./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_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_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/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_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/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_a6d86e24-cdb0-4376-bae6-706262991cd3/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 e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:30:22,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:30:22,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:30:22,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:30:22,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:30:22,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:30:22,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:30:22,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:30:22,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:30:22,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:30:22,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:30:22,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:30:22,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:30:22,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:30:22,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:30:22,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:30:22,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:30:22,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:30:22,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:30:22,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:30:22,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:30:22,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:30:22,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:30:22,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:30:22,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:30:22,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:30:22,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:30:22,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:30:22,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:30:22,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:30:22,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:30:22,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:30:22,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:30:22,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:30:22,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:30:22,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:30:22,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:30:22,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:30:22,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:30:22,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:30:22,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:30:22,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:30:22,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:30:22,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:30:22,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:30:22,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:30:22,120 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:30:22,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:30:22,120 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:30:22,120 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:30:22,121 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:30:22,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:30:22,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:30:22,121 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:30:22,121 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:30:22,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:30:22,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:30:22,122 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:30:22,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:30:22,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:30:22,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:30:22,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:30:22,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:30:22,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:30:22,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:30:22,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:30:22,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:30:22,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:30:22,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:30:22,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:30:22,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:30:22,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:30:22,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:30:22,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:30:22,126 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:30:22,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:30:22,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:30:22,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:30:22,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:30:22,127 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_a6d86e24-cdb0-4376-bae6-706262991cd3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 [2021-11-13 02:30:22,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:30:22,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:30:22,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:30:22,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:30:22,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:30:22,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-13 02:30:22,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/387eab9b7/19190dd2a39b4a95a6f00c98ad74d737/FLAG0a9f6b6ff [2021-11-13 02:30:23,449 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:30:23,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-13 02:30:23,494 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/387eab9b7/19190dd2a39b4a95a6f00c98ad74d737/FLAG0a9f6b6ff [2021-11-13 02:30:23,872 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/387eab9b7/19190dd2a39b4a95a6f00c98ad74d737 [2021-11-13 02:30:23,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:30:23,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:30:23,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:30:23,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:30:23,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:30:23,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:30:23" (1/1) ... [2021-11-13 02:30:23,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb3dacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:23, skipping insertion in model container [2021-11-13 02:30:23,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:30:23" (1/1) ... [2021-11-13 02:30:23,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:30:24,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:30:24,366 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-13 02:30:24,373 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-13 02:30:24,397 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:30:24,402 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:30:25,601 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,608 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,609 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,610 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,612 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,631 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,636 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:25,637 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:26,086 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:30:26,088 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:30:26,089 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:30:26,091 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:30:26,092 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:30:26,095 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:30:26,095 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:30:26,096 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:30:26,097 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:30:26,098 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:30:26,287 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:30:26,393 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:26,394 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:26,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:30:26,523 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:30:26,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27bcc6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:26, skipping insertion in model container [2021-11-13 02:30:26,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:30:26,527 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:30:26,529 INFO L158 Benchmark]: Toolchain (without parser) took 2646.54ms. Allocated memory is still 100.7MB. Free memory was 53.1MB in the beginning and 48.5MB in the end (delta: 4.6MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. [2021-11-13 02:30:26,530 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:30:26,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2639.99ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 48.5MB in the end (delta: 4.4MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. [2021-11-13 02:30:26,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2639.99ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 48.5MB in the end (delta: 4.4MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6984]: 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_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/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_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/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_a6d86e24-cdb0-4376-bae6-706262991cd3/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 