./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:03,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:03,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:03,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:03,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:03,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:03,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:03,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:03,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:03,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:03,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:03,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:03,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:03,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:03,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:03,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:03,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:04,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:04,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:04,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:04,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:04,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:04,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:04,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:04,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:04,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:04,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:04,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:04,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:04,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:04,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:04,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:04,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:04,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:04,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:04,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:04,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:04,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:04,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:04,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:04,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:04,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:29:04,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:04,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:04,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:04,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:04,056 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:04,056 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:04,056 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:04,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:29:04,057 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:04,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:04,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:29:04,057 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:29:04,058 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:04,058 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:29:04,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:29:04,058 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:29:04,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:04,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:29:04,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:04,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:04,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:04,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:04,061 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:29:04,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:04,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:04,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:04,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:04,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:04,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:04,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:04,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:04,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:04,063 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:29:04,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:29:04,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:04,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:04,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:04,065 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 [2021-11-19 14:29:04,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:04,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:04,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:04,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:04,332 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:04,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 14:29:04,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/953ed782a/3959141e0c2a4a89ab0ca11335e50361/FLAGea7decb6a [2021-11-19 14:29:05,304 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:05,305 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 14:29:05,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/953ed782a/3959141e0c2a4a89ab0ca11335e50361/FLAGea7decb6a [2021-11-19 14:29:05,794 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/953ed782a/3959141e0c2a4a89ab0ca11335e50361 [2021-11-19 14:29:05,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:05,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:05,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:05,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:05,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:05,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:05" (1/1) ... [2021-11-19 14:29:05,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc8e65a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:05, skipping insertion in model container [2021-11-19 14:29:05,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:05" (1/1) ... [2021-11-19 14:29:05,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:05,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:06,260 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 14:29:06,267 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 14:29:06,294 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:29:06,300 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:29:07,250 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,251 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,252 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,253 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,255 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,271 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,272 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,274 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,275 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:07,757 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:29:07,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:29:07,760 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:29:07,761 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:29:07,763 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:29:07,764 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:29:07,765 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:29:07,766 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:29:07,767 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:29:07,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:29:08,036 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:29:08,257 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:08,273 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:08,347 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:08,395 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 14:29:08,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14457625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:08, skipping insertion in model container [2021-11-19 14:29:08,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:08,397 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:29:08,398 INFO L158 Benchmark]: Toolchain (without parser) took 2595.23ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 68.8MB in the beginning and 93.9MB in the end (delta: -25.1MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-11-19 14:29:08,399 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory was 61.5MB in the beginning and 61.5MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:29:08,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2592.35ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 68.5MB in the beginning and 93.9MB in the end (delta: -25.4MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-11-19 14:29:08,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory was 61.5MB in the beginning and 61.5MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2592.35ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 68.5MB in the beginning and 93.9MB in the end (delta: -25.4MB). Peak memory consumption was 31.3MB. 