./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs --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 e695a989d07c92d21e9a41b59ca742c73a2098242f3cafca723523a39a7793cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:35,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:35,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:36,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:36,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:36,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:36,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:36,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:36,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:36,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:36,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:36,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:36,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:36,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:36,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:36,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:36,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:36,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:36,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:36,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:36,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:36,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:36,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:36,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:36,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:36,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:36,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:36,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:36,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:36,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:36,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:36,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:36,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:36,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:36,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:36,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:36,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:36,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:36,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:36,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:36,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:36,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:37:36,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:36,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:36,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:36,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:36,184 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:36,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:36,184 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:36,184 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:37:36,191 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:36,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:36,192 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:37:36,192 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:37:36,192 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:36,193 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:37:36,193 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:37:36,193 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:37:36,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:36,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:37:36,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:36,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:36,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:36,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:36,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:36,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:36,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:36,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:36,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:36,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:36,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:36,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:36,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:36,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:36,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:37:36,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:37:36,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:36,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:36,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:36,199 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e695a989d07c92d21e9a41b59ca742c73a2098242f3cafca723523a39a7793cb [2021-11-19 13:37:36,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:36,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:36,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:36,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:36,579 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:36,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i [2021-11-19 13:37:36,647 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/3923bf5f6/cbb2360f725e43449d4b2873f6f3ba17/FLAG2ba62c557 [2021-11-19 13:37:37,610 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:37,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i [2021-11-19 13:37:37,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/3923bf5f6/cbb2360f725e43449d4b2873f6f3ba17/FLAG2ba62c557 [2021-11-19 13:37:38,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/3923bf5f6/cbb2360f725e43449d4b2873f6f3ba17 [2021-11-19 13:37:38,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:38,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:38,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:38,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:38,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:38,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:38" (1/1) ... [2021-11-19 13:37:38,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c11fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:38, skipping insertion in model container [2021-11-19 13:37:38,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:38" (1/1) ... [2021-11-19 13:37:38,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:38,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:38,433 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4497,4510] [2021-11-19 13:37:38,443 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4557,4570] [2021-11-19 13:37:38,472 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:37:38,478 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:37:39,508 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,509 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,510 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,511 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,512 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,541 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,545 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,548 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:39,548 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:40,010 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:37:40,012 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:37:40,013 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:37:40,016 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:37:40,018 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:37:40,021 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:37:40,022 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:37:40,024 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:37:40,027 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:37:40,030 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:37:40,245 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:37:40,400 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:40,401 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:40,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:40,567 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) [2021-11-19 13:37:40,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7bd0c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:40, skipping insertion in model container [2021-11-19 13:37:40,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:40,568 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:37:40,571 INFO L158 Benchmark]: Toolchain (without parser) took 2565.18ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 52.2MB in the end (delta: 28.0MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2021-11-19 13:37:40,571 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory is still 60.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:37:40,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2562.09ms. Allocated memory is still 102.8MB. Free memory was 79.9MB in the beginning and 52.2MB in the end (delta: 27.7MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2021-11-19 13:37:40,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory is still 60.