e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:30:28,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:30:28,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:30:28,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:30:28,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:30:28,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:30:28,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:30:28,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:30:28,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:30:28,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:30:28,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:30:28,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:30:28,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:30:28,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:30:28,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:30:28,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:30:28,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:30:28,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:30:28,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:30:28,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:30:28,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:30:28,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:30:28,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:30:28,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:30:28,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:30:28,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:30:28,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:30:28,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:30:28,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:30:28,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:30:28,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:30:28,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:30:28,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:30:28,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:30:28,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:30:28,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:30:28,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:30:28,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:30:28,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:30:28,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:30:28,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:30:28,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:30:28,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:30:28,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:30:28,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:30:28,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:30:28,885 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:30:28,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:30:28,886 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:30:28,886 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:30:28,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:30:28,886 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:30:28,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:30:28,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:30:28,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:30:28,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:30:28,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:30:28,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:30:28,890 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:30:28,891 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:30:28,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:30:28,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:30:28,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:30:28,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:30:28,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:30:28,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:30:28,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:30:28,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:30:28,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:30:28,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:30:28,893 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:30:28,894 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:28,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:30:28,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:30:28,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:30:28,895 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_a6d86e24-cdb0-4376-bae6-706262991cd3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 [2021-11-13 02:30:29,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:30:29,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:30:29,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:30:29,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:30:29,335 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:30:29,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-13 02:30:29,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/106febc3b/36bdabb23c1c4c95bf178b22929d4496/FLAGe24784991 [2021-11-13 02:30:30,402 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:30:30,403 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-13 02:30:30,447 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/106febc3b/36bdabb23c1c4c95bf178b22929d4496/FLAGe24784991 [2021-11-13 02:30:30,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/data/106febc3b/36bdabb23c1c4c95bf178b22929d4496 [2021-11-13 02:30:30,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:30:30,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:30:30,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:30:30,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:30:30,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:30:30,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:30:30" (1/1) ... [2021-11-13 02:30:30,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd0c14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:30, skipping insertion in model container [2021-11-13 02:30:30,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:30:30" (1/1) ... [2021-11-13 02:30:30,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:30:31,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:30:31,365 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-13 02:30:31,372 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-13 02:30:31,396 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:30:31,402 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:30:32,385 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,394 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,395 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,396 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,397 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,412 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,412 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,414 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,415 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:32,891 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:30:32,894 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:30:32,896 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:30:32,898 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:30:32,906 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:30:32,908 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:30:32,911 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:30:32,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:30:32,917 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:30:32,918 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:30:33,140 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:30:33,263 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,263 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:30:33,441 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:30:33,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:30:33,520 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-13 02:30:33,521 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-13 02:30:33,523 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:30:33,526 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:30:33,578 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,579 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,584 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,584 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,594 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,595 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,596 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,621 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,695 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:30:33,696 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:30:33,697 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:30:33,698 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:30:33,700 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:30:33,701 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:30:33,702 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:30:33,702 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:30:33,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:30:33,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:30:33,739 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:30:33,812 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,813 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:33,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:30:33,865 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:30:33,934 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-13 02:30:33,935 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_a6d86e24-cdb0-4376-bae6-706262991cd3/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-13 02:30:33,938 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:30:33,938 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:30:34,013 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,015 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,015 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,022 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,023 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,023 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,065 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:30:34,066 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:30:34,067 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:30:34,068 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:30:34,068 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:30:34,069 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:30:34,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:30:34,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:30:34,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:30:34,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:30:34,093 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:30:34,259 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:30:34,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:30:34,623 