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:10,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:10,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:10,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:10,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:10,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:10,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:10,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:10,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:10,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:10,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:10,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:10,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:10,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:10,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:10,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:10,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:10,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:10,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:10,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:10,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:10,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:10,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:10,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:10,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:10,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:10,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:10,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:10,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:10,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:10,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:10,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:10,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:10,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:10,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:10,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:10,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:10,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:10,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:10,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:10,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:10,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:29:10,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:10,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:10,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:10,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:10,862 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:10,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:10,862 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:10,862 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:10,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:10,863 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:10,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:10,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:10,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:10,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:10,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:10,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:29:10,867 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:29:10,867 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:29:10,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:10,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:10,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:10,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:10,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:29:10,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:10,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:10,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:10,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:10,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:10,869 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:29:10,870 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:29:10,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:10,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:10,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:10,871 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 [2021-11-19 14:29:11,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:11,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:11,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:11,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:11,271 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:11,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 14:29:11,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/7f9a6b6b3/3f7aa6d0615e40a7ba5cbcb2ed07b084/FLAGe531c8899 [2021-11-19 14:29:12,276 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:12,278 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-19 14:29:12,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/7f9a6b6b3/3f7aa6d0615e40a7ba5cbcb2ed07b084/FLAGe531c8899 [2021-11-19 14:29:12,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/data/7f9a6b6b3/3f7aa6d0615e40a7ba5cbcb2ed07b084 [2021-11-19 14:29:12,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:12,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:12,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:12,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:12,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:12,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:12" (1/1) ... [2021-11-19 14:29:12,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7aa75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:12, skipping insertion in model container [2021-11-19 14:29:12,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:12" (1/1) ... [2021-11-19 14:29:12,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:12,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:13,229 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 14:29:13,235 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 14:29:13,257 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:29:13,264 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:29:14,234 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,235 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,235 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,236 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,237 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,254 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,254 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,257 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,257 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:14,677 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:29:14,679 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:29:14,680 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:29:14,681 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:29:14,689 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:29:14,693 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:29:14,694 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:29:14,695 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:29:14,695 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:29:14,696 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:29:14,894 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:29:15,015 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,016 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,080 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:15,143 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:29:15,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:15,212 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 14:29:15,213 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 14:29:15,214 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:29:15,215 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:29:15,250 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,250 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,251 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,251 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,252 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,259 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,260 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,261 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,261 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,298 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:29:15,299 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:29:15,300 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:29:15,301 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:29:15,302 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:29:15,303 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:29:15,303 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:29:15,304 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:29:15,304 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:29:15,305 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:29:15,327 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:29:15,415 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,415 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,448 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:15,481 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:29:15,495 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-19 14:29:15,495 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_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-19 14:29:15,497 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:29:15,498 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:29:15,532 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,532 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,533 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,533 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,534 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,539 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,540 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,541 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,541 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,572 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:29:15,573 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:29:15,573 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:29:15,574 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:29:15,609 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:29:15,613 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:29:15,613 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:29:15,614 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:29:15,614 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:29:15,615 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:29:15,633 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:29:15,686 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,687 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:29:15,711 