./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_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_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/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_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/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_912f25b2-4205-4a3c-b2c1-a05a10286290/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 c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:29,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:29,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:29,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:29,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:29,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:29,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:29,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:29,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:29,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:29,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:29,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:29,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:29,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:29,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:29,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:29,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:29,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:29,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:30,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:30,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:30,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:30,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:30,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:30,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:30,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:30,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:30,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:30,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:30,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:30,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:30,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:30,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:30,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:30,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:30,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:30,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:30,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:30,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:30,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:30,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:30,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:27:30,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:30,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:30,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:30,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:30,101 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:30,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:30,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:30,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:27:30,102 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:30,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:30,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:27:30,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:27:30,104 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:30,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:27:30,105 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:27:30,105 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:27:30,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:30,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:27:30,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:30,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:30,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:30,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:30,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:30,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:30,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:30,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:30,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:30,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:30,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:30,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:30,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:30,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:30,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:27:30,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:27:30,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:30,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:30,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:30,113 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_912f25b2-4205-4a3c-b2c1-a05a10286290/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 [2021-11-13 01:27:30,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:30,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:30,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:30,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:30,497 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:30,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2021-11-13 01:27:30,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/8d69f9df3/1143b3ef13b940ebbe4103fe81fa2c97/FLAG273ac12cc [2021-11-13 01:27:31,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:31,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2021-11-13 01:27:31,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/8d69f9df3/1143b3ef13b940ebbe4103fe81fa2c97/FLAG273ac12cc [2021-11-13 01:27:31,934 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/8d69f9df3/1143b3ef13b940ebbe4103fe81fa2c97 [2021-11-13 01:27:31,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:31,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:31,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:31,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:31,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:31,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e6b4aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:31, skipping insertion in model container [2021-11-13 01:27:31,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:32,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:32,344 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2021-11-13 01:27:32,355 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2021-11-13 01:27:32,392 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:27:32,403 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:27:33,468 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,476 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,477 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,478 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,480 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,505 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,507 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,510 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:33,511 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:34,030 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:27:34,031 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:27:34,032 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:27:34,034 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:27:34,036 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:27:34,037 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:27:34,038 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:27:34,043 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:27:34,045 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:27:34,046 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:27:34,277 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:27:34,394 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:34,394 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:34,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:34,543 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:27:34,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ad55800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:34, skipping insertion in model container [2021-11-13 01:27:34,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:34,544 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:27:34,547 INFO L158 Benchmark]: Toolchain (without parser) took 2606.72ms. Allocated memory was 102.8MB in the beginning and 157.3MB in the end (delta: 54.5MB). Free memory was 76.0MB in the beginning and 88.7MB in the end (delta: -12.7MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2021-11-13 01:27:34,548 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:27:34,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2604.04ms. Allocated memory was 102.8MB in the beginning and 157.3MB in the end (delta: 54.5MB). Free memory was 76.0MB in the beginning and 88.7MB in the end (delta: -12.7MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2021-11-13 01:27:34,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2604.04ms. Allocated memory was 102.8MB in the beginning and 157.3MB in the end (delta: 54.5MB). Free memory was 76.0MB in the beginning and 88.7MB in the end (delta: -12.7MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/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_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/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_912f25b2-4205-4a3c-b2c1-a05a10286290/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 c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:37,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:37,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:37,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:37,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:37,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:37,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:37,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:37,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:37,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:37,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:37,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:37,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:37,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:37,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:37,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:37,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:37,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:37,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:37,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:37,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:37,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:37,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:37,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:37,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:37,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:37,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:37,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:37,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:37,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:37,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:37,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:37,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:37,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:37,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:37,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:37,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:37,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:37,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:37,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:37,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:37,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:27:37,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:37,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:37,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:37,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:37,434 