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:30:34,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34 WrapperNode [2021-11-13 02:30:34,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:30:34,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:30:34,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:30:34,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:30:34,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:34,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:34,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:30:34,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:30:34,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:30:34,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:30:34,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:34,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:34,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:34,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:35,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:35,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:35,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:35,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:30:35,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:30:35,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:30:35,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:30:35,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (1/1) ... [2021-11-13 02:30:35,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:30:35,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:30:35,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:30:35,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:30:35,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-13 02:30:35,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-13 02:30:35,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:30:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-13 02:30:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-13 02:30:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:30:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:30:35,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:30:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:30:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-11-13 02:30:35,175 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-11-13 02:30:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:30:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:30:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:30:35,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:30:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 02:30:35,176 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 02:30:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:30:35,177 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-13 02:30:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-13 02:30:35,177 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:30:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:30:35,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:30:35,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:30:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:30:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:30:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:30:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-13 02:30:35,179 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-13 02:30:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-13 02:30:35,179 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-13 02:30:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-13 02:30:35,179 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-13 02:30:49,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:30:49,186 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:30:49,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:30:49 BoogieIcfgContainer [2021-11-13 02:30:49,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:30:49,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:30:49,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:30:49,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:30:49,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:30:30" (1/3) ... [2021-11-13 02:30:49,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ee242b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:30:49, skipping insertion in model container [2021-11-13 02:30:49,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:30:34" (2/3) ... [2021-11-13 02:30:49,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ee242b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:30:49, skipping insertion in model container [2021-11-13 02:30:49,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:30:49" (3/3) ... [2021-11-13 02:30:49,197 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_secure_harness.i [2021-11-13 02:30:49,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:30:49,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:30:49,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:30:49,258 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:30:49,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:30:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 02:30:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 02:30:49,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:49,287 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:49,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1424840205, now seen corresponding path program 1 times [2021-11-13 02:30:49,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:49,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130250386] [2021-11-13 02:30:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:49,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:49,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:49,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:30:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:53,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:30:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:30:53,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:30:53,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130250386] [2021-11-13 02:30:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130250386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:30:53,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:30:53,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:30:53,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019562791] [2021-11-13 02:30:53,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:53,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:30:53,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:30:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:30:53,847 INFO L87 Difference]: Start difference. First operand has 119 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:30:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:53,912 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2021-11-13 02:30:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:30:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 77 [2021-11-13 02:30:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:53,925 INFO L225 Difference]: With dead ends: 234 [2021-11-13 02:30:53,925 INFO L226 Difference]: Without dead ends: 114 [2021-11-13 02:30:53,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:30:53,933 INFO L933 BasicCegarLoop]: 150 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, 150 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:53,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:30:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-13 02:30:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-13 02:30:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.2) internal successors, (90), 76 states have internal predecessors, (90), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 02:30:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-11-13 02:30:53,982 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 77 [2021-11-13 02:30:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:53,983 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-11-13 02:30:53,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:30:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-11-13 02:30:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 02:30:53,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:53,988 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:54,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:54,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:54,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:54,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1664499927, now seen corresponding path program 1 times [2021-11-13 02:30:54,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:54,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772148123] [2021-11-13 02:30:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:54,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:54,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:54,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:30:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:30:58,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:30:58,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:30:59,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:59,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772148123] [2021-11-13 02:30:59,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772148123] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:30:59,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:30:59,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 02:30:59,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732961054] [2021-11-13 02:30:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:59,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:30:59,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:30:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:30:59,357 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:30:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:59,601 INFO L93 Difference]: Finished difference Result 206 states and 269 transitions. [2021-11-13 02:30:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:30:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-11-13 02:30:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:59,607 INFO L225 Difference]: With dead ends: 206 [2021-11-13 02:30:59,607 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 