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:16,048 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:29:16,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16 WrapperNode [2021-11-19 14:29:16,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:16,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:16,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:29:16,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:29:16,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,393 INFO L137 Inliner]: procedures = 713, calls = 2679, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 969 [2021-11-19 14:29:16,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:16,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:29:16,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:29:16,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:29:16,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:29:16,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:29:16,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:29:16,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:29:16,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (1/1) ... [2021-11-19 14:29:16,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:16,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:16,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:29:16,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:29:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 14:29:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 14:29:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:29:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 14:29:16,663 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 14:29:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:29:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:29:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:29:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:29:16,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:29:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:29:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:29:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:29:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 14:29:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 14:29:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:29:16,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:29:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 14:29:16,665 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 14:29:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:29:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 14:29:16,665 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 14:29:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:29:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:29:16,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:29:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:29:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:29:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:29:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:29:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:29:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 14:29:16,667 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 14:29:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-19 14:29:16,668 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-19 14:29:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-19 14:29:16,668 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-19 14:29:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-19 14:29:16,668 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-19 14:29:17,026 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:29:17,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:29:27,589 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:29:27,597 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:29:27,598 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 14:29:27,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:27 BoogieIcfgContainer [2021-11-19 14:29:27,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:29:27,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:29:27,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:29:27,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:29:27,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:29:12" (1/3) ... [2021-11-19 14:29:27,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502a124a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:27, skipping insertion in model container [2021-11-19 14:29:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:16" (2/3) ... [2021-11-19 14:29:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502a124a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:27, skipping insertion in model container [2021-11-19 14:29:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:27" (3/3) ... [2021-11-19 14:29:27,608 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_advance_harness.i [2021-11-19 14:29:27,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:29:27,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:29:27,665 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:29:27,671 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 14:29:27,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:29:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-19 14:29:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:29:27,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:27,707 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:27,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash -851421027, now seen corresponding path program 1 times [2021-11-19 14:29:27,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:27,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247706338] [2021-11-19 14:29:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:27,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:27,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:27,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:29:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:29:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:29:29,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 14:29:29,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:29,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247706338] [2021-11-19 14:29:29,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247706338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:29,295 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:29,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:29:29,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48053864] [2021-11-19 14:29:29,298 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:29,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:29:29,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:29:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:29:29,336 INFO L87 Difference]: Start difference. First operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:29:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:29,390 INFO L93 Difference]: Finished difference Result 342 states and 513 transitions. [2021-11-19 14:29:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:29:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 89 [2021-11-19 14:29:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:29,409 INFO L225 Difference]: With dead ends: 342 [2021-11-19 14:29:29,409 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 14:29:29,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 176 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 14:29:29,420 INFO L933 BasicCegarLoop]: 235 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, 235 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 14:29:29,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 14:29:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-19 14:29:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 101 states have (on average 1.198019801980198) internal successors, (121), 102 states have internal predecessors, (121), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-19 14:29:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2021-11-19 14:29:29,488 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 89 [2021-11-19 14:29:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2021-11-19 14:29:29,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:29:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2021-11-19 14:29:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:29:29,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:29,497 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:29,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:29,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:29,698 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2005321356, now seen corresponding path program 1 times [2021-11-19 14:29:29,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:29,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699306857] [2021-11-19 14:29:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:29,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:29,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:29,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:29:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:29:30,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:29:31,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:29:31,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699306857] [2021-11-19 14:29:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699306857] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:31,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:31,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 14:29:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703825102] [2021-11-19 14:29:31,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:31,753 INFO L87 Difference]: Start difference. First operand 168 states and 230 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:29:33,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:34,375 INFO L93 Difference]: