./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8 --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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:00,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:00,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:01,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:01,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:01,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:01,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:01,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:01,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:01,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:01,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:01,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:01,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:01,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:01,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:01,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:01,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:01,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:01,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:01,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:01,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:01,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:01,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:01,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:01,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:01,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:01,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:01,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:01,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:01,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:01,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:01,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:01,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:01,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:01,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:01,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:01,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:01,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:01,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:01,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:01,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:01,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:18:01,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:01,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:01,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:01,180 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:01,181 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:01,181 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:01,181 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:18:01,181 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:01,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:01,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:18:01,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:18:01,189 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:01,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:18:01,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:18:01,190 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:18:01,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:01,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:18:01,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:01,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:01,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:01,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:01,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:01,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:01,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:01,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:01,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:01,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:01,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:01,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:01,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:01,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:01,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:18:01,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:18:01,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:01,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:01,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:01,198 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_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-07 02:18:01,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:01,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:01,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:01,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:01,526 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:01,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-07 02:18:01,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/20327d8f1/9c287204c47e48b9a11380276fbaa940/FLAGc481b0253 [2021-11-07 02:18:02,364 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:02,365 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-07 02:18:02,398 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/20327d8f1/9c287204c47e48b9a11380276fbaa940/FLAGc481b0253 [2021-11-07 02:18:02,449 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/20327d8f1/9c287204c47e48b9a11380276fbaa940 [2021-11-07 02:18:02,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:02,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:02,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:02,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:02,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:02,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:02" (1/1) ... [2021-11-07 02:18:02,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c45ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:02, skipping insertion in model container [2021-11-07 02:18:02,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:02" (1/1) ... [2021-11-07 02:18:02,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:02,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:02,906 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-07 02:18:02,912 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-07 02:18:02,936 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:18:02,941 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:18:03,869 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:18:03,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,960 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,962 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,964 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,965 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,984 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,985 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,987 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:03,988 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:04,390 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:18:04,391 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:18:04,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:18:04,404 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:18:04,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:18:04,407 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:18:04,408 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:18:04,409 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:18:04,409 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:18:04,410 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:18:04,647 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:04,648 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:04,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:04,792 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) [2021-11-07 02:18:04,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66078027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:04, skipping insertion in model container [2021-11-07 02:18:04,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:04,794 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:18:04,797 INFO L168 Benchmark]: Toolchain (without parser) took 2340.96 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 65.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:04,797 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 77.6 MB. Free memory is still 58.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:18:04,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2335.53 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 65.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:04,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 77.6 MB. Free memory is still 58.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2335.53 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 65.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2886]: 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_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8 --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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:07,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:07,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:07,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:07,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:07,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:07,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:07,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:07,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:07,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:07,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:07,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:07,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:07,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:07,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:07,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:07,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:07,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:07,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:07,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:07,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:07,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:07,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:07,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:07,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:07,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:07,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:07,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:07,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:07,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:07,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:07,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:07,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:07,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:07,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:07,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:07,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:07,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:07,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:07,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:07,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:07,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:18:07,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:07,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:07,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:07,390 