02:30:59,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:30:59,610 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 39 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.46ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:59,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 462 Invalid, 55 Unknown, 0 Unchecked, 6.92ms Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 207.46ms Time] [2021-11-13 02:30:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 02:30:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-13 02:30:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 79 states have internal predecessors, (92), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2021-11-13 02:30:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2021-11-13 02:30:59,640 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 77 [2021-11-13 02:30:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:59,641 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2021-11-13 02:30:59,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:30:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2021-11-13 02:30:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 02:30:59,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:59,656 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:59,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:59,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:59,871 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1289533548, now seen corresponding path program 1 times [2021-11-13 02:30:59,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:59,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153738477] [2021-11-13 02:30:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:59,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:59,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:59,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:59,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:31:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:31:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:04,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 02:31:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:31:05,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:06,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-13 02:31:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:31:06,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:06,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153738477] [2021-11-13 02:31:06,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153738477] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:06,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:06,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-13 02:31:06,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228102684] [2021-11-13 02:31:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:06,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:31:06,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:31:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:31:06,776 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-13 02:31:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:06,991 INFO L93 Difference]: Finished difference Result 229 states and 299 transitions. [2021-11-13 02:31:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:31:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 83 [2021-11-13 02:31:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:06,997 INFO L225 Difference]: With dead ends: 229 [2021-11-13 02:31:06,998 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 02:31:06,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:07,000 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 26 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.07ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 111.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:07,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 875 Invalid, 124 Unknown, 0 Unchecked, 8.07ms Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 94 Unchecked, 111.17ms Time] [2021-11-13 02:31:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 02:31:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 02:31:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2021-11-13 02:31:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 168 transitions. [2021-11-13 02:31:07,018 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 168 transitions. Word has length 83 [2021-11-13 02:31:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:07,019 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 168 transitions. [2021-11-13 02:31:07,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-13 02:31:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 168 transitions. [2021-11-13 02:31:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 02:31:07,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:07,022 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:07,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:07,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:07,226 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash 976847638, now seen corresponding path program 1 times [2021-11-13 02:31:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:07,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762389422] [2021-11-13 02:31:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:07,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:07,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:07,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:31:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:31:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:31:11,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 02:31:11,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:11,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762389422] [2021-11-13 02:31:11,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762389422] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:11,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:11,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 02:31:11,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070159349] [2021-11-13 02:31:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:11,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:31:11,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:31:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:31:11,584 INFO L87 Difference]: Start difference. First operand 130 states and 168 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:31:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:11,660 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2021-11-13 02:31:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:31:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 83 [2021-11-13 02:31:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:11,663 INFO L225 Difference]: With dead ends: 232 [2021-11-13 02:31:11,663 INFO L226 Difference]: Without dead ends: 136 [2021-11-13 02:31:11,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:31:11,665 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 20 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:11,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 427 Invalid, 16 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 50.14ms Time] [2021-11-13 02:31:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-13 02:31:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2021-11-13 02:31:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 85 states have internal predecessors, (101), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2021-11-13 02:31:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2021-11-13 02:31:11,681 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 83 [2021-11-13 02:31:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:11,681 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2021-11-13 02:31:11,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:31:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2021-11-13 02:31:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 02:31:11,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:11,683 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:11,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-13 02:31:11,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:11,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash -217649380, now seen corresponding path program 1 times [2021-11-13 02:31:11,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:11,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531602639] [2021-11-13 02:31:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:11,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:11,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:31:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:31:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:31:16,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 02:31:17,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:17,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531602639] [2021-11-13 02:31:17,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531602639] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:17,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:17,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-13 02:31:17,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812150553] [2021-11-13 02:31:17,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:17,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:31:17,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:17,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:31:17,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:31:17,242 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:31:19,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:21,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:23,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:24,415 INFO L93 Difference]: Finished difference Result 238 states and 324 transitions. [2021-11-13 02:31:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:31:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-11-13 02:31:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:24,419 INFO L225 Difference]: With dead ends: 238 [2021-11-13 02:31:24,420 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 02:31:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:31:24,421 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 42 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6812.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 7003.