Finished difference Result 412 states and 594 transitions. [2021-11-19 14:29:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:34,377 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2021-11-19 14:29:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:34,383 INFO L225 Difference]: With dead ends: 412 [2021-11-19 14:29:34,383 INFO L226 Difference]: Without dead ends: 251 [2021-11-19 14:29:34,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:34,386 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 75 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:34,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 858 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:29:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-19 14:29:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2021-11-19 14:29:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 145 states have (on average 1.186206896551724) internal successors, (172), 148 states have internal predecessors, (172), 89 states have call successors, (89), 11 states have call predecessors, (89), 12 states have return successors, (105), 87 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-19 14:29:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 366 transitions. [2021-11-19 14:29:34,427 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 366 transitions. Word has length 96 [2021-11-19 14:29:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:34,428 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 366 transitions. [2021-11-19 14:29:34,428 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:29:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 366 transitions. [2021-11-19 14:29:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:29:34,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:34,432 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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 14:29:34,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:29:34,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:34,653 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash -304504407, now seen corresponding path program 1 times [2021-11-19 14:29:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:34,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864168893] [2021-11-19 14:29:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:34,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:34,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:34,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:34,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:29:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:29:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:36,140 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 14:29:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:29:37,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:38,865 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 14:29:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:29:39,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:39,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864168893] [2021-11-19 14:29:39,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864168893] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:39,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:39,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-19 14:29:39,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815576169] [2021-11-19 14:29:39,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:29:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:29:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:29:39,067 INFO L87 Difference]: Start difference. First operand 247 states and 366 transitions. Second operand has 13 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), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 14:29:41,180 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 14:29:43,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:45,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:47,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:49,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:49,364 INFO L93 Difference]: Finished difference Result 507 states and 745 transitions. [2021-11-19 14:29:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:29:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 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), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 102 [2021-11-19 14:29:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:49,369 INFO L225 Difference]: With dead ends: 507 [2021-11-19 14:29:49,370 INFO L226 Difference]: Without dead ends: 260 [2021-11-19 14:29:49,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:29:49,373 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 19 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:49,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1654 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 3 Unknown, 117 Unchecked, 10.2s Time] [2021-11-19 14:29:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-19 14:29:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-19 14:29:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.1910828025477707) internal successors, (187), 160 states have internal predecessors, (187), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (106), 87 states have call predecessors, (106), 88 states have call successors, (106) [2021-11-19 14:29:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 382 transitions. [2021-11-19 14:29:49,414 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 382 transitions. Word has length 102 [2021-11-19 14:29:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:49,414 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 382 transitions. [2021-11-19 14:29:49,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 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), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-19 14:29:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 382 transitions. [2021-11-19 14:29:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:29:49,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:49,418 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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 14:29:49,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:49,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:49,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -358897305, now seen corresponding path program 1 times [2021-11-19 14:29:49,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:49,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583974114] [2021-11-19 14:29:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:49,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:49,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:49,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:49,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:29:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:29:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:29:51,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:29:51,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:51,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583974114] [2021-11-19 14:29:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583974114] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:51,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:51,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:29:51,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341003450] [2021-11-19 14:29:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:51,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:51,293 INFO L87 Difference]: Start difference. First operand 260 states and 382 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:29:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:51,382 INFO L93 Difference]: Finished difference Result 510 states and 769 transitions. [2021-11-19 14:29:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:51,383 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 102 [2021-11-19 14:29:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:51,396 INFO L225 Difference]: With dead ends: 510 [2021-11-19 14:29:51,396 INFO L226 Difference]: Without dead ends: 266 [2021-11-19 14:29:51,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 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 14:29:51,402 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 20 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 682 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 14:29:51,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 682 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-19 14:29:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 254. [2021-11-19 14:29:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 154 states have internal predecessors, (181), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (105), 87 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-19 14:29:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 375 transitions. [2021-11-19 14:29:51,454 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 375 transitions. Word has length 102 [2021-11-19 14:29:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:51,455 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 375 transitions. [2021-11-19 14:29:51,455 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:29:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 375 transitions. [2021-11-19 14:29:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:29:51,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:51,459 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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 14:29:51,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 14:29:51,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:51,673 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash 197444513, now seen corresponding path program 1 times [2021-11-19 14:29:51,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:51,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157231404] [2021-11-19 