./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:38:39,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:38:39,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:38:39,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:38:39,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:38:39,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:38:39,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:38:39,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:38:39,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:38:39,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:38:39,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:38:39,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:38:39,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:38:39,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:38:39,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:38:39,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:38:39,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:38:39,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:38:39,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:38:39,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:38:39,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:38:39,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:38:39,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:38:39,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:38:39,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:38:39,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:38:39,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:38:39,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:38:39,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:38:39,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:38:39,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:38:39,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:38:39,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:38:39,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:38:39,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:38:39,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:38:39,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:38:39,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:38:39,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:38:39,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:38:39,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:38:39,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:38:39,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:38:39,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:38:39,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:38:39,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:38:39,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:38:39,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:38:39,219 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:38:39,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:38:39,228 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:38:39,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:38:39,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:38:39,228 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:38:39,229 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:38:39,229 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:38:39,229 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:38:39,229 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:38:39,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:38:39,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:38:39,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:38:39,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:38:39,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:38:39,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:38:39,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:38:39,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:38:39,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:38:39,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:38:39,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:38:39,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:38:39,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:38:39,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:38:39,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:38:39,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:38:39,234 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:38:39,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:38:39,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:38:39,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:38:39,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:38:39,235 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-11-13 02:38:39,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:38:39,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:38:39,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:38:39,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:38:39,682 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:38:39,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-13 02:38:39,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/126e219f1/951b298f94144bf598be56fd05aa267b/FLAG403367a34 [2021-11-13 02:38:40,964 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:38:40,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-13 02:38:41,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/126e219f1/951b298f94144bf598be56fd05aa267b/FLAG403367a34 [2021-11-13 02:38:41,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/126e219f1/951b298f94144bf598be56fd05aa267b [2021-11-13 02:38:41,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:38:41,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:38:41,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:38:41,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:38:41,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:38:41,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:38:41" (1/1) ... [2021-11-13 02:38:41,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a139dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:41, skipping insertion in model container [2021-11-13 02:38:41,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:38:41" (1/1) ... [2021-11-13 02:38:41,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:38:41,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:38:41,818 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-13 02:38:41,830 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-13 02:38:41,868 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:38:41,879 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:38:43,351 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,352 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,353 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,355 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,357 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,391 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,399 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,403 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,404 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:43,996 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:38:43,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:38:43,999 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:38:44,001 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:38:44,003 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:38:44,004 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:38:44,005 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:38:44,006 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:38:44,007 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:38:44,008 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:38:44,258 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:38:44,485 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:44,486 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:44,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:38:44,700 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) [2021-11-13 02:38:44,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c92e224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:44, skipping insertion in model container [2021-11-13 02:38:44,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:38:44,704 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:38:44,707 INFO L158 Benchmark]: Toolchain (without parser) took 3449.73ms. Allocated memory is still 115.3MB. Free memory was 88.3MB in the beginning and 67.8MB in the end (delta: 20.5MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. [2021-11-13 02:38:44,708 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 79.7MB. Free memory was 57.7MB in the beginning and 57.7MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:38:44,709 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3442.96ms. Allocated memory is still 115.3MB. Free memory was 88.3MB in the beginning and 67.8MB in the end (delta: 20.5MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. [2021-11-13 02:38:44,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 79.7MB. Free memory was 57.7MB in the beginning and 57.7MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3442.96ms. Allocated memory is still 115.3MB. Free memory was 88.3MB in the beginning and 67.8MB in the end (delta: 20.5MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:38:47,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:38:47,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:38:47,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:38:47,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:38:47,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:38:47,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:38:47,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:38:47,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:38:47,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:38:47,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:38:47,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:38:47,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:38:47,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:38:47,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:38:47,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:38:47,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:38:47,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:38:47,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:38:47,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:38:47,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:38:47,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:38:47,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:38:47,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:38:47,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:38:47,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:38:47,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:38:47,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:38:47,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:38:47,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:38:47,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:38:47,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:38:47,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:38:47,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:38:47,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:38:47,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:38:47,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:38:47,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:38:47,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:38:47,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:38:47,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:38:47,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:38:47,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:38:47,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:38:47,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:38:47,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:38:47,688 