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:24,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 525 Invalid, 97 Unknown, 0 Unchecked, 4.69ms Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 2 Unknown, 31 Unchecked, 7003.95ms Time] [2021-11-13 02:31:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 02:31:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2021-11-13 02:31:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 94 states have internal predecessors, (113), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2021-11-13 02:31:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-11-13 02:31:24,437 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 87 [2021-11-13 02:31:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:24,438 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-11-13 02:31:24,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:31:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-11-13 02:31:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 02:31:24,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:24,440 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:24,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-13 02:31:24,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:24,654 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1320690650, now seen corresponding path program 1 times [2021-11-13 02:31:24,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:24,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869986651] [2021-11-13 02:31:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:24,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:24,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:24,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:24,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:31:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:31:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 02:31:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 02:31:32,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:32,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869986651] [2021-11-13 02:31:32,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869986651] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:32,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:32,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-13 02:31:32,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634994461] [2021-11-13 02:31:32,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:32,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:31:32,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:31:32,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:31:32,705 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:31:34,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:36,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:41,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:42,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:43,280 INFO L93 Difference]: Finished difference Result 246 states and 337 transitions. [2021-11-13 02:31:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:31:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2021-11-13 02:31:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:43,285 INFO L225 Difference]: With dead ends: 246 [2021-11-13 02:31:43,286 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 02:31:43,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:31:43,288 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 38 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8632.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 8892.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:43,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1338 Invalid, 458 Unknown, 0 Unchecked, 9.03ms Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 3 Unknown, 250 Unchecked, 8892.18ms Time] [2021-11-13 02:31:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 02:31:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2021-11-13 02:31:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 96 states have internal predecessors, (113), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2021-11-13 02:31:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 173 transitions. [2021-11-13 02:31:43,304 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 173 transitions. Word has length 87 [2021-11-13 02:31:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:43,304 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 173 transitions. [2021-11-13 02:31:43,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:31:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 173 transitions. [2021-11-13 02:31:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 02:31:43,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:43,306 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:43,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:43,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:43,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1043267870, now seen corresponding path program 1 times [2021-11-13 02:31:43,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:43,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886803449] [2021-11-13 02:31:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:43,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:43,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:43,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:43,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:31:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:31:47,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:31:47,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 02:31:47,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:47,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886803449] [2021-11-13 02:31:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886803449] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:47,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:47,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 02:31:47,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439565210] [2021-11-13 02:31:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:47,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:31:47,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:31:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:31:47,840 INFO L87 Difference]: Start difference. First operand 135 states and 173 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:31:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:47,927 INFO L93 Difference]: Finished difference Result 244 states and 321 transitions. [2021-11-13 02:31:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:31:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-11-13 02:31:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:47,931 INFO L225 Difference]: With dead ends: 244 [2021-11-13 02:31:47,931 INFO L226 Difference]: Without dead ends: 139 [2021-11-13 02:31:47,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:31:47,933 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 34 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:47,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 418 Invalid, 13 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 58.36ms Time] [2021-11-13 02:31:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-13 02:31:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2021-11-13 02:31:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.164835164835165) internal successors, (106), 92 states have internal predecessors, (106), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2021-11-13 02:31:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2021-11-13 02:31:47,947 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 87 [2021-11-13 02:31:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:47,947 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2021-11-13 02:31:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:31:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2021-11-13 02:31:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 02:31:47,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:47,949 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:48,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:48,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:48,174 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1864914016, now seen corresponding path program 1 times [2021-11-13 02:31:48,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:48,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123558624] [2021-11-13 02:31:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:48,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:48,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:48,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:31:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:31:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 02:31:52,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 02:31:52,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:52,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123558624] [2021-11-13 02:31:52,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123558624] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:52,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:52,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-13 02:31:52,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872687247] [2021-11-13 02:31:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:31:52,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:31:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:31:52,870 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:31:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:53,362 INFO L93 Difference]: Finished difference Result 244 states and 319 transitions. [2021-11-13 02:31:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:31:53,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2021-11-13 02:31:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:53,365 INFO L225 Difference]: With dead ends: 244 [2021-11-13 02:31:53,365 INFO L226 Difference]: Without dead ends: 141 [2021-11-13 02:31:53,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:31:53,367 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 12 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 325.