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:37,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:37,434 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:37,434 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:37,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:37,435 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:37,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:37,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:37,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:37,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:37,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:37,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:37,439 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:27:37,439 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:27:37,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:37,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:37,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:37,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:37,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:27:37,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:37,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:37,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:37,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:37,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:37,442 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:27:37,442 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:27:37,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:37,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:37,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:37,443 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_912f25b2-4205-4a3c-b2c1-a05a10286290/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 [2021-11-13 01:27:37,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:37,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:37,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:37,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:37,925 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:37,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2021-11-13 01:27:38,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/0a9970e73/d4e11e39218f4ddfa0ff6652ee5983c0/FLAG4cb62d232 [2021-11-13 01:27:39,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:39,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2021-11-13 01:27:39,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/0a9970e73/d4e11e39218f4ddfa0ff6652ee5983c0/FLAG4cb62d232 [2021-11-13 01:27:39,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/data/0a9970e73/d4e11e39218f4ddfa0ff6652ee5983c0 [2021-11-13 01:27:39,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:39,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:39,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:39,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:39,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:39,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:39" (1/1) ... [2021-11-13 01:27:39,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec9d6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:39, skipping insertion in model container [2021-11-13 01:27:39,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:39" (1/1) ... [2021-11-13 01:27:39,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:39,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:40,058 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2021-11-13 01:27:40,068 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2021-11-13 01:27:40,107 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:27:40,116 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:27:41,834 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,839 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,842 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,843 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,845 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,879 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,882 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:41,887 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:42,533 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:27:42,534 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:27:42,536 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:27:42,538 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:27:42,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:27:42,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:27:42,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:27:42,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:27:42,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:27:42,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:27:42,775 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:27:42,883 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:42,883 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:42,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:43,049 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:27:43,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:43,124 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2021-11-13 01:27:43,124 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2021-11-13 01:27:43,126 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:27:43,127 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:27:43,164 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,165 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,166 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,166 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,167 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,175 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,175 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,177 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,177 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,245 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:27:43,246 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:27:43,247 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:27:43,248 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:27:43,249 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:27:43,250 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:27:43,250 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:27:43,251 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:27:43,252 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:27:43,252 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:27:43,279 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:27:43,353 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,354 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:43,448 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:27:43,463 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2021-11-13 01:27:43,463 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_912f25b2-4205-4a3c-b2c1-a05a10286290/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2021-11-13 01:27:43,465 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:27:43,466 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:27:43,499 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,499 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,500 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,500 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,501 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,507 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,508 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,509 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,509 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,543 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:27:43,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:27:43,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:27:43,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:27:43,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:27:43,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:27:43,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:27:43,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:27:43,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:27:43,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:27:43,569 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:27:43,657 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,657 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:27:43,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:44,281 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:27:44,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44 WrapperNode [2021-11-13 01:27:44,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:44,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:44,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:27:44,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:27:44,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:44,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:27:44,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:27:44,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:27:44,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:27:44,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:27:44,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:27:44,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:27:44,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (1/1) ... [2021-11-13 01:27:44,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:44,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:27:44,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:27:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 01:27:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:27:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-13 01:27:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-13 01:27:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:27:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 