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:07,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:07,391 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:07,391 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:07,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:07,392 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:07,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:07,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:07,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:07,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:07,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:07,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:07,396 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:18:07,396 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:18:07,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:07,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:07,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:07,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:07,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:18:07,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:07,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:07,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:07,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:07,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:07,399 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:18:07,399 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:07,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:07,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:07,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:07,400 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_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-07 02:18:07,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:07,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:07,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:07,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:07,819 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:07,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-07 02:18:07,896 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/ea3134fee/b995aec9a7dc436898d017b635f35225/FLAGd1819c2d8 [2021-11-07 02:18:08,766 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:08,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-07 02:18:08,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/ea3134fee/b995aec9a7dc436898d017b635f35225/FLAGd1819c2d8 [2021-11-07 02:18:09,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/data/ea3134fee/b995aec9a7dc436898d017b635f35225 [2021-11-07 02:18:09,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:09,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:09,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:09,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:09,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:09,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:09" (1/1) ... [2021-11-07 02:18:09,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff0f734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:09, skipping insertion in model container [2021-11-07 02:18:09,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:09" (1/1) ... [2021-11-07 02:18:09,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:09,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:09,735 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-07 02:18:09,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-07 02:18:09,776 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:18:09,784 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:18:10,781 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:18:10,882 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,884 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,884 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,889 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,908 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,909 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,911 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:10,911 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:18:11,311 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:18:11,313 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:18:11,314 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:18:11,316 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:18:11,317 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:18:11,318 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:18:11,319 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:18:11,320 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:18:11,321 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:18:11,526 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,527 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:11,651 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:18:11,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:11,724 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-07 02:18:11,724 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-07 02:18:11,727 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:18:11,733 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:18:11,800 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:18:11,820 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,825 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,829 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,830 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,844 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,845 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,846 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,847 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,905 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:18:11,906 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:18:11,907 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:18:11,909 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:18:11,925 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:18:11,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:18:11,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:18:11,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:18:11,929 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:18:11,930 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:18:11,985 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:11,986 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:12,044 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:18:12,075 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-07 02:18:12,076 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-07 02:18:12,077 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 02:18:12,078 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 02:18:12,153 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 02:18:12,174 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,174 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,175 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,175 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,176 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,185 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,186 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,187 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,187 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,226 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 02:18:12,227 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 02:18:12,228 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 02:18:12,229 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 02:18:12,230 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 02:18:12,231 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 02:18:12,231 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 02:18:12,232 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 02:18:12,233 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 02:18:12,233 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 02:18:12,276 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,277 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 02:18:12,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:12,760 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:18:12,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12 WrapperNode [2021-11-07 02:18:12,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:12,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:12,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:18:12,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:18:12,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:12,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:13,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:18:13,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:18:13,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:18:13,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:18:13,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:18:13,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:18:13,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:18:13,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (1/1) ... [2021-11-07 02:18:13,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:13,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:13,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:18:13,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:18:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:18:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:18:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:18:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:18:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:18:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:18:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:18:13,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:18:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:18:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:18:13,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:18:13,349 