./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/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_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/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_50aac07c-0ed4-47a5-9288-515a4f27cf20/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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:55,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:55,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:55,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:55,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:55,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:55,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:55,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:55,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:55,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:55,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:55,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:55,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:55,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:55,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:55,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:55,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:55,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:55,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:55,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:55,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:55,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:55,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:55,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:55,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:56,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:56,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:56,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:56,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:56,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:56,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:56,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:56,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:56,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:56,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:56,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:56,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:56,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:56,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:56,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:56,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:56,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:50:56,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:56,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:56,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:56,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:56,043 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:56,044 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:56,044 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:56,044 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:50:56,045 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:56,045 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:56,046 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:50:56,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:50:56,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:56,047 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:50:56,047 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:50:56,048 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:50:56,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:56,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:50:56,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:56,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:56,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:56,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:56,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:56,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:56,052 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:56,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:56,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:56,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:56,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:56,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:56,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:56,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:56,054 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:50:56,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:50:56,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:56,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:56,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:56,055 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-11-12 22:50:56,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:56,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:56,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:56,396 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:56,397 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:56,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-12 22:50:56,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/37ecae6be/5149840364d8452b8fce2f862777ff72/FLAGd4428f8c5 [2021-11-12 22:50:57,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:57,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-12 22:50:57,295 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/37ecae6be/5149840364d8452b8fce2f862777ff72/FLAGd4428f8c5 [2021-11-12 22:50:57,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/37ecae6be/5149840364d8452b8fce2f862777ff72 [2021-11-12 22:50:57,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:57,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:57,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:57,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:57,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:57,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:57" (1/1) ... [2021-11-12 22:50:57,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617462f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:57, skipping insertion in model container [2021-11-12 22:50:57,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:57" (1/1) ... [2021-11-12 22:50:57,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:57,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:58,165 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-12 22:50:58,172 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-12 22:50:58,195 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:50:58,201 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:50:59,034 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,035 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,036 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,037 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,038 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,055 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,056 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,058 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,067 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,414 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:50:59,415 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:50:59,417 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:50:59,418 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:50:59,419 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:50:59,420 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:50:59,421 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:50:59,421 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:50:59,422 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:50:59,423 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:50:59,615 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:50:59,782 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,783 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:50:59,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:59,929 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:50:59,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@297ec3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:59, skipping insertion in model container [2021-11-12 22:50:59,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:59,933 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:50:59,935 INFO L158 Benchmark]: Toolchain (without parser) took 2156.10ms. Allocated memory is still 109.1MB. Free memory was 79.4MB in the beginning and 62.5MB in the end (delta: 16.9MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-11-12 22:50:59,936 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory is still 59.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:50:59,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2153.81ms. Allocated memory is still 109.1MB. Free memory was 79.2MB in the beginning and 62.5MB in the end (delta: 16.7MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-11-12 22:50:59,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory is still 59.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2153.81ms. Allocated memory is still 109.1MB. Free memory was 79.2MB in the beginning and 62.5MB in the end (delta: 16.7MB). Peak memory consumption was 39.4MB. 