01:27:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:27:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-13 01:27:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-13 01:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:27:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:27:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 01:27:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 01:27:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:27:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-13 01:27:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-13 01:27:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 01:27:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-13 01:27:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-13 01:27:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:27:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:27:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:27:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-13 01:27:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-13 01:27:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 01:27:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 01:27:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:27:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 01:27:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 01:27:59,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:27:59,609 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 01:27:59,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:59 BoogieIcfgContainer [2021-11-13 01:27:59,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:27:59,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:27:59,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:27:59,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:27:59,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:27:39" (1/3) ... [2021-11-13 01:27:59,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4cc729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:59, skipping insertion in model container [2021-11-13 01:27:59,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:44" (2/3) ... [2021-11-13 01:27:59,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4cc729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:59, skipping insertion in model container [2021-11-13 01:27:59,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:59" (3/3) ... [2021-11-13 01:27:59,620 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_eq_harness.i [2021-11-13 01:27:59,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:27:59,626 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:27:59,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:27:59,687 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:27:59,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:27:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 01:27:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 01:27:59,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:59,721 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 01:27:59,722 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1074851773, now seen corresponding path program 1 times [2021-11-13 01:27:59,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:27:59,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557071478] [2021-11-13 01:27:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:59,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:27:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:27:59,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:27:59,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:28:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:28:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:28:05,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:28:05,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:05,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557071478] [2021-11-13 01:28:05,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557071478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:05,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:05,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:28:05,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6525721] [2021-11-13 01:28:05,319 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:05,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:28:05,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:05,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:28:05,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:28:05,373 INFO L87 Difference]: Start difference. First operand has 87 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 01:28:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:05,435 INFO L93 Difference]: Finished difference Result 171 states and 245 transitions. [2021-11-13 01:28:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:28:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 65 [2021-11-13 01:28:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:05,450 INFO L225 Difference]: With dead ends: 171 [2021-11-13 01:28:05,450 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 01:28:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:28:05,462 INFO L933 BasicCegarLoop]: 112 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, 112 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:05,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 7.19ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:28:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 01:28:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-13 01:28:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 50 states have internal predecessors, (59), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 01:28:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-11-13 01:28:05,541 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 65 [2021-11-13 01:28:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:05,542 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-11-13 01:28:05,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 01:28:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-11-13 01:28:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 01:28:05,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:05,548 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 01:28:05,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 01:28:05,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:05,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash 401511231, now seen corresponding path program 1 times [2021-11-13 01:28:05,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:05,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230639463] [2021-11-13 01:28:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:05,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:05,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:05,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:05,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:28:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 01:28:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 01:28:11,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:28:12,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:12,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230639463] [2021-11-13 01:28:12,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230639463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:28:12,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450405640] [2021-11-13 01:28:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:12,704 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:28:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:28:12,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:28:12,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-13 01:28:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:28:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:15,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:15,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450405640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:15,419 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:28:15,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [13, 8] total 17 [2021-11-13 01:28:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270668230] [2021-11-13 01:28:15,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:28:15,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:28:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:28:15,424 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:28:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:15,702 INFO L93 Difference]: Finished difference Result 142 states and 190 transitions. [2021-11-13 01:28:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:28:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 65 [2021-11-13 01:28:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:15,709 INFO L225 Difference]: With dead ends: 142 [2021-11-13 01:28:15,710 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 01:28:15,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:28:15,712 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 19 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.63ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:15,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 503 Invalid, 53 Unknown, 0 Unchecked, 9.83ms Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 196.63ms Time] [2021-11-13 01:28:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 01:28:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-11-13 01:28:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 29 states have call successors, (29), 9 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-13 01:28:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2021-11-13 01:28:15,737 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 65 [2021-11-13 01:28:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:15,738 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2021-11-13 01:28:15,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:28:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2021-11-13 01:28:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 01:28:15,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:15,742 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 01:28:15,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:15,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-13 01:28:16,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:28:16,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 560902053, now seen corresponding path program 1 times [2021-11-13 01:28:16,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:16,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505984479] [2021-11-13 01:28:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:16,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:16,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:16,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:28:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:20,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:21,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:21,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505984479] [2021-11-13 