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2562.09ms. Allocated memory is still 102.8MB. Free memory was 79.9MB in the beginning and 52.2MB in the end (delta: 27.7MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs --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 e695a989d07c92d21e9a41b59ca742c73a2098242f3cafca723523a39a7793cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:42,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:42,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:42,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:42,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:42,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:42,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:42,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:42,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:42,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:42,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:42,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:42,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:42,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:42,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:42,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:42,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:42,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:42,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:42,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:42,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:42,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:42,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:42,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:42,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:42,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:42,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:42,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:42,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:42,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:42,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:42,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:42,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:42,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:42,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:42,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:42,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:42,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:42,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:42,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:42,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:42,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:37:43,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:43,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:43,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:43,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:43,006 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:43,006 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:43,007 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:43,007 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:43,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:43,007 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:43,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:43,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:43,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:43,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:43,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:43,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:43,011 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:37:43,011 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:37:43,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:43,011 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:43,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:43,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:43,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:37:43,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:43,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:43,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:43,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:43,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:43,013 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:37:43,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:43,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:43,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:43,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:43,014 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e695a989d07c92d21e9a41b59ca742c73a2098242f3cafca723523a39a7793cb [2021-11-19 13:37:43,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:43,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:43,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:43,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:43,488 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:43,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i [2021-11-19 13:37:43,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/f2a4fb747/2c5d0b38d548427dadc6607bf5621524/FLAG2039f8146 [2021-11-19 13:37:44,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:44,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i [2021-11-19 13:37:44,514 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/f2a4fb747/2c5d0b38d548427dadc6607bf5621524/FLAG2039f8146 [2021-11-19 13:37:44,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/data/f2a4fb747/2c5d0b38d548427dadc6607bf5621524 [2021-11-19 13:37:44,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:44,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:44,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:44,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:44,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:44,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:44" (1/1) ... [2021-11-19 13:37:44,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c6641b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:44, skipping insertion in model container [2021-11-19 13:37:44,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:44" (1/1) ... [2021-11-19 13:37:44,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:45,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:45,449 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4497,4510] [2021-11-19 13:37:45,456 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4557,4570] [2021-11-19 13:37:45,482 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:37:45,488 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:37:46,685 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,686 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,688 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,689 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,691 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,713 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,716 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,719 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:46,719 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,163 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:37:47,165 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:37:47,166 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:37:47,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:37:47,171 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:37:47,171 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:37:47,172 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:37:47,173 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:37:47,174 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:37:47,174 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:37:47,350 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:37:47,535 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,540 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,668 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:47,744 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:37:47,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:47,801 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4497,4510] [2021-11-19 13:37:47,801 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4557,4570] [2021-11-19 13:37:47,803 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:37:47,806 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:37:47,883 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,884 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,884 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,885 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,885 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,903 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,904 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,905 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,905 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:47,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:37:47,954 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:37:47,954 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:37:47,955 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:37:47,956 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:37:47,956 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:37:47,957 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:37:47,957 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:37:47,958 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:37:47,958 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:37:47,983 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:37:48,077 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,078 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,144 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:48,191 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:37:48,215 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4497,4510] [2021-11-19 13:37:48,216 WARN L230 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_86cf87c6-3e75-4772-ae00-7a24491d7fdd/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_be64_harness.i[4557,4570] [2021-11-19 13:37:48,217 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:37:48,218 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:37:48,261 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,262 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,262 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,262 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,263 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,269 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,269 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,270 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,270 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,301 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:37:48,302 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:37:48,325 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:37:48,326 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:37:48,327 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:37:48,327 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:37:48,328 