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:38:47,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:38:47,689 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:38:47,689 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:38:47,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:38:47,690 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:38:47,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:38:47,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:38:47,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:38:47,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:38:47,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:38:47,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:38:47,692 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:38:47,693 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:38:47,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:38:47,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:38:47,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:38:47,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:38:47,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:38:47,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:38:47,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:38:47,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:38:47,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:38:47,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:38:47,696 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:38:47,696 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:38:47,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:38:47,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:38:47,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:38:47,698 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e59944759baac4a78b3b5460ff6f3a8abaec03123fb9537d86aeca785269fb41 [2021-11-13 02:38:48,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:38:48,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:38:48,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:38:48,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:38:48,213 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:38:48,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-13 02:38:48,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/4e3fd321f/58bdf64ef89349a0aecb033aae5bf26b/FLAG3628540d7 [2021-11-13 02:38:49,489 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:38:49,490 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i [2021-11-13 02:38:49,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/4e3fd321f/58bdf64ef89349a0aecb033aae5bf26b/FLAG3628540d7 [2021-11-13 02:38:49,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/data/4e3fd321f/58bdf64ef89349a0aecb033aae5bf26b [2021-11-13 02:38:49,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:38:49,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:38:49,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:38:49,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:38:49,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:38:49,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:38:49" (1/1) ... [2021-11-13 02:38:49,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4f8ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:49, skipping insertion in model container [2021-11-13 02:38:49,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:38:49" (1/1) ... [2021-11-13 02:38:49,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:38:49,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:38:50,409 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-13 02:38:50,422 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-13 02:38:50,456 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:38:50,465 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:38:51,822 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,823 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,823 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,825 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,847 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,848 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,851 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:51,852 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:52,491 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:38:52,493 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:38:52,494 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:38:52,496 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:38:52,498 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:38:52,500 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:38:52,501 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:38:52,502 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:38:52,503 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:38:52,504 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:38:52,732 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:38:52,874 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:52,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:52,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:38:53,084 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:38:53,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:38:53,184 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-13 02:38:53,184 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-13 02:38:53,188 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:38:53,191 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:38:53,266 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,277 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,278 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,279 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,280 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,289 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,297 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,302 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,302 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,386 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:38:53,387 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:38:53,393 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:38:53,395 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:38:53,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:38:53,401 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:38:53,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:38:53,407 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:38:53,408 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:38:53,410 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:38:53,452 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:38:53,556 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:38:53,662 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:38:53,688 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4497,4510] [2021-11-13 02:38:53,691 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_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be16_harness.i[4557,4570] [2021-11-13 02:38:53,697 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:38:53,699 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:38:53,783 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,784 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,784 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,785 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,786 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,794 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,794 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,795 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,796 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:53,840 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:38:53,841 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:38:53,842 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:38:53,844 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:38:53,846 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:38:53,847 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:38:53,847 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:38:53,848 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:38:53,849 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:38:53,850 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:38:53,883 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:38:54,005 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:54,008 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:38:54,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:38:54,499 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:38:54,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54 WrapperNode [2021-11-13 02:38:54,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:38:54,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:38:54,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:38:54,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:38:54,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:54,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:54,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:38:54,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:38:54,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:38:54,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:38:54,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:54,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:54,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:54,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:54,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:55,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:55,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:55,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:38:55,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:38:55,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:38:55,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:38:55,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (1/1) ... [2021-11-13 