01:28:21,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505984479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:21,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:21,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 01:28:21,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501833025] [2021-11-13 01:28:21,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:21,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:21,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:21,062 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:28:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:21,237 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2021-11-13 01:28:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2021-11-13 01:28:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:21,243 INFO L225 Difference]: With dead ends: 113 [2021-11-13 01:28:21,243 INFO L226 Difference]: Without dead ends: 111 [2021-11-13 01:28:21,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:28:21,245 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 18 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:21,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 632 Invalid, 57 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 137.00ms Time] [2021-11-13 01:28:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-13 01:28:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2021-11-13 01:28:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 59 states have internal predecessors, (67), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-11-13 01:28:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2021-11-13 01:28:21,265 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 66 [2021-11-13 01:28:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2021-11-13 01:28:21,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:28:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2021-11-13 01:28:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 01:28:21,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:21,270 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 01:28:21,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:21,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:21,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash 577529309, now seen corresponding path program 1 times [2021-11-13 01:28:21,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:21,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603409331] [2021-11-13 01:28:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:21,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:21,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:21,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:21,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:28:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:28:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:26,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:26,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:26,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603409331] [2021-11-13 01:28:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603409331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:26,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:26,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:28:26,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165806705] [2021-11-13 01:28:26,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:26,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:28:26,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:28:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:28:26,367 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 01:28:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:26,427 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2021-11-13 01:28:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:28:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 70 [2021-11-13 01:28:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:26,432 INFO L225 Difference]: With dead ends: 117 [2021-11-13 01:28:26,432 INFO L226 Difference]: Without dead ends: 101 [2021-11-13 01:28:26,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:28:26,434 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 0 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:26,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 414 Invalid, 10 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 48.88ms Time] [2021-11-13 01:28:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-13 01:28:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-13 01:28:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 30 states have call successors, (30), 10 states have call predecessors, (30), 12 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2021-11-13 01:28:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-11-13 01:28:26,452 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 70 [2021-11-13 01:28:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:26,453 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-11-13 01:28:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 01:28:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-11-13 01:28:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 01:28:26,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:26,457 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 01:28:26,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:26,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:26,683 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 706612028, now seen corresponding path program 1 times [2021-11-13 01:28:26,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:26,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491680907] [2021-11-13 01:28:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:26,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:26,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:28:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:28:31,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 01:28:32,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:28:33,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:33,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491680907] [2021-11-13 01:28:33,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491680907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:28:33,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384763818] [2021-11-13 01:28:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:33,137 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:28:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:28:33,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:28:33,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 01:28:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:28:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:42,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:42,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384763818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:42,480 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:28:42,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [12, 11] total 18 [2021-11-13 01:28:42,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804826220] [2021-11-13 01:28:42,480 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:42,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:28:42,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:28:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:28:42,483 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:28:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:42,591 INFO L93 Difference]: Finished difference Result 166 states and 227 transitions. [2021-11-13 01:28:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 70 [2021-11-13 01:28:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:42,598 INFO L225 Difference]: With dead ends: 166 [2021-11-13 01:28:42,598 INFO L226 Difference]: Without dead ends: 134 [2021-11-13 01:28:42,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:28:42,600 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 6 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:42,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 535 Invalid, 31 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 84.61ms Time] [2021-11-13 01:28:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-13 01:28:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-11-13 01:28:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 75 states have internal predecessors, (88), 45 states have call successors, (45), 10 states have call predecessors, (45), 13 states have return successors, (53), 47 states have call predecessors, (53), 44 states have call successors, (53) [2021-11-13 01:28:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 186 transitions. [2021-11-13 01:28:42,624 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 186 transitions. Word has length 70 [2021-11-13 01:28:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 186 transitions. [2021-11-13 01:28:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:28:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 186 transitions. [2021-11-13 01:28:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 01:28:42,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:42,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 01:28:42,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:42,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-13 01:28:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:43,044 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash -272868544, now seen corresponding path program 1 times [2021-11-13 01:28:43,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:43,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267415511] [2021-11-13 01:28:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:43,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:43,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:43,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:28:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:47,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:28:47,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 01:28:48,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:28:49,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:49,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267415511] [2021-11-13 01:28:49,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267415511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:28:49,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1984823487] [2021-11-13 01:28:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:49,016 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:28:49,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:28:49,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:28:49,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 