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/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_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/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_50aac07c-0ed4-47a5-9288-515a4f27cf20/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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:51:02,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:51:02,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:51:02,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:51:02,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:51:02,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:51:02,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:51:02,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:51:02,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:51:02,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:51:02,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:51:02,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:51:02,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:51:02,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:51:02,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:51:02,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:51:02,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:51:02,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:51:02,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:51:02,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:51:02,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:51:02,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:51:02,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:51:02,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:51:02,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:51:02,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:51:02,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:51:02,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:51:02,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:51:02,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:51:02,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:51:02,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:51:02,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:51:02,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:51:02,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:51:02,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:51:02,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:51:02,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:51:02,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:51:02,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:51:02,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:51:02,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:51:02,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:51:02,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:51:02,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:51:02,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:51:02,284 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:51:02,284 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:51:02,285 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:51:02,285 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:51:02,285 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:51:02,285 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:51:02,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:51:02,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:51:02,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:51:02,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:51:02,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:51:02,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:51:02,289 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:51:02,289 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:51:02,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:51:02,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:51:02,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:51:02,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:51:02,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:51:02,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:51:02,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:02,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:51:02,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:51:02,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:51:02,291 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:51:02,291 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:02,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:51:02,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:51:02,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:51:02,292 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-11-12 22:51:02,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:51:02,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:51:02,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:51:02,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:51:02,685 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:51:02,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-12 22:51:02,750 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/5240a3f95/27aca19787de48c19bcd566d63891463/FLAG91c816240 [2021-11-12 22:51:03,689 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:51:03,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-12 22:51:03,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/5240a3f95/27aca19787de48c19bcd566d63891463/FLAG91c816240 [2021-11-12 22:51:04,141 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/data/5240a3f95/27aca19787de48c19bcd566d63891463 [2021-11-12 22:51:04,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:51:04,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:51:04,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:04,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:51:04,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:51:04,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:04" (1/1) ... [2021-11-12 22:51:04,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4255616c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:04, skipping insertion in model container [2021-11-12 22:51:04,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:04" (1/1) ... [2021-11-12 22:51:04,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:51:04,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:04,554 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-12 22:51:04,561 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-12 22:51:04,591 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:51:04,598 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:51:05,494 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,495 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,495 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,496 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,497 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,522 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,522 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,525 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,527 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:05,960 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:51:05,961 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:51:05,962 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:51:05,964 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:51:05,965 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:51:05,966 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:51:05,967 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:51:05,968 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:51:05,968 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:51:05,969 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:51:06,148 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:51:06,251 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,251 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:06,434 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:51:06,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:06,524 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-12 22:51:06,525 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-12 22:51:06,527 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:51:06,529 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:51:06,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,586 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,586 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,587 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,587 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,606 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,606 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,610 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,611 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,698 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:51:06,699 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:51:06,700 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:51:06,701 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:51:06,702 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:51:06,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:51:06,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:51:06,704 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:51:06,704 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:51:06,705 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:51:06,742 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:51:06,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,827 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:06,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:06,931 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:51:06,956 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-12 22:51:06,956 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_50aac07c-0ed4-47a5-9288-515a4f27cf20/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-12 22:51:06,958 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:51:06,959 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:51:06,998 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,002 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,007 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,008 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,009 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,009 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,043 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:51:07,044 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:51:07,045 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:51:07,046 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:51:07,046 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:51:07,047 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:51:07,048 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:51:07,048 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:51:07,048 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:51:07,049 