14:29:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:51,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:51,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:51,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:51,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:29:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:29:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:29:53,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:29:54,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:54,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157231404] [2021-11-19 14:29:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157231404] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:54,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:54,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 14:29:54,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967682467] [2021-11-19 14:29:54,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:54,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:54,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:54,341 INFO L87 Difference]: Start difference. First operand 254 states and 375 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:29:56,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:58,501 WARN L515 Checker$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 14:30:01,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:03,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:05,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:07,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:09,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:11,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:12,378 INFO L93 Difference]: Finished difference Result 516 states and 795 transitions. [2021-11-19 14:30:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:30:12,381 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 106 [2021-11-19 14:30:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:12,383 INFO L225 Difference]: With dead ends: 516 [2021-11-19 14:30:12,384 INFO L226 Difference]: Without dead ends: 274 [2021-11-19 14:30:12,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 14:30:12,386 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 42 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:12,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 821 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 8 Unknown, 51 Unchecked, 17.8s Time] [2021-11-19 14:30:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-19 14:30:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2021-11-19 14:30:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 163 states have internal predecessors, (193), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (105), 87 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-19 14:30:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 387 transitions. [2021-11-19 14:30:12,409 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 387 transitions. Word has length 106 [2021-11-19 14:30:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:12,409 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 387 transitions. [2021-11-19 14:30:12,410 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 387 transitions. [2021-11-19 14:30:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:30:12,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:12,412 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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 14:30:12,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:12,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:12,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1488735325, now seen corresponding path program 1 times [2021-11-19 14:30:12,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:12,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20246387] [2021-11-19 14:30:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:12,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:12,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:12,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:30:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:30:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:30:15,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 14:30:17,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:17,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20246387] [2021-11-19 14:30:17,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20246387] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:17,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:17,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 14:30:17,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193462752] [2021-11-19 14:30:17,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:17,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:30:17,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:17,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:30:17,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:30:17,929 INFO L87 Difference]: Start difference. First operand 263 states and 387 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:30:20,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:22,043 WARN L515 Checker$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 14:30:26,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:28,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:30,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:32,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:34,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:36,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:37,412 INFO L93 Difference]: Finished difference Result 524 states and 821 transitions. [2021-11-19 14:30:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:30:37,415 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2021-11-19 14:30:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:37,418 INFO L225 Difference]: With dead ends: 524 [2021-11-19 14:30:37,418 INFO L226 Difference]: Without dead ends: 272 [2021-11-19 14:30:37,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:30:37,422 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 38 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:37,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2188 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 7 Unknown, 388 Unchecked, 17.9s Time] [2021-11-19 14:30:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-19 14:30:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2021-11-19 14:30:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 168 states have internal predecessors, (195), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (123), 87 states have call predecessors, (123), 88 states have call successors, (123) [2021-11-19 14:30:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 407 transitions. [2021-11-19 14:30:37,450 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 407 transitions. Word has length 106 [2021-11-19 14:30:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:37,451 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 407 transitions. [2021-11-19 14:30:37,451 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:30:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 407 transitions. [2021-11-19 14:30:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:30:37,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:37,453 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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 14:30:37,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:37,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:37,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2105902303, now seen corresponding path program 1 times [2021-11-19 14:30:37,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:37,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456617211] [2021-11-19 14:30:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:37,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:37,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:37,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:37,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:30:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:30:38,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:30:38,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:30:39,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:39,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456617211] [2021-11-19 14:30:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456617211] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:39,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 14:30:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694704249] [2021-11-19 14:30:39,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:39,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:39,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:39,116 INFO L87 Difference]: Start difference. First operand 268 states and 407 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:39,198 INFO L93 Difference]: Finished difference Result 528 states and 819 transitions. [2021-11-19 14:30:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:30:39,198 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 106 [2021-11-19 14:30:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:39,201 INFO L225 Difference]: With dead ends: 528 [2021-11-19 14:30:39,201 INFO L226 Difference]: Without dead ends: 272 [2021-11-19 14:30:39,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 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 14:30:39,205 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 34 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 673 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 14:30:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 673 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-19 14:30:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 264. [2021-11-19 14:30:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 164 states have internal