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:37:48,329 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:37:48,329 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:37:48,330 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:37:48,353 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:37:48,426 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,427 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:37:48,463 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:48,904 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:37:48,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48 WrapperNode [2021-11-19 13:37:48,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:48,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:48,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:37:48,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:37:48,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,227 INFO L137 Inliner]: procedures = 713, calls = 2621, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 858 [2021-11-19 13:37:49,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:49,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:37:49,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:37:49,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:37:49,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:37:49,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:37:49,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:37:49,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:37:49,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (1/1) ... [2021-11-19 13:37:49,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:49,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:49,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:37:49,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:37:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure htonl [2021-11-19 13:37:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hton64 [2021-11-19 13:37:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hton64 [2021-11-19 13:37:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 13:37:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 13:37:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:37:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 13:37:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 13:37:49,465 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 13:37:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:37:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:37:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 13:37:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:37:49,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:37:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:37:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:37:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:37:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-19 13:37:49,466 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-19 13:37:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:37:49,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:37:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 13:37:49,467 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 13:37:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:37:49,467 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 13:37:49,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 13:37:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:37:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:37:49,468 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:37:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-19 13:37:49,468 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-19 13:37:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:37:49,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:37:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-19 13:37:49,469 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-19 13:37:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:37:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:37:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:37:49,469 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 13:37:49,470 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 13:37:49,470 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_big_endian [2021-11-19 13:37:49,470 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_big_endian [2021-11-19 13:37:49,888 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:37:49,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:37:53,902 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:37:53,912 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:37:53,913 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:37:53,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:37:53 BoogieIcfgContainer [2021-11-19 13:37:53,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:37:53,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:37:53,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:37:53,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:37:53,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:37:44" (1/3) ... [2021-11-19 13:37:53,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72458e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:37:53, skipping insertion in model container [2021-11-19 13:37:53,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:48" (2/3) ... [2021-11-19 13:37:53,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72458e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:37:53, skipping insertion in model container [2021-11-19 13:37:53,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:37:53" (3/3) ... [2021-11-19 13:37:53,930 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_be64_harness.i [2021-11-19 13:37:53,939 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:37:53,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:37:53,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:37:54,005 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 [2021-11-19 13:37:54,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:37:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 92 states have internal predecessors, (112), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-19 13:37:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 13:37:54,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:54,044 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:54,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1121284751, now seen corresponding path program 1 times [2021-11-19 13:37:54,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:54,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826675629] [2021-11-19 13:37:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:54,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:54,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:54,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:37:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:37:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:37:55,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 13:37:55,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:55,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826675629] [2021-11-19 13:37:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826675629] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:55,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:55,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 13:37:55,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673076670] [2021-11-19 13:37:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:55,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:37:55,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:37:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:37:55,784 INFO L87 Difference]: Start difference. First operand has 141 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 92 states have internal predecessors, (112), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:37:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:55,834 INFO L93 Difference]: Finished difference Result 278 states and 389 transitions. [2021-11-19 13:37:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:37:55,840 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 95 [2021-11-19 13:37:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:55,850 INFO L225 Difference]: With dead ends: 278 [2021-11-19 13:37:55,851 INFO L226 Difference]: Without dead ends: 136 [2021-11-19 13:37:55,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:37:55,859 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:55,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:37:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-19 13:37:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-11-19 13:37:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 87 states have (on average 1.206896551724138) internal successors, (105), 88 states have internal predecessors, (105), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-19 13:37:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2021-11-19 13:37:55,914 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 95 [2021-11-19 13:37:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:55,915 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2021-11-19 13:37:55,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:37:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2021-11-19 13:37:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 13:37:55,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:55,922 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:55,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:56,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:56,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2046073213, now seen corresponding path program 1 times [2021-11-19 13:37:56,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:56,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494658114] [2021-11-19 