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:51:07,120 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 22:51:07,191 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,192 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:51:07,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:07,521 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:51:07,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07 WrapperNode [2021-11-12 22:51:07,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:07,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:51:07,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:51:07,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:51:07,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:51:07,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:51:07,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:51:07,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:51:07,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:07,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:08,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:51:08,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:51:08,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:51:08,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:51:08,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (1/1) ... [2021-11-12 22:51:08,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:08,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:08,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:51:08,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:51:08,095 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-12 22:51:08,095 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-12 22:51:08,095 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-11-12 22:51:08,095 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-11-12 22:51:08,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:51:08,096 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 22:51:08,096 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 22:51:08,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:51:08,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:51:08,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:51:08,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:51:08,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:51:08,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:51:08,098 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-12 22:51:08,098 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-12 22:51:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:51:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-12 22:51:08,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-12 22:51:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:51:08,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:51:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 22:51:08,099 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 22:51:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:51:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-12 22:51:08,100 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-12 22:51:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:51:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:51:08,100 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:51:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:51:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:51:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:51:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:51:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:51:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-12 22:51:08,102 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-12 22:51:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-12 22:51:08,102 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-12 22:51:08,103 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-11-12 22:51:08,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-11-12 22:51:23,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:51:23,168 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:51:23,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:23 BoogieIcfgContainer [2021-11-12 22:51:23,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:51:23,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:51:23,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:51:23,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:51:23,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:51:04" (1/3) ... [2021-11-12 22:51:23,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d80e779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:23, skipping insertion in model container [2021-11-12 22:51:23,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:07" (2/3) ... [2021-11-12 22:51:23,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d80e779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:23, skipping insertion in model container [2021-11-12 22:51:23,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:23" (3/3) ... [2021-11-12 22:51:23,189 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2021-11-12 22:51:23,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:51:23,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:51:23,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:51:23,272 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:51:23,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:51:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-12 22:51:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:51:23,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:23,319 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 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, 1, 1] [2021-11-12 22:51:23,319 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash -822403774, now seen corresponding path program 1 times [2021-11-12 22:51:23,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:23,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376308798] [2021-11-12 22:51:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:23,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:23,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:23,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:23,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:51:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:51:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:51:28,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:51:28,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:28,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376308798] [2021-11-12 22:51:28,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376308798] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:28,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:28,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 22:51:28,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156103525] [2021-11-12 22:51:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:28,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:51:28,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:51:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:51:28,727 INFO L87 Difference]: Start difference. First operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:51:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:28,791 INFO L93 Difference]: Finished difference Result 282 states and 407 transitions. [2021-11-12 22:51:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:51:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-12 22:51:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:28,808 INFO L225 Difference]: With dead ends: 282 [2021-11-12 22:51:28,808 INFO L226 Difference]: Without dead ends: 138 [2021-11-12 22:51:28,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:51:28,822 INFO L933 BasicCegarLoop]: 189 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, 189 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:28,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:51:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-12 22:51:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-12 22:51:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-12 22:51:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-11-12 22:51:28,890 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 113 [2021-11-12 22:51:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:28,892 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-11-12 22:51:28,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:51:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-11-12 22:51:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:51:28,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:28,896 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 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, 1, 1] [2021-11-12 22:51:28,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:29,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:29,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1798457792, now seen corresponding path program 1 times [2021-11-12 22:51:29,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:29,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575299508] [2021-11-12 22:51:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:29,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:29,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:29,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:29,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:51:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:33,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:51:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:51:34,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:51:34,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:34,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575299508] [2021-11-12 22:51:34,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575299508] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:34,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:34,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 22:51:34,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304981399] [2021-11-12 22:51:34,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:51:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:51:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:51:34,659 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:51:36,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:37,141 INFO L93 Difference]: Finished difference Result 303 states and 422 transitions. [2021-11-12 22:51:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:51:37,142 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), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-11-12 22:51:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:37,147 INFO L225 Difference]: With dead ends: 303 [2021-11-12 22:51:37,147 INFO L226 Difference]: Without dead ends: 172 [2021-11-12 22:51:37,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:51:37,149 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 39 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2359.