predecessors, (188), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (123), 87 states have call predecessors, (123), 88 states have call successors, (123) [2021-11-19 14:30:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 400 transitions. [2021-11-19 14:30:39,228 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 400 transitions. Word has length 106 [2021-11-19 14:30:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:39,229 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 400 transitions. [2021-11-19 14:30:39,229 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, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 400 transitions. [2021-11-19 14:30:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:30:39,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:39,231 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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 14:30:39,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:39,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:39,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1235124835, now seen corresponding path program 1 times [2021-11-19 14:30:39,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:39,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201958296] [2021-11-19 14:30:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:39,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:39,448 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:39,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:30:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:40,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:30:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:30:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 14:30:41,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:41,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201958296] [2021-11-19 14:30:41,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201958296] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:41,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:41,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 14:30:41,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121980099] [2021-11-19 14:30:41,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:41,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:30:41,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:30:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:41,299 INFO L87 Difference]: Start difference. First operand 264 states and 400 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:30:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:41,801 INFO L93 Difference]: Finished difference Result 527 states and 830 transitions. [2021-11-19 14:30:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:30:41,802 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2021-11-19 14:30:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:41,805 INFO L225 Difference]: With dead ends: 527 [2021-11-19 14:30:41,805 INFO L226 Difference]: Without dead ends: 273 [2021-11-19 14:30:41,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:30:41,808 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 12 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:41,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1685 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:30:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-19 14:30:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 264. [2021-11-19 14:30:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 164 states have internal predecessors, (188), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (123), 87 states have call predecessors, (123), 88 states have call successors, (123) [2021-11-19 14:30:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 400 transitions. [2021-11-19 14:30:41,833 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 400 transitions. Word has length 106 [2021-11-19 14:30:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:41,834 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 400 transitions. [2021-11-19 14:30:41,834 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, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:30:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 400 transitions. [2021-11-19 14:30:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:30:41,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:41,837 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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] [2021-11-19 14:30:41,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:42,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:42,053 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash -502310762, now seen corresponding path program 1 times [2021-11-19 14:30:42,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:42,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920817537] [2021-11-19 14:30:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:42,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:42,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:42,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:42,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:30:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:30:43,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:30:43,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:43,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920817537] [2021-11-19 14:30:43,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920817537] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:43,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:43,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 14:30:43,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377064640] [2021-11-19 14:30:43,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:30:43,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:30:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:43,863 INFO L87 Difference]: Start difference. First operand 264 states and 400 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:30:45,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:48,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:48,414 INFO L93 Difference]: Finished difference Result 553 states and 850 transitions. [2021-11-19 14:30:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:48,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 108 [2021-11-19 14:30:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:48,418 INFO L225 Difference]: With dead ends: 553 [2021-11-19 14:30:48,419 INFO L226 Difference]: Without dead ends: 348 [2021-11-19 14:30:48,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 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 14:30:48,421 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 110 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:48,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 934 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 74 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 14:30:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-19 14:30:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 255. [2021-11-19 14:30:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 157 states have (on average 1.1719745222929936) internal successors, (184), 160 states have internal predecessors, (184), 84 states have call successors, (84), 12 states have call predecessors, (84), 13 states have return successors, (111), 82 states have call predecessors, (111), 83 states have call successors, (111) [2021-11-19 14:30:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 379 transitions. [2021-11-19 14:30:48,441 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 379 transitions. Word has length 108 [2021-11-19 14:30:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:48,442 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 379 transitions. [2021-11-19 14:30:48,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:30:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 379 transitions. [2021-11-19 14:30:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:30:48,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:48,445 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:48,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:48,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:48,669 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1772700981, now seen corresponding path program 1 times [2021-11-19 14:30:48,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:48,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086909757] [2021-11-19 14:30:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:48,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:48,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:48,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:48,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:30:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:49,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:30:50,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 14:30:50,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:50,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086909757] [2021-11-19 14:30:50,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086909757] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:50,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:50,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 14:30:50,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288244745] [2021-11-19 14:30:50,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:50,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:30:50,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:50,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:30:50,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:50,548 INFO L87 Difference]: Start difference. First operand 255 states and 379 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:30:52,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:54,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:55,100 INFO L93 Difference]: Finished difference Result 501 states and 754 transitions. [2021-11-19 