13:37:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:56,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:56,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:56,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:37:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:37:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:37:57,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 13:37:57,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:57,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494658114] [2021-11-19 13:37:57,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494658114] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:57,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:57,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 13:37:57,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406998156] [2021-11-19 13:37:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:57,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:37:57,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:37:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:37:57,944 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:37:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:58,208 INFO L93 Difference]: Finished difference Result 250 states and 331 transitions. [2021-11-19 13:37:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:37:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 95 [2021-11-19 13:37:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:58,213 INFO L225 Difference]: With dead ends: 250 [2021-11-19 13:37:58,213 INFO L226 Difference]: Without dead ends: 139 [2021-11-19 13:37:58,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:37:58,216 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 48 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:58,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 434 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:37:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-19 13:37:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-19 13:37:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 36 states have call successors, (36), 12 states have call predecessors, (36), 13 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-11-19 13:37:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2021-11-19 13:37:58,238 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 95 [2021-11-19 13:37:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:58,239 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2021-11-19 13:37:58,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:37:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2021-11-19 13:37:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 13:37:58,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:58,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:58,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:58,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:58,466 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash 418674190, now seen corresponding path program 1 times [2021-11-19 13:37:58,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:58,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427982238] [2021-11-19 13:37:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:58,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:58,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:58,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:37:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:37:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:59,732 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 [2021-11-19 13:38:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:38:00,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:01,659 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 [2021-11-19 13:38:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 13:38:01,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:01,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427982238] [2021-11-19 13:38:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427982238] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:01,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:01,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-19 13:38:01,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210129164] [2021-11-19 13:38:01,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:01,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:38:01,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:38:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:38:01,967 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 13:38:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:02,293 INFO L93 Difference]: Finished difference Result 273 states and 359 transitions. [2021-11-19 13:38:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:38:02,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 101 [2021-11-19 13:38:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:02,297 INFO L225 Difference]: With dead ends: 273 [2021-11-19 13:38:02,297 INFO L226 Difference]: Without dead ends: 152 [2021-11-19 13:38:02,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:38:02,299 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 34 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:02,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 811 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2021-11-19 13:38:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-19 13:38:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-19 13:38:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 103 states have internal predecessors, (122), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-11-19 13:38:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2021-11-19 13:38:02,318 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 101 [2021-11-19 13:38:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:02,319 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2021-11-19 13:38:02,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 13:38:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2021-11-19 13:38:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 13:38:02,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:02,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:02,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:02,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:02,554 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:02,554 INFO L85 PathProgramCache]: Analyzing trace with hash -73951984, now seen corresponding path program 1 times [2021-11-19 13:38:02,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:02,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390188988] [2021-11-19 13:38:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:02,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:02,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:02,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:38:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:38:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 13:38:03,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:38:03,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:03,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390188988] [2021-11-19 13:38:03,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390188988] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:03,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:03,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 13:38:03,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332813461] [2021-11-19 13:38:03,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:03,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:38:03,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:38:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:03,992 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:38:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:04,049 INFO L93 Difference]: Finished difference Result 276 states and 371 transitions. [2021-11-19 13:38:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:38:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 101 [2021-11-19 13:38:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:04,052 INFO L225 Difference]: With dead ends: 276 [2021-11-19 13:38:04,052 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 13:38:04,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:38:04,054 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 20 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:04,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 520 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 13:38:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2021-11-19 13:38:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 97 states have internal predecessors, (116), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-11-19 13:38:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 191 transitions. [2021-11-19 13:38:04,071 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 191 transitions. Word has length 101 [2021-11-19 13:38:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:04,071 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 191 transitions. [2021-11-19 13:38:04,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:38:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2021-11-19 13:38:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 13:38:04,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:04,074 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:04,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:04,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:04,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:04,298 INFO L85 PathProgramCache]: Analyzing trace with hash -798646058, now seen corresponding path program 1 times [2021-11-19 13:38:04,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:04,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944651678] [2021-11-19 13:38:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:04,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:04,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:04,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:38:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1532 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:38:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 