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2436.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:37,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 769 Invalid, 92 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 1 Unknown, 0 Unchecked, 2436.38ms Time] [2021-11-12 22:51:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-12 22:51:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2021-11-12 22:51:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 96 states have (on average 1.1979166666666667) internal successors, (115), 99 states have internal predecessors, (115), 55 states have call successors, (55), 12 states have call predecessors, (55), 13 states have return successors, (65), 53 states have call predecessors, (65), 54 states have call successors, (65) [2021-11-12 22:51:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 235 transitions. [2021-11-12 22:51:37,175 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 235 transitions. Word has length 113 [2021-11-12 22:51:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:37,175 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 235 transitions. [2021-11-12 22:51:37,176 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), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:51:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 235 transitions. [2021-11-12 22:51:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:51:37,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:37,180 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:37,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:51:37,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:37,393 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash -796961909, now seen corresponding path program 1 times [2021-11-12 22:51:37,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:37,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976285006] [2021-11-12 22:51:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:37,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:37,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:37,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:51:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:51:41,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:41,992 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 [2021-11-12 22:51:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:51:43,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:44,740 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 [2021-11-12 22:51:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:51:44,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:44,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976285006] [2021-11-12 22:51:44,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976285006] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:44,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:44,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-12 22:51:44,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944103631] [2021-11-12 22:51:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:44,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:51:44,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:44,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:51:44,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:51:44,928 INFO L87 Difference]: Start difference. First operand 165 states and 235 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:51:47,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:49,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:51,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:51,756 INFO L93 Difference]: Finished difference Result 343 states and 483 transitions. [2021-11-12 22:51:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:51:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 119 [2021-11-12 22:51:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:51,761 INFO L225 Difference]: With dead ends: 343 [2021-11-12 22:51:51,761 INFO L226 Difference]: Without dead ends: 178 [2021-11-12 22:51:51,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:51:51,763 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 19 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6588.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 6720.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:51,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1332 Invalid, 131 Unknown, 0 Unchecked, 7.91ms Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 3 Unknown, 86 Unchecked, 6720.81ms Time] [2021-11-12 22:51:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-12 22:51:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-12 22:51:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 111 states have internal predecessors, (130), 55 states have call successors, (55), 13 states have call predecessors, (55), 14 states have return successors, (66), 53 states have call predecessors, (66), 54 states have call successors, (66) [2021-11-12 22:51:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 251 transitions. [2021-11-12 22:51:51,809 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 251 transitions. Word has length 119 [2021-11-12 22:51:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 251 transitions. [2021-11-12 22:51:51,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:51:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 251 transitions. [2021-11-12 22:51:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:51:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:51,822 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:51,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:51:52,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:52,036 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1854799987, now seen corresponding path program 1 times [2021-11-12 22:51:52,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:52,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187851462] [2021-11-12 22:51:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:52,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:52,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:52,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:51:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:51:56,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:51:56,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 22:51:56,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:56,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187851462] [2021-11-12 22:51:56,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187851462] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:56,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:56,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 22:51:56,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443869913] [2021-11-12 22:51:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:56,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:51:56,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:51:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:51:56,958 INFO L87 Difference]: Start difference. First operand 178 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:51:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:57,060 INFO L93 Difference]: Finished difference Result 346 states and 501 transitions. [2021-11-12 22:51:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:51:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 119 [2021-11-12 22:51:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:57,064 INFO L225 Difference]: With dead ends: 346 [2021-11-12 22:51:57,064 INFO L226 Difference]: Without dead ends: 184 [2021-11-12 22:51:57,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:51:57,066 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 20 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:57,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 544 Invalid, 16 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 64.80ms Time] [2021-11-12 22:51:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-12 22:51:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2021-11-12 22:51:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (65), 53 states have call predecessors, (65), 54 states have call successors, (65) [2021-11-12 22:51:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 244 transitions. [2021-11-12 22:51:57,088 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 244 transitions. Word has length 119 [2021-11-12 22:51:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:57,089 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 244 transitions. [2021-11-12 22:51:57,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:51:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 244 transitions. [2021-11-12 22:51:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:51:57,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:57,092 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:57,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:57,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:57,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash -923988269, now seen corresponding path program 1 times [2021-11-12 22:51:57,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:57,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123895757] [2021-11-12 