14:30:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 114 [2021-11-19 14:30:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:55,105 INFO L225 Difference]: With dead ends: 501 [2021-11-19 14:30:55,105 INFO L226 Difference]: Without dead ends: 299 [2021-11-19 14:30:55,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 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 14:30:55,108 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 109 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:55,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1201 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 90 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 14:30:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-19 14:30:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2021-11-19 14:30:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 181 states have (on average 1.171270718232044) internal successors, (212), 185 states have internal predecessors, (212), 103 states have call successors, (103), 12 states have call predecessors, (103), 13 states have return successors, (128), 100 states have call predecessors, (128), 102 states have call successors, (128) [2021-11-19 14:30:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 443 transitions. [2021-11-19 14:30:55,132 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 443 transitions. Word has length 114 [2021-11-19 14:30:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:55,133 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 443 transitions. [2021-11-19 14:30:55,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:30:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 443 transitions. [2021-11-19 14:30:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:30:55,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:55,136 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:55,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:55,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:55,351 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1611498304, now seen corresponding path program 2 times [2021-11-19 14:30:55,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:55,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785115997] [2021-11-19 14:30:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:30:55,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:55,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:55,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:30:56,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 14:30:56,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:30:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:30:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:30:56,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:30:56,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:56,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785115997] [2021-11-19 14:30:56,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785115997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:56,818 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:56,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:30:56,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847941107] [2021-11-19 14:30:56,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:56,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:56,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:56,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:56,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:56,820 INFO L87 Difference]: Start difference. First operand 298 states and 443 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:58,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:59,105 INFO L93 Difference]: Finished difference Result 446 states and 662 transitions. [2021-11-19 14:30:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:30:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 120 [2021-11-19 14:30:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:59,109 INFO L225 Difference]: With dead ends: 446 [2021-11-19 14:30:59,109 INFO L226 Difference]: Without dead ends: 298 [2021-11-19 14:30:59,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 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 14:30:59,111 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 22 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:59,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 843 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:30:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-19 14:30:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-11-19 14:30:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 181 states have (on average 1.171270718232044) internal successors, (212), 185 states have internal predecessors, (212), 103 states have call successors, (103), 12 states have call predecessors, (103), 13 states have return successors, (126), 100 states have call predecessors, (126), 102 states have call successors, (126) [2021-11-19 14:30:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2021-11-19 14:30:59,134 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 120 [2021-11-19 14:30:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:59,135 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2021-11-19 14:30:59,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2021-11-19 14:30:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:30:59,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:59,137 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-19 14:30:59,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:59,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:59,361 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1804072683, now seen corresponding path program 1 times [2021-11-19 14:30:59,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:59,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013595834] [2021-11-19 14:30:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:59,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:59,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:59,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:31:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 14:31:00,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:04,991 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 126 treesize of output 118 [2021-11-19 14:31:05,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:05,005 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 117 treesize of output 53 [2021-11-19 14:31:05,014 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 53 treesize of output 45 [2021-11-19 14:31:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 88 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:31:05,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:07,810 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 146 treesize of output 134 [2021-11-19 14:31:07,815 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 14:31:09,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:09,199 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 102 treesize of output 105 [2021-11-19 14:31:09,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:09,242 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 101 treesize of output 104 [2021-11-19 14:31:19,310 WARN L227 SmtUtils]: Spent 9.08s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:31:19,313 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-19 14:31:19,314 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 135 treesize of output 778 [2021-11-19 14:31:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:31:33,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:33,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013595834] [2021-11-19 14:31:33,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013595834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:33,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207024786] [2021-11-19 14:31:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:33,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:33,294 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:33,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:31:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 14:31:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:49,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:49,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 14:31:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 79 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:31:50,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:31:59,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1207024786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:59,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604865481] [2021-11-19 14:31:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:59,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:59,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:59,279 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:59,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:32:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:32:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-19 14:32:05,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-19 14:32:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604865481] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:32:07,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 14:32:07,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 13, 13, 10, 13] total 51 [2021-11-19 14:32:07,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644315315] [2021-11-19 14:32:07,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:07,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:32:07,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:32:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 14:32:07,960 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 14:32:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:08,840 INFO L93 Difference]: Finished difference Result 312 states and 473 transitions. [2021-11-19 