13:38:06,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:38:06,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:06,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944651678] [2021-11-19 13:38:06,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944651678] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:06,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:06,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 13:38:06,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642371127] [2021-11-19 13:38:06,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:06,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:38:06,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:38:06,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:38:06,718 INFO L87 Difference]: Start difference. First operand 146 states and 191 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:38:08,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:38:10,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:38:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:12,375 INFO L93 Difference]: Finished difference Result 282 states and 384 transitions. [2021-11-19 13:38:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:38:12,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-11-19 13:38:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:12,380 INFO L225 Difference]: With dead ends: 282 [2021-11-19 13:38:12,380 INFO L226 Difference]: Without dead ends: 166 [2021-11-19 13:38:12,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:38:12,382 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 42 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:12,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 610 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 2 Unknown, 42 Unchecked, 5.5s Time] [2021-11-19 13:38:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-19 13:38:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-11-19 13:38:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 106 states have internal predecessors, (128), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2021-11-19 13:38:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 203 transitions. [2021-11-19 13:38:12,398 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 203 transitions. Word has length 105 [2021-11-19 13:38:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:12,398 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 203 transitions. [2021-11-19 13:38:12,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:38:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 203 transitions. [2021-11-19 13:38:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 13:38:12,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:12,401 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:12,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:12,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:12,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1109811732, now seen corresponding path program 1 times [2021-11-19 13:38:12,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:12,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212923301] [2021-11-19 13:38:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:12,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:12,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:12,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:38:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 13:38:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:38:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 13:38:17,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:17,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212923301] [2021-11-19 13:38:17,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212923301] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:17,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:17,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 13:38:17,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602140547] [2021-11-19 13:38:17,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:17,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:38:17,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:17,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:38:17,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:38:17,263 INFO L87 Difference]: Start difference. First operand 155 states and 203 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:38:19,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:38:21,365 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:38:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:24,672 INFO L93 Difference]: Finished difference Result 290 states and 397 transitions. [2021-11-19 13:38:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:38:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 105 [2021-11-19 13:38:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:24,677 INFO L225 Difference]: With dead ends: 290 [2021-11-19 13:38:24,678 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 13:38:24,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:38:24,680 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 38 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:24,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1581 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 236 Invalid, 2 Unknown, 318 Unchecked, 6.0s Time] [2021-11-19 13:38:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 13:38:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-11-19 13:38:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 111 states have internal predecessors, (130), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (44), 35 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-19 13:38:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 210 transitions. [2021-11-19 13:38:24,697 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 210 transitions. Word has length 105 [2021-11-19 13:38:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:24,698 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 210 transitions. [2021-11-19 13:38:24,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:38:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 210 transitions. [2021-11-19 13:38:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 13:38:24,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:24,700 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:24,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 13:38:24,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:24,921 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash 935458392, now seen corresponding path program 1 times [2021-11-19 13:38:24,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:24,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097133086] [2021-11-19 13:38:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:24,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:24,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:24,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:38:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:38:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 13:38:26,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:38:26,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:26,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097133086] [2021-11-19 13:38:26,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097133086] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:26,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:26,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 13:38:26,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626022331] [2021-11-19 13:38:26,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:26,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:38:26,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:26,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:38:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:26,244 INFO L87 Difference]: Start difference. First operand 160 states and 210 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:38:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:26,315 INFO L93 Difference]: Finished difference Result 294 states and 395 transitions. [2021-11-19 13:38:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:38:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-11-19 13:38:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:26,317 INFO L225 Difference]: With dead ends: 294 [2021-11-19 13:38:26,318 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 13:38:26,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:38:26,320 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 34 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:26,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 511 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 13:38:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2021-11-19 13:38:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 107 states have internal predecessors, (123), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (44), 35 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-19 13:38:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 203 transitions. [2021-11-19 13:38:26,334 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 203 transitions. Word has length 105 [2021-11-19 13:38:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 203 transitions. [2021-11-19 13:38:26,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:38:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 203 transitions. [2021-11-19 13:38:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 13:38:26,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:26,336 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:26,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:26,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash -975584166, now seen corresponding path program 1 times [2021-11-19 13:38:26,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:26,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567811260] [2021-11-19 