19 14:47:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:10,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089481486] [2021-11-19 14:47:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:10,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:10,078 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:47:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:11,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:47:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:13,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:47:13,898 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 14:47:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 91 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:47:14,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:14,951 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-19 14:47:14,952 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 129 treesize of output 1 [2021-11-19 14:47:23,838 WARN L227 SmtUtils]: Spent 8.53s 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 14:47:23,842 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-19 14:47:23,842 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 14:51:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 14:51:14,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:14,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089481486] [2021-11-19 14:51:14,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089481486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:14,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464185588] [2021-11-19 14:51:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:14,603 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:14,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:14,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:14,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:51:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:51:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:21,921 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 14:51:21,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:22,708 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 14:51:22,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1464185588] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:22,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:51:22,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 10, 10] total 32 [2021-11-19 14:51:22,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669836637] [2021-11-19 14:51:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:22,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:51:22,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:51:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:51:22,711 INFO L87 Difference]: Start difference. First operand 143 states and 185 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 14:51:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:23,019 INFO L93 Difference]: Finished difference Result 155 states and 201 transitions. [2021-11-19 14:51:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:51:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 115 [2021-11-19 14:51:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:23,022 INFO L225 Difference]: With dead ends: 155 [2021-11-19 14:51:23,022 INFO L226 Difference]: Without dead ends: 153 [2021-11-19 14:51:23,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 419 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 14:51:23,024 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 23 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:23,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1099 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:51:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-19 14:51:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-11-19 14:51:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 105 states have internal predecessors, (119), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (44), 34 states have call predecessors, (44), 34 states have call successors, (44) [2021-11-19 14:51:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2021-11-19 14:51:23,042 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 115 [2021-11-19 14:51:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:23,044 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2021-11-19 14:51:23,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 14:51:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2021-11-19 14:51:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:51:23,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:23,047 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] [2021-11-19 14:51:23,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:23,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:23,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:23,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash 39530247, now seen corresponding path program 1 times [2021-11-19 14:51:23,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:23,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414606533] [2021-11-19 14:51:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:23,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:23,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:23,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:51:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:51:24,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:27,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:51:27,593 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 14:51:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 95 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:51:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:28,678 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-19 14:51:28,678 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 129 treesize of output 1 [2021-11-19 14:51:38,358 WARN L227 SmtUtils]: Spent 9.27s 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 14:51:38,360 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-19 14:51:38,361 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 14:55:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:55:32,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:55:32,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414606533] [2021-11-19 14:55:32,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414606533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:55:32,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653235617] [2021-11-19 14:55:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:32,233 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:55:32,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:55:32,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:55:32,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:55:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:38,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 14:55:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:55:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:55:44,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:55:49,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:55:49,805 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 14:55:49,832 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 14:55:49,832 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 14:55:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 14:55:49,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653235617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:55:49,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982736523] [2021-11-19 14:55:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:49,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:49,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:49,968 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:55:49,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 14:55:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 14:55:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:55:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:55:54,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:55:57,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:55:57,596 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 14:55:57,623 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 14:55:57,624 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 14:55:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 14:55:57,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982736523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:55:57,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:55:57,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 16, 13, 16, 13] total 40 [2021-11-19 14:55:57,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063459621] [2021-11-19 14:55:57,811 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:55:57,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 14:55:57,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:55:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 14:55:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 14:55:57,814 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 40 states, 39 states have (on average 4.461538461538462) internal successors, (174), 36 states have internal predecessors, (174), 12 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-19 14:55:59,933 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 14:56:01,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:56:03,945 WARN L515 Checker$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 14:56:05,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:56:07,960 WARN L515 Checker$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 14:56:09,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:56:11,981 WARN L515 Checker$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 14:56:13,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:56:16,004 WARN L515 Checker$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 14:56:18,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:56:20,030 WARN L515 Checker$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 14:56:25,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:00,689 INFO L93 Difference]: Finished difference Result 445 states and 613 transitions. [2021-11-19 14:57:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-19 14:57:00,690 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.461538461538462) internal successors, (174), 36 states have internal predecessors, (174), 12 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) Word has length 119 [2021-11-19 14:57:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:00,693 INFO L225 Difference]: With dead ends: 445 [2021-11-19 14:57:00,693 INFO L226 Difference]: Without dead ends: 339 [2021-11-19 14:57:00,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 651 SyntacticMatches, 26 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=1148, Invalid=11508, Unknown=0, NotChecked=0, Total=12656 [2021-11-19 14:57:00,699 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 264 mSDsluCounter, 4453 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 108 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 4689 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:00,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 4689 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1783 Invalid, 12 Unknown, 659 Unchecked, 33.4s Time] [2021-11-19 14:57:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-19 14:57:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 272. [2021-11-19 14:57:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.1666666666666667) internal successors, (217), 190 states have internal predecessors, (217), 61 states have call successors, (61), 20 states have call predecessors, (61), 24 states have return successors, (96), 61 states have call predecessors, (96), 60 states have call successors, (96) [2021-11-19 14:57:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 374 transitions. [2021-11-19 14:57:00,728 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 374 transitions. Word has length 119 [2021-11-19 14:57:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:00,728 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 374 transitions. [2021-11-19 14:57:00,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.461538461538462) internal successors, (174), 36 states have internal predecessors, (174), 12 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-19 14:57:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 374 transitions. [2021-11-19 14:57:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:57:00,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:00,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:00,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:00,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:01,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:01,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:01,342 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:01,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1021478713, now seen corresponding path program 1 times [2021-11-19 14:57:01,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:01,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185576971] [2021-11-19 14:57:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:01,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:01,352 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:01,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d6d21e6-9360-44b4-9e41-f522cb47ace0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:57:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 14:57:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:57:08,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:23,577 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:57:23,581 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-19 14:57:23,581 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 128 treesize of output 771