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.52ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:53,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1015 Invalid, 132 Unknown, 0 Unchecked, 4.52ms Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 375.14ms Time] [2021-11-13 02:31:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-13 02:31:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2021-11-13 02:31:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.164835164835165) internal successors, (106), 92 states have internal predecessors, (106), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (32), 27 states have call predecessors, (32), 27 states have call successors, (32) [2021-11-13 02:31:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2021-11-13 02:31:53,381 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 87 [2021-11-13 02:31:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:53,382 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2021-11-13 02:31:53,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:31:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2021-11-13 02:31:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:31:53,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:53,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:53,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:53,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:53,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1458918715, now seen corresponding path program 1 times [2021-11-13 02:31:53,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:53,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995026117] [2021-11-13 02:31:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:53,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:53,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:53,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:31:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:31:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:31:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:31:58,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:58,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995026117] [2021-11-13 02:31:58,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995026117] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:58,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:58,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 02:31:58,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076080254] [2021-11-13 02:31:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:58,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:31:58,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:58,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:31:58,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:31:58,139 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:31:58,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:58,363 INFO L93 Difference]: Finished difference Result 234 states and 301 transitions. [2021-11-13 02:31:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:31:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2021-11-13 02:31:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:58,367 INFO L225 Difference]: With dead ends: 234 [2021-11-13 02:31:58,367 INFO L226 Difference]: Without dead ends: 134 [2021-11-13 02:31:58,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:31:58,369 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 54 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:58,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 475 Invalid, 66 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [25 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 190.22ms Time] [2021-11-13 02:31:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-13 02:31:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-13 02:31:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 95 states have internal predecessors, (108), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (35), 27 states have call predecessors, (35), 27 states have call successors, (35) [2021-11-13 02:31:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 171 transitions. [2021-11-13 02:31:58,380 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 171 transitions. Word has length 89 [2021-11-13 02:31:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:58,380 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 171 transitions. [2021-11-13 02:31:58,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 02:31:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 171 transitions. [2021-11-13 02:31:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 02:31:58,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:58,382 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:58,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:58,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:58,600 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1307369168, now seen corresponding path program 1 times [2021-11-13 02:31:58,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:58,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684751843] [2021-11-13 02:31:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:58,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:58,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:58,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:58,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:32:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:02,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 02:32:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 55 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 02:32:05,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:19,149 WARN L227 SmtUtils]: Spent 10.98s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:32:19,156 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-13 02:32:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771 [2021-11-13 02:40:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 02:40:45,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:45,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684751843] [2021-11-13 02:40:45,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684751843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:45,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1542999541] [2021-11-13 02:40:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:45,427 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:45,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:40:45,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:40:45,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 02:40:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:40:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:40:48,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 02:40:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1542999541] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:48,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:40:48,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10, 8] total 24 [2021-11-13 02:40:48,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982032429] [2021-11-13 02:40:48,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:48,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:40:48,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:40:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:40:48,655 INFO L87 Difference]: Start difference. First operand 134 states and 171 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-13 02:40:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:49,448 INFO L93 Difference]: Finished difference Result 232 states and 295 transitions. [2021-11-13 02:40:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:40:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2021-11-13 02:40:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:49,452 INFO L225 Difference]: With dead ends: 232 [2021-11-13 02:40:49,452 INFO L226 Difference]: Without dead ends: 134 [2021-11-13 02:40:49,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:40:49,454 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 70 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 480.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 527.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:49,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 814 Invalid, 125 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [33 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 527.15ms Time] [2021-11-13 02:40:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-13 02:40:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-13 02:40:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 95 states have internal predecessors, (108), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2021-11-13 02:40:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2021-11-13 02:40:49,464 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 95 [2021-11-13 02:40:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:49,465 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2021-11-13 02:40:49,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-13 02:40:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2021-11-13 02:40:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 02:40:49,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:49,467 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:49,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:49,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-13 02:40:49,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:49,886 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 755211078, now seen corresponding path program 1 times [2021-11-13 02:40:49,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:49,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236022356] [2021-11-13 02:40:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:49,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:49,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:49,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d86e24-cdb0-4376-bae6-706262991cd3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:40:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 02:40:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 79 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:40:56,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:11,329 WARN L227 SmtUtils]: Spent 11.71s on a formula simplification. DAG size of input: 526 DAG size of output: 272 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:41:11,332 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-13 02:41:11,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 132 treesize of output 771