13:38:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:26,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:26,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:38:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:38:27,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:38:27,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 13:38:28,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:28,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567811260] [2021-11-19 13:38:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567811260] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:28,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:28,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 13:38:28,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659457623] [2021-11-19 13:38:28,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:28,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:38:28,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:38:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:38:28,095 INFO L87 Difference]: Start difference. First operand 156 states and 203 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:38:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:28,430 INFO L93 Difference]: Finished difference Result 293 states and 392 transitions. [2021-11-19 13:38:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:38:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 105 [2021-11-19 13:38:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:28,433 INFO L225 Difference]: With dead ends: 293 [2021-11-19 13:38:28,433 INFO L226 Difference]: Without dead ends: 165 [2021-11-19 13:38:28,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:38:28,435 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 12 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:28,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1261 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:38:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-19 13:38:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2021-11-19 13:38:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 107 states have internal predecessors, (123), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (44), 35 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-19 13:38:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 203 transitions. [2021-11-19 13:38:28,448 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 203 transitions. Word has length 105 [2021-11-19 13:38:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:28,449 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 203 transitions. [2021-11-19 13:38:28,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 13:38:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 203 transitions. [2021-11-19 13:38:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 13:38:28,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:28,451 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:28,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:28,664 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1229450529, now seen corresponding path program 1 times [2021-11-19 13:38:28,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:28,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221574685] [2021-11-19 13:38:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:28,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:28,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:28,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:38:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:38:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:38:29,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 13:38:30,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:30,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221574685] [2021-11-19 13:38:30,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221574685] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:30,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:30,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 13:38:30,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963440096] [2021-11-19 13:38:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:30,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:38:30,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:38:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:38:30,249 INFO L87 Difference]: Start difference. First operand 156 states and 203 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:38:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:30,547 INFO L93 Difference]: Finished difference Result 276 states and 360 transitions. [2021-11-19 13:38:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:38:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 107 [2021-11-19 13:38:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:30,550 INFO L225 Difference]: With dead ends: 276 [2021-11-19 13:38:30,550 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 13:38:30,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:38:30,551 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 65 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:30,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 578 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:38:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 13:38:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-19 13:38:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 107 states have internal predecessors, (123), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (43), 35 states have call predecessors, (43), 35 states have call successors, (43) [2021-11-19 13:38:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 202 transitions. [2021-11-19 13:38:30,562 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 202 transitions. Word has length 107 [2021-11-19 13:38:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:30,563 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 202 transitions. [2021-11-19 13:38:30,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 13:38:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 202 transitions. [2021-11-19 13:38:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:38:30,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:30,565 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:30,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:30,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:30,781 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash 299668714, now seen corresponding path program 1 times [2021-11-19 13:38:30,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:30,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047657251] [2021-11-19 13:38:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:30,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:30,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:30,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:30,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:38:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:38:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:38:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 13:38:32,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:32,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047657251] [2021-11-19 13:38:32,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047657251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:32,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:32,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:38:32,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677071722] [2021-11-19 13:38:32,486 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:32,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:38:32,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:38:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:38:32,487 INFO L87 Difference]: Start difference. First operand 156 states and 202 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 13:38:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:32,499 INFO L93 Difference]: Finished difference Result 267 states and 348 transitions. [2021-11-19 13:38:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:38:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-11-19 13:38:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:32,501 INFO L225 Difference]: With dead ends: 267 [2021-11-19 13:38:32,501 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 13:38:32,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:38:32,503 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 0 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:32,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 756 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2021-11-19 13:38:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 13:38:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-19 13:38:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 105 states have (on average 1.161904761904762) internal successors, (122), 107 states have internal predecessors, (122), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (43), 35 states have call predecessors, (43), 35 states have call successors, (43) [2021-11-19 13:38:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2021-11-19 13:38:32,514 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 113 [2021-11-19 13:38:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:32,515 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2021-11-19 13:38:32,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 13:38:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2021-11-19 13:38:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:38:32,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:32,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:32,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:32,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:32,741 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2044998327, now seen corresponding path program 1 times [2021-11-19 13:38:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:32,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738399586] [2021-11-19 