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-07 02:18:13,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:18:13,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:18:13,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:18:13,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:18:27,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:18:27,919 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-07 02:18:27,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:27 BoogieIcfgContainer [2021-11-07 02:18:27,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:18:27,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:18:27,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:18:27,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:18:27,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:18:09" (1/3) ... [2021-11-07 02:18:27,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6316d76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:27, skipping insertion in model container [2021-11-07 02:18:27,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:12" (2/3) ... [2021-11-07 02:18:27,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6316d76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:27, skipping insertion in model container [2021-11-07 02:18:27,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:27" (3/3) ... [2021-11-07 02:18:27,930 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-11-07 02:18:27,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:18:27,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:18:27,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:18:27,991 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 [2021-11-07 02:18:27,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:18:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 192 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:18:28,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:28,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:28,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1087609144, now seen corresponding path program 1 times [2021-11-07 02:18:28,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:28,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995111023] [2021-11-07 02:18:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:28,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:28,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:28,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:28,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:18:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:18:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:32,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:32,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:32,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995111023] [2021-11-07 02:18:32,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995111023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:32,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:32,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:18:32,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449116044] [2021-11-07 02:18:32,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:18:32,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:32,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:18:32,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:18:32,763 INFO L87 Difference]: Start difference. First operand has 193 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 192 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:32,797 INFO L93 Difference]: Finished difference Result 380 states and 549 transitions. [2021-11-07 02:18:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:18:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:18:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:32,813 INFO L225 Difference]: With dead ends: 380 [2021-11-07 02:18:32,816 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 02:18:32,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:18:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 02:18:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-07 02:18:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3172043010752688) internal successors, (245), 187 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-11-07 02:18:32,867 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 45 [2021-11-07 02:18:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:32,867 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-11-07 02:18:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-11-07 02:18:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:18:32,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:32,871 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:32,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:18:33,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:33,094 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash 339318222, now seen corresponding path program 1 times [2021-11-07 02:18:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:33,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451193242] [2021-11-07 02:18:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:33,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:33,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:33,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:33,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:37,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:37,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:37,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451193242] [2021-11-07 02:18:37,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451193242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:37,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:37,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:37,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486180390] [2021-11-07 02:18:37,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:37,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:37,625 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:37,727 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2021-11-07 02:18:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:18:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:37,731 INFO L225 Difference]: With dead ends: 296 [2021-11-07 02:18:37,731 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 02:18:37,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 02:18:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-07 02:18:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3118279569892473) internal successors, (244), 187 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 244 transitions. [2021-11-07 02:18:37,749 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 244 transitions. Word has length 51 [2021-11-07 02:18:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:37,749 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 244 transitions. [2021-11-07 02:18:37,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 244 transitions. [2021-11-07 02:18:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:18:37,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:37,752 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:37,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:37,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash 168473663, now seen corresponding path program 1 times [2021-11-07 02:18:37,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:37,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674793889] [2021-11-07 02:18:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:37,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:37,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:38,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:42,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:42,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:42,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674793889] [2021-11-07 02:18:42,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674793889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:42,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:42,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:18:42,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702456275] [2021-11-07 02:18:42,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:42,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:42,622 INFO L87 Difference]: Start difference. First operand 188 states and 244 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:43,204 INFO L93 Difference]: Finished difference Result 409 states and 532 transitions. [2021-11-07 02:18:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:18:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:43,208 INFO L225 Difference]: With dead ends: 409 [2021-11-07 02:18:43,208 INFO L226 Difference]: Without dead ends: 269 [2021-11-07 02:18:43,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-07 02:18:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2021-11-07 02:18:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3064516129032258) internal successors, (243), 187 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2021-11-07 02:18:43,227 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 55 [2021-11-07 02:18:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:43,228 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2021-11-07 02:18:43,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2021-11-07 02:18:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:18:43,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:43,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:43,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:43,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:43,446 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash -795727197, now seen corresponding path program 1 times [2021-11-07 02:18:43,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:43,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884455717] [2021-11-07 02:18:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:43,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:43,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:43,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:43,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:47,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:48,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:48,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:48,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884455717] [2021-11-07 02:18:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884455717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:48,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:18:48,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749036509] [2021-11-07 