02:38:55,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:38:55,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:38:55,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:38:55,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:38:55,156 INFO L130 BoogieDeclarations]: Found specification of procedure htons [2021-11-13 02:38:55,157 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-13 02:38:55,157 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-13 02:38:55,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:38:55,157 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-13 02:38:55,158 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-13 02:38:55,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:38:55,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:38:55,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 02:38:55,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:38:55,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:38:55,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:38:55,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:38:55,159 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-13 02:38:55,160 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-13 02:38:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:38:55,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:38:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 02:38:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 02:38:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:38:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-13 02:38:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-13 02:38:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:38:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 02:38:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:38:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:38:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-13 02:38:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-13 02:38:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:38:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:38:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-13 02:38:55,163 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-13 02:38:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:38:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:38:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 02:38:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:38:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-13 02:38:55,165 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-13 02:39:11,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:39:11,096 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:39:11,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:39:11 BoogieIcfgContainer [2021-11-13 02:39:11,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:39:11,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:39:11,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:39:11,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:39:11,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:38:49" (1/3) ... [2021-11-13 02:39:11,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd124c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:39:11, skipping insertion in model container [2021-11-13 02:39:11,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:38:54" (2/3) ... [2021-11-13 02:39:11,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd124c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:39:11, skipping insertion in model container [2021-11-13 02:39:11,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:39:11" (3/3) ... [2021-11-13 02:39:11,109 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be16_harness.i [2021-11-13 02:39:11,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:39:11,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:39:11,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:39:11,184 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 [2021-11-13 02:39:11,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:39:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-13 02:39:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 02:39:11,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:11,224 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:11,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1408968499, now seen corresponding path program 1 times [2021-11-13 02:39:11,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:11,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870230545] [2021-11-13 02:39:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:11,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:11,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:11,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:11,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:39:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:39:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 02:39:17,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 02:39:17,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:17,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870230545] [2021-11-13 02:39:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870230545] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:17,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:17,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-13 02:39:17,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936605968] [2021-11-13 02:39:17,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:17,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:39:17,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:39:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:39:18,032 INFO L87 Difference]: Start difference. First operand has 132 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 87 states have internal predecessors, (106), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:39:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:18,123 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-11-13 02:39:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:39:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-13 02:39:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:18,144 INFO L225 Difference]: With dead ends: 260 [2021-11-13 02:39:18,145 INFO L226 Difference]: Without dead ends: 127 [2021-11-13 02:39:18,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:39:18,162 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:18,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 7.55ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:39:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-13 02:39:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-13 02:39:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-13 02:39:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2021-11-13 02:39:18,237 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 86 [2021-11-13 02:39:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:18,238 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2021-11-13 02:39:18,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:39:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2021-11-13 02:39:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 02:39:18,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:18,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:18,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:18,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:18,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1559261231, now seen corresponding path program 1 times [2021-11-13 02:39:18,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:18,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753299764] [2021-11-13 02:39:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:18,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:18,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:18,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:18,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:39:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:39:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:39:24,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:39:25,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:25,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753299764] [2021-11-13 02:39:25,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753299764] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:25,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:25,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 02:39:25,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640360577] [2021-11-13 02:39:25,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:25,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:25,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:39:25,103 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:39:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:25,507 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-11-13 02:39:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:39:25,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 86 [2021-11-13 02:39:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:25,516 INFO L225 Difference]: With dead ends: 232 [2021-11-13 02:39:25,517 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 02:39:25,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:39:25,523 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 48 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 308.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.91ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:25,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 534 Invalid, 57 Unknown, 0 Unchecked, 7.74ms Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 365.91ms Time] [2021-11-13 02:39:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 02:39:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 02:39:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 34 states have call successors, (34), 10 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-13 02:39:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2021-11-13 02:39:25,562 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 86 [2021-11-13 02:39:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:25,564 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2021-11-13 02:39:25,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:39:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2021-11-13 02:39:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 02:39:25,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:25,573 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:25,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:25,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:25,791 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -112396410, now seen corresponding path program 1 times [2021-11-13 02:39:25,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:25,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975212088] [2021-11-13 