13:38:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:32,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:32,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:32,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:32,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:38:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:38:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:38:34,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 13:38:34,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:34,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738399586] [2021-11-19 13:38:34,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738399586] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:34,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:34,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-19 13:38:34,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598765066] [2021-11-19 13:38:34,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:34,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:38:34,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:34,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:38:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:38:34,465 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 13:38:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:35,092 INFO L93 Difference]: Finished difference Result 261 states and 338 transitions. [2021-11-19 13:38:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:38:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 113 [2021-11-19 13:38:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:35,095 INFO L225 Difference]: With dead ends: 261 [2021-11-19 13:38:35,095 INFO L226 Difference]: Without dead ends: 153 [2021-11-19 13:38:35,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:38:35,097 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 84 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:35,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 995 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:38:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-19 13:38:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-19 13:38:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 104 states have internal predecessors, (119), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2021-11-19 13:38:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 195 transitions. [2021-11-19 13:38:35,108 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 195 transitions. Word has length 113 [2021-11-19 13:38:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:35,109 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 195 transitions. [2021-11-19 13:38:35,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 13:38:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 195 transitions. [2021-11-19 13:38:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:38:35,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:35,111 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:35,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:35,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1948801185, now seen corresponding path program 1 times [2021-11-19 13:38:35,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:35,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922167959] [2021-11-19 13:38:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:35,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:35,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:35,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:38:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:36,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:38:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:38,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:38:38,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 59 [2021-11-19 13:38:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:38:38,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:38,857 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-19 13:38:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 42 [2021-11-19 13:38:47,142 WARN L227 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 523 DAG size of output: 169 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:38:47,144 INFO L354 Elim1Store]: treesize reduction 1138, result has 27.7 percent of original size [2021-11-19 13:38:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 471 [2021-11-19 13:42:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 13:42:23,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:42:23,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922167959] [2021-11-19 13:42:23,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922167959] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:42:23,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:42:23,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 20 [2021-11-19 13:42:23,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279013217] [2021-11-19 13:42:23,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:23,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:42:23,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:42:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:42:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:42:23,253 INFO L87 Difference]: Start difference. First operand 153 states and 195 transitions. Second operand has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-19 13:42:25,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:42:27,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:42:29,375 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 [] [2021-11-19 13:42:41,099 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:43:02,527 WARN L227 SmtUtils]: Spent 20.17s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:43:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:04,254 INFO L93 Difference]: Finished difference Result 313 states and 405 transitions. [2021-11-19 13:43:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:43:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 125 [2021-11-19 13:43:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:04,256 INFO L225 Difference]: With dead ends: 313 [2021-11-19 13:43:04,257 INFO L226 Difference]: Without dead ends: 216 [2021-11-19 13:43:04,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:43:04,258 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 154 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 71 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:04,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1723 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 498 Invalid, 3 Unknown, 70 Unchecked, 9.6s Time] [2021-11-19 13:43:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-19 13:43:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2021-11-19 13:43:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 135 states have (on average 1.1555555555555554) internal successors, (156), 137 states have internal predecessors, (156), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (49), 38 states have call predecessors, (49), 38 states have call successors, (49) [2021-11-19 13:43:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 244 transitions. [2021-11-19 13:43:04,273 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 244 transitions. Word has length 125 [2021-11-19 13:43:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:04,273 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 244 transitions. [2021-11-19 13:43:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-19 13:43:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 244 transitions. [2021-11-19 13:43:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:43:04,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:04,276 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:04,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:04,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:43:04,493 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 352021405, now seen corresponding path program 1 times [2021-11-19 13:43:04,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:43:04,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140971213] [2021-11-19 13:43:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:04,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:43:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:43:04,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:43:04,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:43:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 13:43:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:43:08,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:12,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:43:12,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 13:43:12,645 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:43:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 13:43:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:43:12,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:43:12,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140971213] [2021-11-19 13:43:12,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140971213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:43:12,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991427971] [2021-11-19 13:43:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:12,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:12,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:43:12,827 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:43:12,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:43:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:43:18,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 13:43:19,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:43:19,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991427971] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:43:19,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:43:19,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20, 15, 10] total 37 [2021-11-19 13:43:19,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095173246] [2021-11-19 13:43:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:19,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:43:19,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:43:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:43:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:43:19,621 