01:28:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:28:57,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:57,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:28:58,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1984823487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:58,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:28:58,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [12, 11] total 19 [2021-11-13 01:28:58,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419543365] [2021-11-13 01:28:58,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:58,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:58,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:28:58,256 INFO L87 Difference]: Start difference. First operand 132 states and 186 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:28:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:58,453 INFO L93 Difference]: Finished difference Result 150 states and 204 transitions. [2021-11-13 01:28:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:28:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2021-11-13 01:28:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:58,465 INFO L225 Difference]: With dead ends: 150 [2021-11-13 01:28:58,465 INFO L226 Difference]: Without dead ends: 124 [2021-11-13 01:28:58,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:28:58,468 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 18 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.47ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:58,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 681 Invalid, 47 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 135.47ms Time] [2021-11-13 01:28:58,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-13 01:28:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-13 01:28:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 39 states have call successors, (39), 10 states have call predecessors, (39), 13 states have return successors, (46), 41 states have call predecessors, (46), 38 states have call successors, (46) [2021-11-13 01:28:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2021-11-13 01:28:58,508 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 71 [2021-11-13 01:28:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:58,509 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2021-11-13 01:28:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:28:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2021-11-13 01:28:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 01:28:58,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:58,514 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:58,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:58,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:58,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:58,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -181852488, now seen corresponding path program 1 times [2021-11-13 01:28:58,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:58,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443258357] [2021-11-13 01:28:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:58,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:58,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:58,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:58,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:29:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 01:29:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:04,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:07,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:07,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443258357] [2021-11-13 01:29:07,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443258357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:07,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634111614] [2021-11-13 01:29:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:07,040 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:07,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:07,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 01:29:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:29:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 01:29:08,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 01:29:09,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634111614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:29:09,202 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:29:09,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 15] total 27 [2021-11-13 01:29:09,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793842381] [2021-11-13 01:29:09,202 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:09,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:29:09,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:29:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:29:09,204 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 01:29:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:09,262 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2021-11-13 01:29:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:29:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 81 [2021-11-13 01:29:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:09,266 INFO L225 Difference]: With dead ends: 161 [2021-11-13 01:29:09,266 INFO L226 Difference]: Without dead ends: 124 [2021-11-13 01:29:09,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:29:09,268 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:09,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 314 Invalid, 8 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 47.60ms Time] [2021-11-13 01:29:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-13 01:29:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-13 01:29:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 39 states have call successors, (39), 10 states have call predecessors, (39), 13 states have return successors, (46), 43 states have call predecessors, (46), 38 states have call successors, (46) [2021-11-13 01:29:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 169 transitions. [2021-11-13 01:29:09,284 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 169 transitions. Word has length 81 [2021-11-13 01:29:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:09,285 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 169 transitions. [2021-11-13 01:29:09,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 01:29:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 169 transitions. [2021-11-13 01:29:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 01:29:09,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:09,288 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:29:09,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:09,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:09,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -343504052, now seen corresponding path program 1 times [2021-11-13 01:29:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:09,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423427354] [2021-11-13 01:29:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:09,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:09,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:09,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:29:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 01:29:13,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:15,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:17,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:17,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423427354] [2021-11-13 01:29:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423427354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:17,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225126468] [2021-11-13 01:29:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:17,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:17,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:17,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 01:29:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:29:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 01:29:26,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 01:29:26,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225126468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:29:26,732 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:29:26,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [16, 15] total 32 [2021-11-13 01:29:26,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752993978] [2021-11-13 01:29:26,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:26,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:29:26,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:29:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-11-13 01:29:26,735 INFO L87 Difference]: Start difference. First operand 124 states and 169 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 01:29:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:27,486 INFO L93 Difference]: Finished difference Result 179 states and 238 transitions. [2021-11-13 01:29:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:29:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 82 [2021-11-13 01:29:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:27,489 INFO L225 Difference]: With dead ends: 179 [2021-11-13 01:29:27,489 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 01:29:27,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 01:29:27,492 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 452.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.19ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 541.