22:51:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:57,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:57,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:57,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:57,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:52:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:52:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:52:02,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 22:52:03,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:03,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123895757] [2021-11-12 22:52:03,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123895757] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:03,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:03,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-12 22:52:03,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687872044] [2021-11-12 22:52:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:03,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:03,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:03,092 INFO L87 Difference]: Start difference. First operand 172 states and 244 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:52:05,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:07,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:09,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:11,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:11,889 INFO L93 Difference]: Finished difference Result 352 states and 521 transitions. [2021-11-12 22:52:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 123 [2021-11-12 22:52:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:11,894 INFO L225 Difference]: With dead ends: 352 [2021-11-12 22:52:11,894 INFO L226 Difference]: Without dead ends: 192 [2021-11-12 22:52:11,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:52:11,897 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 42 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8376.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 8610.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:11,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 665 Invalid, 120 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 3 Unknown, 38 Unchecked, 8610.83ms Time] [2021-11-12 22:52:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-12 22:52:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-11-12 22:52:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (65), 53 states have call predecessors, (65), 54 states have call successors, (65) [2021-11-12 22:52:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 256 transitions. [2021-11-12 22:52:11,943 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 256 transitions. Word has length 123 [2021-11-12 22:52:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:11,943 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 256 transitions. [2021-11-12 22:52:11,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:52:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 256 transitions. [2021-11-12 22:52:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:52:11,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:11,947 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:11,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:52:12,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:12,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash 642769681, now seen corresponding path program 1 times [2021-11-12 22:52:12,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:12,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342203856] [2021-11-12 22:52:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:12,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:12,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:12,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:12,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1988 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:52:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:52:18,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 22:52:20,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:20,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342203856] [2021-11-12 22:52:20,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342203856] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:20,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:20,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-12 22:52:20,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766443429] [2021-11-12 22:52:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:20,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:52:20,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:52:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:52:20,687 INFO L87 Difference]: Start difference. First operand 181 states and 256 transitions. Second operand has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:52:22,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:24,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:29,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:31,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:32,468 INFO L93 Difference]: Finished difference Result 360 states and 541 transitions. [2021-11-12 22:52:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:52:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 123 [2021-11-12 22:52:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:32,474 INFO L225 Difference]: With dead ends: 360 [2021-11-12 22:52:32,475 INFO L226 Difference]: Without dead ends: 190 [2021-11-12 22:52:32,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:52:32,477 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 38 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9792.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 10105.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:32,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1734 Invalid, 541 Unknown, 0 Unchecked, 21.65ms Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 4 Unknown, 305 Unchecked, 10105.95ms Time] [2021-11-12 22:52:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-12 22:52:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2021-11-12 22:52:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 116 states have (on average 1.1896551724137931) internal successors, (138), 119 states have internal predecessors, (138), 55 states have call successors, (55), 13 states have call predecessors, (55), 14 states have return successors, (77), 53 states have call predecessors, (77), 54 states have call successors, (77) [2021-11-12 22:52:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-11-12 22:52:32,500 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 123 [2021-11-12 22:52:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:32,501 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-11-12 22:52:32,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:52:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-11-12 22:52:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:52:32,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:32,504 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:32,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:32,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:32,727 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1510264491, now seen corresponding path program 1 times [2021-11-12 22:52:32,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:32,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18699808] [2021-11-12 22:52:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:32,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:32,731 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:32,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:52:37,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 22:52:37,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:37,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18699808] [2021-11-12 22:52:37,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18699808] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:37,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:37,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-12 22:52:37,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336753727] [2021-11-12 22:52:37,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:37,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:37,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:37,503 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:52:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:37,598 INFO L93 Difference]: Finished difference Result 364 states and 539 transitions. [2021-11-12 22:52:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 123 [2021-11-12 22:52:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:37,603 INFO L225 Difference]: With dead ends: 364 [2021-11-12 22:52:37,604 INFO L226 Difference]: Without dead ends: 190 [2021-11-12 22:52:37,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:37,607 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 34 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:37,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 535 Invalid, 13 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 55.74ms Time] [2021-11-12 22:52:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-12 22:52:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2021-11-12 22:52:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 115 states have internal predecessors, (131), 55 states have call successors, (55), 13 states have call predecessors, (55), 14 states have return successors, (77), 53 states have call predecessors, (77), 54 states have call successors, (77) [2021-11-12 22:52:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 263 transitions. [2021-11-12 22:52:37,638 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 263 transitions. Word has length 123 [2021-11-12 22:52:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:37,639 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 263 transitions. [2021-11-12 22:52:37,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:52:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 263 transitions. [2021-11-12 