INFO L87 Difference]: Start difference. First operand 191 states and 244 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 13:43:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:19,878 INFO L93 Difference]: Finished difference Result 203 states and 261 transitions. [2021-11-19 13:43:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:43:19,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 125 [2021-11-19 13:43:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:19,881 INFO L225 Difference]: With dead ends: 203 [2021-11-19 13:43:19,881 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 13:43:19,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 457 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 13:43:19,882 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 21 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:19,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1202 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 13:43:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-11-19 13:43:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 141 states have (on average 1.148936170212766) internal successors, (162), 144 states have internal predecessors, (162), 40 states have call successors, (40), 16 states have call predecessors, (40), 18 states have return successors, (56), 39 states have call predecessors, (56), 39 states have call successors, (56) [2021-11-19 13:43:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 258 transitions. [2021-11-19 13:43:19,904 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 258 transitions. Word has length 125 [2021-11-19 13:43:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:19,906 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 258 transitions. [2021-11-19 13:43:19,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 13:43:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 258 transitions. [2021-11-19 13:43:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:43:19,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:19,909 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:19,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:20,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:20,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:20,328 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1961448611, now seen corresponding path program 1 times [2021-11-19 13:43:20,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:43:20,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660522387] [2021-11-19 13:43:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:20,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:43:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:43:20,331 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:43:20,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:43:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:21,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:43:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:43:23,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:27,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:43:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 13:43:27,251 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:43:27,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 13:43:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:43:27,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:43:27,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660522387] [2021-11-19 13:43:27,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660522387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:43:27,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [680250716] [2021-11-19 13:43:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:27,417 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:43:27,418 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:43:27,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:43:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 13:43:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:43:34,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:37,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:43:37,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 13:43:37,671 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:43:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 13:43:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:43:37,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [680250716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:43:37,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96359189] [2021-11-19 13:43:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:37,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:43:37,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:43:37,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:43:37,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 13:43:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:43:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:43:40,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:43,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:43:43,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 13:43:43,369 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:43:43,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 13:43:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:43:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96359189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:43:43,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:43:43,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16, 11, 16, 11] total 23 [2021-11-19 13:43:43,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121769037] [2021-11-19 13:43:43,570 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:43:43,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 13:43:43,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:43:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 13:43:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:43:43,572 INFO L87 Difference]: Start difference. First operand 200 states and 258 transitions. Second operand has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 7 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 13:43:45,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:43:47,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:43:49,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:43:51,704 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 [] [2021-11-19 13:43:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:55,343 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-11-19 13:43:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 13:43:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 7 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 129 [2021-11-19 13:43:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:55,346 INFO L225 Difference]: With dead ends: 346 [2021-11-19 13:43:55,346 INFO L226 Difference]: Without dead ends: 263 [2021-11-19 13:43:55,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 741 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:43:55,348 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 180 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 65 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:55,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 2580 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 563 Invalid, 4 Unknown, 214 Unchecked, 10.7s Time] [2021-11-19 13:43:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-19 13:43:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 232. [2021-11-19 13:43:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 168 states have (on average 1.1547619047619047) internal successors, (194), 171 states have internal predecessors, (194), 43 states have call successors, (43), 18 states have call predecessors, (43), 20 states have return successors, (60), 42 states have call predecessors, (60), 42 states have call successors, (60) [2021-11-19 13:43:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 297 transitions. [2021-11-19 13:43:55,365 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 297 transitions. Word has length 129 [2021-11-19 13:43:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:55,366 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 297 transitions. [2021-11-19 13:43:55,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 7 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 13:43:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 297 transitions. [2021-11-19 13:43:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:43:55,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:55,369 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:55,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:55,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 13:43:55,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 13:43:55,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:55,998 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1164928407, now seen corresponding path program 1 times [2021-11-19 13:43:56,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:43:56,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832614528] [2021-11-19 13:43:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:56,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:43:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:43:56,001 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:43:56,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86cf87c6-3e75-4772-ae00-7a24491d7fdd/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:43:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:43:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 81 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:43:59,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:11,550 WARN L227 SmtUtils]: Spent 9.15s 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) [2021-11-19 13:44:11,552 INFO L354 Elim1Store]: treesize reduction 897, result has 45.1 percent of original size [2021-11-19 13:44:11,553 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