02:18:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:48,513 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:48,723 INFO L93 Difference]: Finished difference Result 297 states and 384 transitions. [2021-11-07 02:18:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:18:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:48,725 INFO L225 Difference]: With dead ends: 297 [2021-11-07 02:18:48,725 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 02:18:48,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:18:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 02:18:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-07 02:18:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 187 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 242 transitions. [2021-11-07 02:18:48,741 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 242 transitions. Word has length 63 [2021-11-07 02:18:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:48,742 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 242 transitions. [2021-11-07 02:18:48,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 242 transitions. [2021-11-07 02:18:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:18:48,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:48,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:48,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:48,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:48,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1514601710, now seen corresponding path program 1 times [2021-11-07 02:18:48,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:48,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140336027] [2021-11-07 02:18:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:48,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:48,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:48,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:18:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:53,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:54,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:54,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140336027] [2021-11-07 02:18:54,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140336027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:54,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:54,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 02:18:54,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255830506] [2021-11-07 02:18:54,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:54,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:54,088 INFO L87 Difference]: Start difference. First operand 188 states and 242 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:54,738 INFO L93 Difference]: Finished difference Result 384 states and 496 transitions. [2021-11-07 02:18:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:18:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:18:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:54,741 INFO L225 Difference]: With dead ends: 384 [2021-11-07 02:18:54,742 INFO L226 Difference]: Without dead ends: 259 [2021-11-07 02:18:54,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-07 02:18:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 188. [2021-11-07 02:18:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.2956989247311828) internal successors, (241), 187 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-07 02:18:54,756 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 75 [2021-11-07 02:18:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:54,757 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-07 02:18:54,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-07 02:18:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:18:54,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:54,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:54,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:54,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash 328015662, now seen corresponding path program 1 times [2021-11-07 02:18:54,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:54,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273361378] [2021-11-07 02:18:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:54,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:54,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:54,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:18:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:00,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:00,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273361378] [2021-11-07 02:19:00,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273361378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:00,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:00,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:19:00,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039877385] [2021-11-07 02:19:00,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:00,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:00,531 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:00,696 INFO L93 Difference]: Finished difference Result 419 states and 541 transitions. [2021-11-07 02:19:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:19:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:00,700 INFO L225 Difference]: With dead ends: 419 [2021-11-07 02:19:00,700 INFO L226 Difference]: Without dead ends: 309 [2021-11-07 02:19:00,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-07 02:19:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 194. [2021-11-07 02:19:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.296875) internal successors, (249), 193 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2021-11-07 02:19:00,717 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 249 transitions. Word has length 83 [2021-11-07 02:19:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:00,718 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 249 transitions. [2021-11-07 02:19:00,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 249 transitions. [2021-11-07 02:19:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:19:00,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:00,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:00,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:00,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:00,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:19:00,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2121584468, now seen corresponding path program 1 times [2021-11-07 02:19:00,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:00,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199357528] [2021-11-07 02:19:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:00,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:00,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:00,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:19:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:06,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:07,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:07,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199357528] [2021-11-07 02:19:07,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199357528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:07,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:07,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-07 02:19:07,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137513773] [2021-11-07 02:19:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:07,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:07,114 INFO L87 Difference]: Start difference. First operand 194 states and 249 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:22,431 INFO L93 Difference]: Finished difference Result 433 states and 560 transitions. [2021-11-07 02:19:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:19:22,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:22,437 INFO L225 Difference]: With dead ends: 433 [2021-11-07 02:19:22,437 INFO L226 Difference]: Without dead ends: 314 [2021-11-07 02:19:22,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:19:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-07 02:19:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 194. [2021-11-07 02:19:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.2916666666666667) internal successors, (248), 193 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 248 transitions. [2021-11-07 02:19:22,454 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 248 transitions. Word has length 83 [2021-11-07 02:19:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:22,455 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 248 transitions. [2021-11-07 02:19:22,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 248 transitions. [2021-11-07 02:19:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:19:22,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:22,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:22,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:19:22,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:22,670 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:19:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1462052946, now seen corresponding path program 1 times [2021-11-07 02:19:22,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:22,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373810215] [2021-11-07 02:19:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:22,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:22,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:22,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:19:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:27,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:19:27,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:28,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:29,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:29,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373810215] [2021-11-07 02:19:29,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373810215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:29,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:29,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-07 02:19:29,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67035240] [2021-11-07 02:19:29,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:19:29,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:19:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:19:29,031 INFO L87 Difference]: Start difference. First operand 194 states and 248 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:44,308 INFO L93 Difference]: Finished difference Result 434 states and 559 transitions. [2021-11-07 02:19:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:19:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:44,313 