02:39:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:25,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:25,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:25,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:39:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:30,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:39:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:31,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 02:39:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:39:32,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:33,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-13 02:39:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:39:34,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:34,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975212088] [2021-11-13 02:39:34,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975212088] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:34,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:34,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-13 02:39:34,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70802149] [2021-11-13 02:39:34,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:39:34,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:39:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:39:34,055 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 02:39:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:34,406 INFO L93 Difference]: Finished difference Result 255 states and 339 transitions. [2021-11-13 02:39:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:39:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-11-13 02:39:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:34,411 INFO L225 Difference]: With dead ends: 255 [2021-11-13 02:39:34,411 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 02:39:34,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:39:34,418 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 23 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.63ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 219.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:34,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1046 Invalid, 115 Unknown, 0 Unchecked, 9.63ms Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 87 Unchecked, 219.45ms Time] [2021-11-13 02:39:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 02:39:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-13 02:39:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 98 states have internal predecessors, (116), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-13 02:39:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 188 transitions. [2021-11-13 02:39:34,456 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 188 transitions. Word has length 92 [2021-11-13 02:39:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:34,457 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 188 transitions. [2021-11-13 02:39:34,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 02:39:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 188 transitions. [2021-11-13 02:39:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 02:39:34,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:34,460 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:34,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:34,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:34,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash 89427524, now seen corresponding path program 1 times [2021-11-13 02:39:34,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:34,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006097856] [2021-11-13 02:39:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:34,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:34,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:34,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:34,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:39:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:39,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:39:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 02:39:40,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:39:40,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:40,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006097856] [2021-11-13 02:39:40,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006097856] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:40,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:40,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 02:39:40,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545379311] [2021-11-13 02:39:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:40,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:39:40,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:39:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:39:40,531 INFO L87 Difference]: Start difference. First operand 143 states and 188 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:39:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:40,634 INFO L93 Difference]: Finished difference Result 258 states and 351 transitions. [2021-11-13 02:39:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:39:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2021-11-13 02:39:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:40,639 INFO L225 Difference]: With dead ends: 258 [2021-11-13 02:39:40,639 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 02:39:40,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:39:40,641 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 20 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:40,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 490 Invalid, 16 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 61.40ms Time] [2021-11-13 02:39:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 02:39:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2021-11-13 02:39:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-13 02:39:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 181 transitions. [2021-11-13 02:39:40,663 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 181 transitions. Word has length 92 [2021-11-13 02:39:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:40,664 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 181 transitions. [2021-11-13 02:39:40,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:39:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 181 transitions. [2021-11-13 02:39:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 02:39:40,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:40,667 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:40,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:40,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:40,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1213803650, now seen corresponding path program 1 times [2021-11-13 02:39:40,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:40,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183345911] [2021-11-13 02:39:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:40,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:40,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:40,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:40,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:39:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:39:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 02:39:47,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:39:47,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:47,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183345911] [2021-11-13 02:39:47,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183345911] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:47,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:47,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-13 02:39:47,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001345702] [2021-11-13 02:39:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:48,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:48,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:48,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:39:48,002 INFO L87 Difference]: Start difference. First operand 137 states and 181 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:39:50,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:52,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:54,081 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2021-11-13 02:39:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:39:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 96 [2021-11-13 02:39:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:54,088 INFO L225 Difference]: With dead ends: 264 [2021-11-13 02:39:54,088 INFO L226 Difference]: Without dead ends: 157 [2021-11-13 02:39:54,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:39:54,090 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 42 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5598.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 5870.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:54,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 571 Invalid, 130 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 2 Unknown, 42 Unchecked, 5870.65ms Time] [2021-11-13 02:39:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-13 02:39:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2021-11-13 02:39:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-13 02:39:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2021-11-13 02:39:54,112 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 96 [2021-11-13 02:39:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:54,113 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2021-11-13 02:39:54,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:39:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2021-11-13 02:39:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 02:39:54,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:54,116 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:54,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:54,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:54,325 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash 747771008, now seen corresponding path program 1 times [2021-11-13 02:39:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:54,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223481872] [2021-11-13 02:39:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:54,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:54,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:54,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:39:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:39:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:01,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 02:40:04,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:04,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223481872] [2021-11-13 02:40:04,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223481872] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:04,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:04,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-13 02:40:04,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846051037] [2021-11-13 02:40:04,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:04,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:40:04,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:04,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:40:04,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:40:04,592 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:40:06,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:08,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:13,785 INFO L93 Difference]: Finished difference Result 272 states and 377 transitions. [2021-11-13 02:40:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:40:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-11-13 02:40:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:13,792 INFO L225 Difference]: With dead ends: 272 [2021-11-13 02:40:13,792 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 02:40:13,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:40:13,795 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 38 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6852.