22:52:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:52:37,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:37,642 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:37,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:37,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:37,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash 366218327, now seen corresponding path program 1 times [2021-11-12 22:52:37,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:37,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233193856] [2021-11-12 22:52:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:37,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:37,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:37,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:37,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1986 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:52:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:52:42,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 22:52:43,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:43,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233193856] [2021-11-12 22:52:43,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233193856] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:43,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:43,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-12 22:52:43,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45717788] [2021-11-12 22:52:43,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:43,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:52:43,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:52:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:52:43,029 INFO L87 Difference]: Start difference. First operand 182 states and 263 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:52:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:43,575 INFO L93 Difference]: Finished difference Result 363 states and 544 transitions. [2021-11-12 22:52:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:52:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 123 [2021-11-12 22:52:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:43,579 INFO L225 Difference]: With dead ends: 363 [2021-11-12 22:52:43,579 INFO L226 Difference]: Without dead ends: 191 [2021-11-12 22:52:43,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:52:43,582 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 12 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 366.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 431.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:43,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1317 Invalid, 142 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 431.95ms Time] [2021-11-12 22:52:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-12 22:52:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 182. [2021-11-12 22:52:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 115 states have internal predecessors, (131), 55 states have call successors, (55), 13 states have call predecessors, (55), 14 states have return successors, (77), 53 states have call predecessors, (77), 54 states have call successors, (77) [2021-11-12 22:52:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 263 transitions. [2021-11-12 22:52:43,615 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 263 transitions. Word has length 123 [2021-11-12 22:52:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:43,616 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 263 transitions. [2021-11-12 22:52:43,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 22:52:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 263 transitions. [2021-11-12 22:52:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:52:43,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:43,619 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:43,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:43,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:43,835 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 66112926, now seen corresponding path program 1 times [2021-11-12 22:52:43,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:43,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697107915] [2021-11-12 22:52:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:43,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:43,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:43,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:43,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:52:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:48,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:52:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:52:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:52:49,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:49,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697107915] [2021-11-12 22:52:49,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697107915] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:49,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:49,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 22:52:49,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295028642] [2021-11-12 22:52:49,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:49,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:49,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:49,211 INFO L87 Difference]: Start difference. First operand 182 states and 263 transitions. Second operand has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:52:52,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:54,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:54,315 INFO L93 Difference]: Finished difference Result 300 states and 437 transitions. [2021-11-12 22:52:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:52:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 125 [2021-11-12 22:52:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:54,319 INFO L225 Difference]: With dead ends: 300 [2021-11-12 22:52:54,319 INFO L226 Difference]: Without dead ends: 182 [2021-11-12 22:52:54,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:54,323 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 47 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4992.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5061.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:54,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 626 Invalid, 77 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [38 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 5061.67ms Time] [2021-11-12 22:52:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-12 22:52:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2021-11-12 22:52:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 103 states have internal predecessors, (119), 42 states have call successors, (42), 13 states have call predecessors, (42), 14 states have return successors, (52), 41 states have call predecessors, (52), 41 states have call successors, (52) [2021-11-12 22:52:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 213 transitions. [2021-11-12 22:52:54,339 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 213 transitions. Word has length 125 [2021-11-12 22:52:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:54,340 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 213 transitions. [2021-11-12 22:52:54,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.4) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:52:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 213 transitions. [2021-11-12 22:52:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:52:54,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:54,346 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:54,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:54,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:54,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1528765260, now seen corresponding path program 1 times [2021-11-12 22:52:54,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:54,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370801772] [2021-11-12 22:52:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:54,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:54,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:54,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:52:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:52:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:52:59,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 22:52:59,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:59,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370801772] [2021-11-12 22:52:59,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370801772] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:59,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:59,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-12 22:52:59,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024023355] [2021-11-12 22:52:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:59,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:59,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:59,914 INFO L87 Difference]: Start difference. First operand 158 states and 213 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:53:01,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:02,175 INFO L93 Difference]: Finished difference Result 273 states and 370 transitions. [2021-11-12 22:53:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 137 [2021-11-12 22:53:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:02,177 INFO L225 Difference]: With dead ends: 273 [2021-11-12 22:53:02,177 INFO L226 Difference]: Without dead ends: 155 [2021-11-12 22:53:02,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:53:02,178 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 46 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2185.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2227.