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:27,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 859 Invalid, 200 Unknown, 0 Unchecked, 5.19ms Time], IncrementalHoareTripleChecker [13 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 541.34ms Time] [2021-11-13 01:29:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 01:29:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2021-11-13 01:29:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (45), 42 states have call predecessors, (45), 40 states have call successors, (45) [2021-11-13 01:29:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2021-11-13 01:29:27,512 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 82 [2021-11-13 01:29:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:27,513 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2021-11-13 01:29:27,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 01:29:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2021-11-13 01:29:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 01:29:27,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:27,516 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 01:29:27,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:27,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 01:29:27,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:27,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash 90143423, now seen corresponding path program 1 times [2021-11-13 01:29:27,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:27,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250557593] [2021-11-13 01:29:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:27,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:27,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:27,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:29:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 01:29:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 01:29:33,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 01:29:34,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:34,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250557593] [2021-11-13 01:29:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250557593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:34,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303585782] [2021-11-13 01:29:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:34,698 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:34,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:34,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:29:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:29:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 01:29:43,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 01:29:44,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303585782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:44,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158266463] [2021-11-13 01:29:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:44,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:29:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:29:44,673 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:29:44,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 01:29:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:29:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 01:29:46,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 01:29:47,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158266463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:47,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:29:47,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14, 14, 12, 12] total 25 [2021-11-13 01:29:47,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132850769] [2021-11-13 01:29:47,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:29:47,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:29:47,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:29:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:29:47,394 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 25 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (25), 13 states have call predecessors, (25), 11 states have call successors, (25) [2021-11-13 01:29:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:49,777 INFO L93 Difference]: Finished difference Result 192 states and 260 transitions. [2021-11-13 01:29:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:29:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (25), 13 states have call predecessors, (25), 11 states have call successors, (25) Word has length 81 [2021-11-13 01:29:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:49,783 INFO L225 Difference]: With dead ends: 192 [2021-11-13 01:29:49,783 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 01:29:49,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 453 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-11-13 01:29:49,785 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 103 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1877.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.68ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2072.56ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:49,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1323 Invalid, 740 Unknown, 0 Unchecked, 10.68ms Time], IncrementalHoareTripleChecker [75 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 2072.56ms Time] [2021-11-13 01:29:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 01:29:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2021-11-13 01:29:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.162162162162162) internal successors, (86), 76 states have internal predecessors, (86), 45 states have call successors, (45), 12 states have call predecessors, (45), 14 states have return successors, (55), 46 states have call predecessors, (55), 44 states have call successors, (55) [2021-11-13 01:29:49,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2021-11-13 01:29:49,802 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 81 [2021-11-13 01:29:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:49,803 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2021-11-13 01:29:49,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (24), 2 states have call predecessors, (24), 6 states have return successors, (25), 13 states have call predecessors, (25), 11 states have call successors, (25) [2021-11-13 01:29:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2021-11-13 01:29:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 01:29:49,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:49,806 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:29:49,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:50,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:50,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 01:29:50,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:50,420 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:29:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1562553972, now seen corresponding path program 1 times [2021-11-13 01:29:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:50,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686221850] [2021-11-13 01:29:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:50,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:50,425 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:50,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:29:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 01:29:54,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:56,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:58,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:58,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686221850] [2021-11-13 01:29:58,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686221850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:58,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [623014961] [2021-11-13 01:29:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:58,074 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:58,077 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:58,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 01:30:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:30:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 01:30:07,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 01:30:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [623014961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:07,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:30:07,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [16, 15] total 27 [2021-11-13 01:30:07,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669874770] [2021-11-13 01:30:07,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:07,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:30:07,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:30:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:30:07,510 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:07,601 INFO L93 Difference]: Finished difference Result 189 states and 274 transitions. [2021-11-13 01:30:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:30:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 86 [2021-11-13 01:30:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:07,605 INFO L225 Difference]: With dead ends: 189 [2021-11-13 01:30:07,605 INFO L226 Difference]: Without dead ends: 157 [2021-11-13 01:30:07,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:30:07,607 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 10 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.24ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:07,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 658 Invalid, 21 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 75.24ms Time] [2021-11-13 01:30:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-13 01:30:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-13 01:30:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 87 states have internal predecessors, (100), 56 states have call successors, (56), 12 states have call predecessors, (56), 14 states have return successors, (66), 58 states have call predecessors, (66), 54 states have call successors, (66) [2021-11-13 01:30:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 222 transitions. [2021-11-13 01:30:07,641 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 222 transitions. Word has length 86 [2021-11-13 01:30:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:07,642 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 222 transitions. [2021-11-13 01:30:07,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:30:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 222 transitions. [2021-11-13 01:30:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-13 01:30:07,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:07,651 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-13 01:30:07,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:07,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-13 01:30:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:08,071 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash -300752561, now seen corresponding path program 1 times [2021-11-13 01:30:08,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:08,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980975490] [2021-11-13 01:30:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:08,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:08,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:08,078 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:08,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:30:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1857 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:30:12,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 01:30:14,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 01:30:17,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:17,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980975490] [2021-11-13 01:30:17,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980975490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:30:17,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822546311] [2021-11-13 01:30:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:17,456 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:17,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:30:17,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:30:17,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-13 01:30:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1857 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:30:25,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-13 01:30:26,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-13 01:30:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822546311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:27,460 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:30:27,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [23, 22] total 38 [2021-11-13 01:30:27,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134634692] [2021-11-13 01:30:27,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:30:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:30:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 01:30:27,463 INFO L87 Difference]: Start difference. First operand 157 states and 222 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:30:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:28,393 INFO L93 Difference]: Finished difference Result 215 states and 311 transitions. [2021-11-13 01:30:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 01:30:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 97 [2021-11-13 01:30:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:28,396 INFO L225 Difference]: With dead ends: 215 [2021-11-13 01:30:28,396 INFO L226 Difference]: Without dead ends: 190 [2021-11-13 01:30:28,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 01:30:28,398 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 68 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 547.