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.20ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 7198.28ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:13,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1473 Invalid, 546 Unknown, 0 Unchecked, 10.20ms Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 2 Unknown, 308 Unchecked, 7198.28ms Time] [2021-11-13 02:40:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 02:40:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-13 02:40:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 106 states have internal predecessors, (124), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-13 02:40:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2021-11-13 02:40:13,813 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 96 [2021-11-13 02:40:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:13,814 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2021-11-13 02:40:13,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:40:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2021-11-13 02:40:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 02:40:13,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:13,817 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:13,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:14,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:14,031 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1945771076, now seen corresponding path program 1 times [2021-11-13 02:40:14,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:14,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168806416] [2021-11-13 02:40:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:14,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:14,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:14,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:14,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:40:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:40:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 02:40:19,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:40:19,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:19,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168806416] [2021-11-13 02:40:19,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168806416] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:19,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:19,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 02:40:19,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021647651] [2021-11-13 02:40:19,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:19,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:40:19,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:40:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:40:19,685 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:19,794 INFO L93 Difference]: Finished difference Result 276 states and 375 transitions. [2021-11-13 02:40:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:40:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 96 [2021-11-13 02:40:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:19,797 INFO L225 Difference]: With dead ends: 276 [2021-11-13 02:40:19,798 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 02:40:19,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:40:19,800 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 34 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:19,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 481 Invalid, 13 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 75.92ms Time] [2021-11-13 02:40:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 02:40:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2021-11-13 02:40:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-13 02:40:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2021-11-13 02:40:19,816 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 96 [2021-11-13 02:40:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:19,816 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2021-11-13 02:40:19,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2021-11-13 02:40:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 02:40:19,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:19,819 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:19,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:20,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:20,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2000163974, now seen corresponding path program 1 times [2021-11-13 02:40:20,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:20,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894103343] [2021-11-13 02:40:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:20,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:20,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:20,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:40:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:40:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:40:25,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 02:40:26,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:26,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894103343] [2021-11-13 02:40:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894103343] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:26,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:26,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-13 02:40:26,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197219955] [2021-11-13 02:40:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:40:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:40:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:40:26,081 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:40:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:26,678 INFO L93 Difference]: Finished difference Result 275 states and 372 transitions. [2021-11-13 02:40:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:40:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 96 [2021-11-13 02:40:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:26,692 INFO L225 Difference]: With dead ends: 275 [2021-11-13 02:40:26,693 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 02:40:26,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:40:26,695 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 12 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 444.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 487.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:26,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1181 Invalid, 142 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 487.70ms Time] [2021-11-13 02:40:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 02:40:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-11-13 02:40:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (42), 33 states have call predecessors, (42), 33 states have call successors, (42) [2021-11-13 02:40:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2021-11-13 02:40:26,711 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 96 [2021-11-13 02:40:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:26,712 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2021-11-13 02:40:26,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:40:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2021-11-13 02:40:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 02:40:26,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:26,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:26,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:26,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:26,941 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash -892177611, now seen corresponding path program 1 times [2021-11-13 02:40:26,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:26,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738742581] [2021-11-13 02:40:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:26,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:26,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:26,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:26,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:40:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:40:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:40:32,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:40:33,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:33,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738742581] [2021-11-13 02:40:33,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738742581] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:33,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:33,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 02:40:33,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232117052] [2021-11-13 02:40:33,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:33,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:40:33,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:40:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:40:33,023 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 02:40:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:33,363 INFO L93 Difference]: Finished difference Result 258 states and 340 transitions. [2021-11-13 02:40:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 98 [2021-11-13 02:40:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:33,366 INFO L225 Difference]: With dead ends: 258 [2021-11-13 02:40:33,366 INFO L226 Difference]: Without dead ends: 147 [2021-11-13 02:40:33,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:40:33,368 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 65 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:33,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 540 Invalid, 68 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 296.40ms Time] [2021-11-13 02:40:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-13 02:40:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-13 02:40:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 