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:02,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 635 Invalid, 59 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [31 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 2227.28ms Time] [2021-11-12 22:53:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-12 22:53:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-12 22:53:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 100 states have internal predecessors, (116), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (48), 41 states have call predecessors, (48), 41 states have call successors, (48) [2021-11-12 22:53:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 206 transitions. [2021-11-12 22:53:02,188 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 206 transitions. Word has length 137 [2021-11-12 22:53:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 206 transitions. [2021-11-12 22:53:02,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-12 22:53:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 206 transitions. [2021-11-12 22:53:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 22:53:02,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:02,192 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:02,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:02,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:02,415 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -64011393, now seen corresponding path program 1 times [2021-11-12 22:53:02,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:02,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856972586] [2021-11-12 22:53:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:02,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:02,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:02,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:53:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-12 22:53:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:11,322 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 22:53:11,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-12 22:53:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 22:53:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:53:27,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:27,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856972586] [2021-11-12 22:53:27,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856972586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:27,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1650025750] [2021-11-12 22:53:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:27,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:27,063 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:27,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:53:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-12 22:53:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:31,399 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 563 treesize of output 179 [2021-11-12 22:53:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:31,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 193 [2021-11-12 22:53:33,791 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 22:53:33,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-12 22:53:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 22:53:34,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 22:53:43,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1650025750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:43,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727932906] [2021-11-12 22:53:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:43,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:43,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:43,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:43,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 22:53:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:53:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:46,248 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 [2021-11-12 22:53:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:49,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 39 [2021-11-12 22:53:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-11-12 22:53:50,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:53:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-12 22:53:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 22:53:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:00,940 INFO L354 Elim1Store]: treesize reduction 1602, result has 1.0 percent of original size [2021-11-12 22:54:00,940 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 8 case distinctions, treesize of input 130 treesize of output 38 [2021-11-12 22:54:00,946 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 38 treesize of output 34 [2021-11-12 22:54:00,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 43 [2021-11-12 22:54:01,830 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 [2021-11-12 22:54:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 22:54:02,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727932906] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:02,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:54:02,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19, 14, 19, 14, 14] total 52 [2021-11-12 22:54:02,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223417211] [2021-11-12 22:54:02,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:54:02,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:54:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2463, Unknown=1, NotChecked=0, Total=2652 [2021-11-12 22:54:02,014 INFO L87 Difference]: Start difference. First operand 155 states and 206 transitions. Second operand has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-12 22:54:04,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:06,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:08,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:10,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:12,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:16,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:17,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:19,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:21,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:23,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:24,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:26,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:33,479 INFO L93 Difference]: Finished difference Result 333 states and 451 transitions. [2021-11-12 22:54:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:54:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 143 [2021-11-12 22:54:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:33,482 INFO L225 Difference]: With dead ends: 333 [2021-11-12 22:54:33,482 INFO L226 Difference]: Without dead ends: 239 [2021-11-12 22:54:33,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 779 SyntacticMatches, 26 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=308, Invalid=3981, Unknown=1, NotChecked=0, Total=4290 [2021-11-12 22:54:33,486 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 109 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 75 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26322.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.76ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 26935.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:33,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1081 Invalid, 1560 Unknown, 0 Unchecked, 16.76ms Time], IncrementalHoareTripleChecker [75 Valid, 941 Invalid, 8 Unknown, 536 Unchecked, 26935.22ms Time] [2021-11-12 22:54:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-12 22:54:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2021-11-12 22:54:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 139 states have internal predecessors, (159), 46 states have call successors, (46), 16 states have call predecessors, (46), 18 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-11-12 22:54:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 256 transitions. [2021-11-12 22:54:33,503 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 256 transitions. Word has length 143 [2021-11-12 22:54:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:33,503 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 256 transitions. [2021-11-12 22:54:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-12 22:54:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 256 transitions. [2021-11-12 22:54:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:54:33,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:33,507 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:33,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:33,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-12 22:54:33,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:34,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:34,131 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:34,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1979851013, now seen corresponding path program 1 times [2021-11-12 22:54:34,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:34,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678165426] [2021-11-12 22:54:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:34,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:34,137 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:34,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50aac07c-0ed4-47a5-9288-515a4f27cf20/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-12 22:54:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:42,988 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-12 22:54:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-12 22:54:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:54:43,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:51,137 INFO L354 Elim1Store]: treesize reduction 1572, result has 0.1 percent of original size [2021-11-12 22:54:51,138 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 252 treesize of output 1 [2021-11-12 22:55:32,148 WARN L227 SmtUtils]: Spent 31.16s on a formula simplification. DAG size of input: 1166 DAG size of output: 513 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 22:55:32,154 INFO L354 Elim1Store]: treesize reduction 2280, result has 39.2 percent of original size [2021-11-12 22:55:32,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 252 treesize of output 1538