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.02ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 629.30ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:28,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1245 Invalid, 167 Unknown, 0 Unchecked, 8.02ms Time], IncrementalHoareTripleChecker [36 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 629.30ms Time] [2021-11-13 01:30:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-13 01:30:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 157. [2021-11-13 01:30:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 87 states have internal predecessors, (100), 56 states have call successors, (56), 12 states have call predecessors, (56), 14 states have return successors, (64), 58 states have call predecessors, (64), 54 states have call successors, (64) [2021-11-13 01:30:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 220 transitions. [2021-11-13 01:30:28,418 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 220 transitions. Word has length 97 [2021-11-13 01:30:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:28,419 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 220 transitions. [2021-11-13 01:30:28,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:30:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 220 transitions. [2021-11-13 01:30:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 01:30:28,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:28,423 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:28,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:28,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:28,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:28,839 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash -612639878, now seen corresponding path program 1 times [2021-11-13 01:30:28,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:28,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969826495] [2021-11-13 01:30:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:28,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:28,845 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:28,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:30:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:33,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 01:30:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 01:30:34,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:35,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:35,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969826495] [2021-11-13 01:30:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969826495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:30:35,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1411957289] [2021-11-13 01:30:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:35,569 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:30:35,575 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:30:35,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 01:30:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 01:30:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 01:30:44,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1411957289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:30:45,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276612540] [2021-11-13 01:30:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:45,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:30:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:30:45,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:30:45,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 01:30:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:30:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:47,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:49,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276612540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:49,297 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:30:49,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [15, 15, 15, 15] total 21 [2021-11-13 01:30:49,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532736362] [2021-11-13 01:30:49,298 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:49,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 01:30:49,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:49,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 01:30:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:30:49,300 INFO L87 Difference]: Start difference. First operand 157 states and 220 transitions. Second operand has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-13 01:30:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:50,734 INFO L93 Difference]: Finished difference Result 219 states and 302 transitions. [2021-11-13 01:30:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 01:30:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 88 [2021-11-13 01:30:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:50,737 INFO L225 Difference]: With dead ends: 219 [2021-11-13 01:30:50,737 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 01:30:50,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:30:50,739 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 985.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.83ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1086.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:50,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1517 Invalid, 336 Unknown, 0 Unchecked, 5.83ms Time], IncrementalHoareTripleChecker [55 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 1086.53ms Time] [2021-11-13 01:30:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 01:30:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2021-11-13 01:30:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 93 states have internal predecessors, (108), 60 states have call successors, (60), 12 states have call predecessors, (60), 14 states have return successors, (67), 63 states have call predecessors, (67), 58 states have call successors, (67) [2021-11-13 01:30:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 235 transitions. [2021-11-13 01:30:50,759 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 235 transitions. Word has length 88 [2021-11-13 01:30:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:50,760 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 235 transitions. [2021-11-13 01:30:50,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-13 01:30:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 235 transitions. [2021-11-13 01:30:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 01:30:50,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:50,763 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2021-11-13 01:30:50,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-13 01:30:51,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:51,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:51,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:51,379 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash -522577770, now seen corresponding path program 1 times [2021-11-13 01:30:51,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:51,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646852494] [2021-11-13 01:30:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:51,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:51,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:51,385 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:51,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_912f25b2-4205-4a3c-b2c1-a05a10286290/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:32:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:42,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:32:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:43,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 79 [2021-11-13 01:32:50,273 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ BitVec 64)) (|v_save_byte_from_array_#in~storage#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|save_byte_from_array_nondet_size_t_#res#1| (_ BitVec 64))) (let ((.cse0 (select |c_#memory_int| |v_save_byte_from_array_#in~storage#1.base_BEFORE_CALL_1|))) (and (= ((_ extract 39 32) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd (_ bv4 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|))) (= (select .cse0 (bvadd (_ bv1 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) ((_ extract 15 8) |save_byte_from_array_nondet_size_t_#res#1|)) (= ((_ extract 31 24) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd (_ bv3 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|))) (= ((_ extract 7 0) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) (= ((_ extract 55 48) |save_byte_from_array_nondet_size_t_#res#1|) (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv6 64)))) (= (select .cse0 (bvadd (_ bv2 64) |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1|)) ((_ extract 23 16) |save_byte_from_array_nondet_size_t_#res#1|)) (= (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv5 64))) ((_ extract 47 40) |save_byte_from_array_nondet_size_t_#res#1|)) (= (select .cse0 (bvadd |v_save_byte_from_array_#in~storage#1.offset_BEFORE_CALL_1| (_ bv7 64))) ((_ extract 63 56) |save_byte_from_array_nondet_size_t_#res#1|))))) is different from true [2021-11-13 01:34:23,332 WARN L227 SmtUtils]: Spent 1.40m on a formula simplification. DAG size of input: 242 DAG size of output: 71 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:34:23,344 INFO L354 Elim1Store]: treesize reduction 592, result has 20.0 percent of original size [2021-11-13 01:34:23,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 158 treesize of output 208