INFO L225 Difference]: With dead ends: 434 [2021-11-07 02:19:44,313 INFO L226 Difference]: Without dead ends: 315 [2021-11-07 02:19:44,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:19:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-07 02:19:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 196. [2021-11-07 02:19:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.2835051546391754) internal successors, (249), 195 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 249 transitions. [2021-11-07 02:19:44,328 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 249 transitions. Word has length 83 [2021-11-07 02:19:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:44,329 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 249 transitions. [2021-11-07 02:19:44,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 249 transitions. [2021-11-07 02:19:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:19:44,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:44,331 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:44,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:44,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:44,545 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:19:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1988908848, now seen corresponding path program 1 times [2021-11-07 02:19:44,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:44,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663252348] [2021-11-07 02:19:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:44,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:44,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:44,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:19:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:49,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:49,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:49,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663252348] [2021-11-07 02:19:49,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663252348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:49,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:49,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:19:49,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479695379] [2021-11-07 02:19:49,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:49,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:49,630 INFO L87 Difference]: Start difference. First operand 196 states and 249 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:49,860 INFO L93 Difference]: Finished difference Result 372 states and 471 transitions. [2021-11-07 02:19:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:49,862 INFO L225 Difference]: With dead ends: 372 [2021-11-07 02:19:49,862 INFO L226 Difference]: Without dead ends: 287 [2021-11-07 02:19:49,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-07 02:19:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200. [2021-11-07 02:19:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.2777777777777777) internal successors, (253), 199 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 253 transitions. [2021-11-07 02:19:49,879 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 253 transitions. Word has length 83 [2021-11-07 02:19:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:49,880 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 253 transitions. [2021-11-07 02:19:49,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 253 transitions. [2021-11-07 02:19:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:19:49,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:49,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:49,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:50,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:19:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash 313839270, now seen corresponding path program 1 times [2021-11-07 02:19:50,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:50,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793699701] [2021-11-07 02:19:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:50,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:50,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:50,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:50,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:19:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:55,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:55,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793699701] [2021-11-07 02:19:55,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793699701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:55,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:55,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:55,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464522864] [2021-11-07 02:19:55,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:55,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:55,340 INFO L87 Difference]: Start difference. First operand 200 states and 253 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:55,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:55,599 INFO L93 Difference]: Finished difference Result 518 states and 661 transitions. [2021-11-07 02:19:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:19:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:55,602 INFO L225 Difference]: With dead ends: 518 [2021-11-07 02:19:55,602 INFO L226 Difference]: Without dead ends: 402 [2021-11-07 02:19:55,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-07 02:19:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 224. [2021-11-07 02:19:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 222 states have (on average 1.2747747747747749) internal successors, (283), 223 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 283 transitions. [2021-11-07 02:19:55,618 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 283 transitions. Word has length 83 [2021-11-07 02:19:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:55,619 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 283 transitions. [2021-11-07 02:19:55,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 283 transitions. [2021-11-07 02:19:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:19:55,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:55,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:55,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:55,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:55,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:19:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:55,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1404165722, now seen corresponding path program 1 times [2021-11-07 02:19:55,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:55,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132378078] [2021-11-07 02:19:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:55,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:55,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:55,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:20:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:20:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:01,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:01,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:01,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132378078] [2021-11-07 02:20:01,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132378078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:01,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:01,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:20:01,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841011562] [2021-11-07 02:20:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:01,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:01,577 INFO L87 Difference]: Start difference. First operand 224 states and 283 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:02,273 INFO L93 Difference]: Finished difference Result 469 states and 589 transitions. [2021-11-07 02:20:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:20:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:20:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:02,278 INFO L225 Difference]: With dead ends: 469 [2021-11-07 02:20:02,278 INFO L226 Difference]: Without dead ends: 365 [2021-11-07 02:20:02,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:20:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-07 02:20:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 224. [2021-11-07 02:20:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 222 states have (on average 1.2702702702702702) internal successors, (282), 223 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2021-11-07 02:20:02,304 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 85 [2021-11-07 02:20:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:02,304 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2021-11-07 02:20:02,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2021-11-07 02:20:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:20:02,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:02,306 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:02,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:02,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:02,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1566996710, now seen corresponding path program 1 times [2021-11-07 02:20:02,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:02,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971700822] [2021-11-07 02:20:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:02,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:02,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:02,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:20:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:07,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:07,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:07,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:08,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:08,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971700822] [2021-11-07 02:20:08,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971700822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:08,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2083925055] [2021-11-07 02:20:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:08,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:08,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:08,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:20:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:10,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:20:10,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:20:10,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2083925055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:10,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:10,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:20:10,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213894783] [2021-11-07 