100 states have (on average 1.17) internal successors, (117), 102 states have internal predecessors, (117), 34 states have call successors, (34), 11 states have call predecessors, (34), 12 states have return successors, (41), 33 states have call predecessors, (41), 33 states have call successors, (41) [2021-11-13 02:40:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2021-11-13 02:40:33,383 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 98 [2021-11-13 02:40:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:33,384 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2021-11-13 02:40:33,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 02:40:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2021-11-13 02:40:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 02:40:33,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:33,386 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:33,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:33,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:33,601 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2139077398, now seen corresponding path program 1 times [2021-11-13 02:40:33,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:33,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655208411] [2021-11-13 02:40:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:33,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:33,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:33,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:33,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:40:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1908 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:40:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:40:39,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 02:40:39,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:39,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655208411] [2021-11-13 02:40:39,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655208411] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:39,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-13 02:40:39,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737446053] [2021-11-13 02:40:39,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:39,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:40:39,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:39,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:40:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:40:39,713 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 02:40:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:40,445 INFO L93 Difference]: Finished difference Result 252 states and 329 transitions. [2021-11-13 02:40:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:40:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 104 [2021-11-13 02:40:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:40,447 INFO L225 Difference]: With dead ends: 252 [2021-11-13 02:40:40,448 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 02:40:40,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:40:40,449 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 84 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 568.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 654.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:40,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 807 Invalid, 114 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [40 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 654.92ms Time] [2021-11-13 02:40:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 02:40:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-13 02:40:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 98 states have (on average 1.163265306122449) internal successors, (114), 99 states have internal predecessors, (114), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-13 02:40:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2021-11-13 02:40:40,462 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 104 [2021-11-13 02:40:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:40,462 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2021-11-13 02:40:40,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 02:40:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2021-11-13 02:40:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 02:40:40,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:40,466 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:40,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:40,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:40,693 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1375170240, now seen corresponding path program 1 times [2021-11-13 02:40:40,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:40,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034687603] [2021-11-13 02:40:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:40,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:40,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:40,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:40,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:40:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:45,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:40:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:48,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:40:48,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 59 [2021-11-13 02:40:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:40:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:49,746 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-13 02:40:49,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 42 [2021-11-13 02:41:01,210 WARN L227 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 523 DAG size of output: 169 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:41:01,213 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-13 02:41:01,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 471 [2021-11-13 02:45:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-13 02:45:43,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:45:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034687603] [2021-11-13 02:45:43,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034687603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:45:43,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:45:43,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 20 [2021-11-13 02:45:43,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801421161] [2021-11-13 02:45:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:45:43,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:45:43,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:45:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:45:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:45:43,538 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-13 02:45:45,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:47,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:49,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:45:55,955 INFO L93 Difference]: Finished difference Result 304 states and 396 transitions. [2021-11-13 02:45:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:45:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2021-11-13 02:45:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:45:55,959 INFO L225 Difference]: With dead ends: 304 [2021-11-13 02:45:55,959 INFO L226 Difference]: Without dead ends: 207 [2021-11-13 02:45:55,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:45:55,961 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 148 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9885.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.40ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 10423.63ms IncrementalHoareTripleChecker+Time [2021-11-13 02:45:55,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1637 Invalid, 631 Unknown, 0 Unchecked, 9.40ms Time], IncrementalHoareTripleChecker [70 Valid, 503 Invalid, 3 Unknown, 55 Unchecked, 10423.63ms Time] [2021-11-13 02:45:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-13 02:45:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2021-11-13 02:45:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 132 states have internal predecessors, (151), 37 states have call successors, (37), 13 states have call predecessors, (37), 14 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-11-13 02:45:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 235 transitions. [2021-11-13 02:45:55,979 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 235 transitions. Word has length 116 [2021-11-13 02:45:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:45:55,980 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 235 transitions. [2021-11-13 02:45:55,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 6 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-13 02:45:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 235 transitions. [2021-11-13 02:45:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 02:45:55,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:45:55,983 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:45:56,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:56,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:45:56,197 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:45:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:45:56,198 INFO L85 PathProgramCache]: Analyzing trace with hash 925652350, now seen corresponding path program 1 times [2021-11-13 02:45:56,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:45:56,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331407775] [2021-11-13 02:45:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:45:56,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:45:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:45:56,205 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:45:56,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:46:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 02:46:00,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:46:04,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:10,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:46:10,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-13 02:46:10,639 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 02:46:10,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-13 02:46:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 02:46:10,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:46:10,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331407775] [2021-11-13 02:46:10,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331407775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:46:10,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1529400632] [2021-11-13 02:46:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:10,830 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:46:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:46:10,831 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:46:10,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:46:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:46:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-13 