14:32:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:32:08,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 126 [2021-11-19 14:32:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:08,844 INFO L225 Difference]: With dead ends: 312 [2021-11-19 14:32:08,844 INFO L226 Difference]: Without dead ends: 310 [2021-11-19 14:32:08,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 687 SyntacticMatches, 14 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 14:32:08,847 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 23 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:08,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1576 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:32:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-19 14:32:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2021-11-19 14:32:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 192 states have internal predecessors, (218), 105 states have call successors, (105), 13 states have call predecessors, (105), 15 states have return successors, (146), 102 states have call predecessors, (146), 104 states have call successors, (146) [2021-11-19 14:32:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 469 transitions. [2021-11-19 14:32:08,872 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 469 transitions. Word has length 126 [2021-11-19 14:32:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:08,873 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 469 transitions. [2021-11-19 14:32:08,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 14:32:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 469 transitions. [2021-11-19 14:32:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:32:08,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:08,876 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:08,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:09,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:09,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:09,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:09,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash 364744369, now seen corresponding path program 1 times [2021-11-19 14:32:09,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:09,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857971001] [2021-11-19 14:32:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:09,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:09,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:09,503 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:09,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:32:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 14:32:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:15,152 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 126 treesize of output 118 [2021-11-19 14:32:15,159 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 113 treesize of output 105 [2021-11-19 14:32:15,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:15,184 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 102 treesize of output 38 [2021-11-19 14:32:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 92 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:32:15,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:17,833 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 146 treesize of output 134 [2021-11-19 14:32:17,837 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 14:32:19,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:19,298 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 102 treesize of output 105 [2021-11-19 14:32:19,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:19,343 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 101 treesize of output 104 [2021-11-19 14:32:30,264 WARN L227 SmtUtils]: Spent 9.96s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:32:30,267 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-19 14:32:30,267 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 135 treesize of output 778 [2021-11-19 14:32:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:32:39,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:39,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857971001] [2021-11-19 14:32:39,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857971001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:39,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499790513] [2021-11-19 14:32:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:39,492 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:32:39,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:32:39,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:32:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:47,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 14:32:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:56,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:56,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-19 14:32:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:32:56,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-19 14:33:05,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499790513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:05,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811413388] [2021-11-19 14:33:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:05,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:05,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:33:05,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa08715b-aaec-4d0d-bef9-c5efdfbbdb08/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:33:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:06,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 14:33:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:09,151 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 126 treesize of output 118 [2021-11-19 14:33:09,156 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 113 treesize of output 105 [2021-11-19 14:33:09,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:33:09,165 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 102 treesize of output 38 [2021-11-19 14:33:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 92 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:33:09,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:11,017 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 146 treesize of output 134 [2021-11-19 14:33:11,021 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 14:33:11,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:33:11,367 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 102 treesize of output 105 [2021-11-19 14:33:11,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:33:11,414 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 101 treesize of output 104 [2021-11-19 14:33:20,857 WARN L227 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 14:33:20,859 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-19 14:33:20,860 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 135 treesize of output 778 [2021-11-19 14:33:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:33:40,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811413388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:40,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:33:40,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13, 10, 16, 13] total 38 [2021-11-19 14:33:40,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788751146] [2021-11-19 14:33:40,670 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:33:40,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 14:33:40,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:40,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 14:33:40,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 14:33:40,673 INFO L87 Difference]: Start difference. First operand 308 states and 469 transitions. Second operand has 38 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 38 states have internal predecessors, (152), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (36), 8 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-19 14:33:42,768 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 14:33:44,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:46,785 WARN L515 Checker$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 14:33:48,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:50,802 WARN L515 Checker$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 14:33:52,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:54,818 WARN L515 Checker$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 14:33:56,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:09,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:26,840 WARN L227 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 154 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:36:43,213 WARN L227 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 159 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:37:27,733 WARN L227 SmtUtils]: Spent 41.12s on a formula simplification. DAG size of input: 163 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:37:44,783 WARN L227 SmtUtils]: Spent 16.40s on a formula simplification. DAG size of input: 89 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:38:02,809 WARN L227 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 79 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:39:26,918 WARN L227 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 216 DAG size of output: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:40:43,723 WARN L227 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 221 DAG size of output: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:41:30,095 WARN L227 SmtUtils]: Spent 41.51s on a formula simplification. DAG size of input: 225 DAG size of output: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:42:45,760 WARN L227 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 190 DAG size of output: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:43:02,825 WARN L227 SmtUtils]: Spent 16.61s on a formula simplification. DAG size of input: 151 DAG size of output: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)