02:20:10,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:10,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:20:10,706 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:10,905 INFO L93 Difference]: Finished difference Result 337 states and 419 transitions. [2021-11-07 02:20:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:20:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:10,907 INFO L225 Difference]: With dead ends: 337 [2021-11-07 02:20:10,908 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 02:20:10,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:20:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 02:20:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 226. [2021-11-07 02:20:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.2678571428571428) internal successors, (284), 225 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2021-11-07 02:20:10,933 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 89 [2021-11-07 02:20:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:10,934 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2021-11-07 02:20:10,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2021-11-07 02:20:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:20:10,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:10,936 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:10,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:11,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:11,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:11,362 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1657227408, now seen corresponding path program 1 times [2021-11-07 02:20:11,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:11,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744140331] [2021-11-07 02:20:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:11,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:11,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:11,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:11,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:20:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:20:16,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:20:17,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:17,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744140331] [2021-11-07 02:20:17,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744140331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:17,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1967947721] [2021-11-07 02:20:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:17,197 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:17,205 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:17,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:20:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:19,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:19,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1967947721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:19,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:19,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:20:19,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934700688] [2021-11-07 02:20:19,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:19,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:20:19,874 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:19,929 INFO L93 Difference]: Finished difference Result 315 states and 396 transitions. [2021-11-07 02:20:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 02:20:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:19,932 INFO L225 Difference]: With dead ends: 315 [2021-11-07 02:20:19,932 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 02:20:19,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:20:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 02:20:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-07 02:20:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.2589285714285714) internal successors, (282), 225 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2021-11-07 02:20:19,952 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 95 [2021-11-07 02:20:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:19,953 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2021-11-07 02:20:19,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2021-11-07 02:20:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:20:19,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:19,955 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:19,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:20,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:20,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:20,364 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 852316008, now seen corresponding path program 1 times [2021-11-07 02:20:20,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:20,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567069589] [2021-11-07 02:20:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:20,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:20,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:20,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:20,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:20:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:25,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:20:25,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:20:26,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:26,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567069589] [2021-11-07 02:20:26,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567069589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:26,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049159744] [2021-11-07 02:20:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:26,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:26,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:26,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:20:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:28,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:20:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049159744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:29,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:29,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:20:29,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975029759] [2021-11-07 02:20:29,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:29,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:29,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:29,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:20:29,071 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:29,286 INFO L93 Difference]: Finished difference Result 321 states and 403 transitions. [2021-11-07 02:20:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 02:20:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:29,289 INFO L225 Difference]: With dead ends: 321 [2021-11-07 02:20:29,289 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 02:20:29,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:20:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 02:20:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-11-07 02:20:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 1.2521739130434784) internal successors, (288), 231 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 288 transitions. [2021-11-07 02:20:29,309 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 288 transitions. Word has length 96 [2021-11-07 02:20:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:29,310 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 288 transitions. [2021-11-07 02:20:29,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 288 transitions. [2021-11-07 02:20:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:20:29,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:29,312 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:29,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:29,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:29,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:29,734 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:29,734 INFO L85 PathProgramCache]: Analyzing trace with hash 566374956, now seen corresponding path program 1 times [2021-11-07 02:20:29,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:29,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136090846] [2021-11-07 02:20:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:29,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:29,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:29,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:29,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:20:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:34,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:20:35,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:20:35,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:35,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136090846] [2021-11-07 02:20:35,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136090846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:35,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970887243] [2021-11-07 02:20:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:35,678 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:35,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:35,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:35,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:20:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:20:40,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:20:41,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [970887243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:41,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753778865] [2021-11-07 02:20:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:41,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:20:41,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:20:41,260 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:20:41,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_193b9b0a-a11c-4c57-b6be-6aed86bc37cd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 02:20:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:20:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 02:20:45,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:57,514 WARN L207 SmtUtils]: Spent 11.50 s on a formula simplification. DAG size of input: 534 DAG size of output: 280 [2021-11-07 02:20:57,519 INFO L354 Elim1Store]: treesize reduction 895, result has 45.2 percent of original size [2021-11-07 02:20:57,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 773