02:46:21,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-13 02:46:22,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1529400632] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:46:22,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:46:22,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20, 15, 10] total 37 [2021-11-13 02:46:22,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409989387] [2021-11-13 02:46:22,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:46:22,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:46:22,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:46:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:46:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:46:22,481 INFO L87 Difference]: Start difference. First operand 182 states and 235 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 02:46:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:46:22,870 INFO L93 Difference]: Finished difference Result 194 states and 252 transitions. [2021-11-13 02:46:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:46:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 116 [2021-11-13 02:46:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:46:22,873 INFO L225 Difference]: With dead ends: 194 [2021-11-13 02:46:22,873 INFO L226 Difference]: Without dead ends: 192 [2021-11-13 02:46:22,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 421 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 02:46:22,875 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 21 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:46:22,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1139 Invalid, 55 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 174.58ms Time] [2021-11-13 02:46:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-13 02:46:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-13 02:46:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 139 states have internal predecessors, (157), 38 states have call successors, (38), 14 states have call predecessors, (38), 16 states have return successors, (54), 37 states have call predecessors, (54), 37 states have call successors, (54) [2021-11-13 02:46:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 249 transitions. [2021-11-13 02:46:22,921 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 249 transitions. Word has length 116 [2021-11-13 02:46:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:46:22,922 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 249 transitions. [2021-11-13 02:46:22,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 02:46:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 249 transitions. [2021-11-13 02:46:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:46:22,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:46:22,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:46:22,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:23,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:23,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:46:23,342 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:46:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:46:23,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1015786308, now seen corresponding path program 1 times [2021-11-13 02:46:23,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:46:23,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953493051] [2021-11-13 02:46:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:23,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:46:23,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:46:23,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:46:23,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:46:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1943 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 02:46:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:46:30,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:35,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:46:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-13 02:46:35,473 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 02:46:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-13 02:46:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 02:46:35,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:46:35,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953493051] [2021-11-13 02:46:35,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953493051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:46:35,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188068315] [2021-11-13 02:46:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:46:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:46:35,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:46:35,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:46:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1943 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 02:46:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:46:46,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:50,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:46:50,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-13 02:46:50,461 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 02:46:50,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-13 02:46:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 02:46:50,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188068315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:46:50,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065991379] [2021-11-13 02:46:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:50,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:46:50,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:46:50,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:46:50,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 02:46:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:52,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1943 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:46:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:46:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:57,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:46:57,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-13 02:46:57,783 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-13 02:46:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-13 02:46:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 02:46:57,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065991379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:46:57,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:46:57,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16, 11, 16, 11] total 23 [2021-11-13 02:46:57,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098210343] [2021-11-13 02:46:57,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:46:57,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 02:46:57,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:46:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 02:46:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:46:57,969 INFO L87 Difference]: Start difference. First operand 191 states and 249 transitions. Second operand has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 02:47:00,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:02,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:04,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:06,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:13,175 INFO L93 Difference]: Finished difference Result 327 states and 420 transitions. [2021-11-13 02:47:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 02:47:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 120 [2021-11-13 02:47:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:13,179 INFO L225 Difference]: With dead ends: 327 [2021-11-13 02:47:13,179 INFO L226 Difference]: Without dead ends: 236 [2021-11-13 02:47:13,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 683 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 02:47:13,181 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 147 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 81 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11956.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.26ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 12487.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:13,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2336 Invalid, 914 Unknown, 0 Unchecked, 12.26ms Time], IncrementalHoareTripleChecker [81 Valid, 662 Invalid, 4 Unknown, 167 Unchecked, 12487.44ms Time] [2021-11-13 02:47:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-13 02:47:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-11-13 02:47:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 152 states have internal predecessors, (173), 41 states have call successors, (41), 16 states have call predecessors, (41), 17 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2021-11-13 02:47:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 272 transitions. [2021-11-13 02:47:13,203 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 272 transitions. Word has length 120 [2021-11-13 02:47:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:13,204 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 272 transitions. [2021-11-13 02:47:13,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 7 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 02:47:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 272 transitions. [2021-11-13 02:47:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:47:13,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:13,207 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:13,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-13 02:47:13,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:13,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:13,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:47:13,823 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2110590710, now seen corresponding path program 1 times [2021-11-13 02:47:13,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:13,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975441347] [2021-11-13 02:47:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:13,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:13,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:13,831 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:13,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2ca4deb-d540-4afc-a848-c0c30c3e3f90/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:47:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1941 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:47:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:47:22,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:47:39,371 WARN L227 SmtUtils]: Spent 13.49s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:47:39,374 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-13 02:47:39,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771