./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_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_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/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_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/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_286927d5-d9ea-4617-bd02-48f0ec0172f3/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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:48:00,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:48:00,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:48:00,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:48:00,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:48:00,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:48:00,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:48:00,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:48:00,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:48:00,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:48:00,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:48:00,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:48:00,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:48:00,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:48:00,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:48:00,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:48:00,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:48:00,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:48:00,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:48:00,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:48:00,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:48:00,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:48:00,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:48:00,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:48:00,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:48:00,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:48:00,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:48:00,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:48:00,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:48:00,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:48:00,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:48:00,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:48:00,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:48:00,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:48:00,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:48:00,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:48:00,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:48:00,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:48:00,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:48:00,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:48:00,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:48:00,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:48:00,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:48:00,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:48:00,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:48:00,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:48:00,714 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:48:00,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:48:00,720 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:48:00,720 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:48:00,720 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:48:00,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:48:00,722 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:48:00,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:48:00,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:48:00,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:48:00,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:48:00,723 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:48:00,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:48:00,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:48:00,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:48:00,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:48:00,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:48:00,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:48:00,725 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:48:00,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:48:00,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:48:00,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:48:00,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:48:00,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:48:00,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:48:00,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:48:00,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:48:00,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:48:00,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:48:00,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:48:00,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:48:00,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:48:00,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:48:00,728 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-19 15:48:00,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:48:00,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:48:00,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:48:00,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:48:00,989 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:48:00,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-19 15:48:01,046 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/df2b94301/92c1880223034a1788eb1299c05960aa/FLAGb09a1f42f [2021-11-19 15:48:01,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:48:01,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-19 15:48:01,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/df2b94301/92c1880223034a1788eb1299c05960aa/FLAGb09a1f42f [2021-11-19 15:48:02,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/df2b94301/92c1880223034a1788eb1299c05960aa [2021-11-19 15:48:02,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:48:02,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:48:02,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:02,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:48:02,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:48:02,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:02" (1/1) ... [2021-11-19 15:48:02,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19351faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:02, skipping insertion in model container [2021-11-19 15:48:02,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:02" (1/1) ... [2021-11-19 15:48:02,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:48:02,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:48:02,828 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-19 15:48:02,836 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-19 15:48:02,863 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:48:02,871 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:48:03,758 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,759 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,760 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,761 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,762 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,778 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,779 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,782 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,786 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,789 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,790 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,791 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:03,791 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:04,187 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:48:04,189 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:48:04,190 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:48:04,191 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:48:04,193 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:48:04,193 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:48:04,194 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:48:04,195 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:48:04,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:48:04,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:48:04,349 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:48:04,374 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:04,391 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 15:48:04,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@488975c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:04, skipping insertion in model container [2021-11-19 15:48:04,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:04,395 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:48:04,397 INFO L158 Benchmark]: Toolchain (without parser) took 1965.92ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 64.5MB in the end (delta: 9.5MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2021-11-19 15:48:04,399 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:48:04,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1963.14ms. Allocated memory is still 111.1MB. Free memory was 73.9MB in the beginning and 64.9MB in the end (delta: 9.0MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2021-11-19 15:48:04,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1963.14ms. Allocated memory is still 111.1MB. Free memory was 73.9MB in the beginning and 64.9MB in the end (delta: 9.0MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/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_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/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_286927d5-d9ea-4617-bd02-48f0ec0172f3/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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:48:06,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:48:06,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:48:06,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:48:06,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:48:06,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:48:06,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:48:06,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:48:06,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:48:06,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:48:06,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:48:06,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:48:06,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:48:06,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:48:06,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:48:06,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:48:06,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:48:06,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:48:06,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:48:06,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:48:06,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:48:06,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:48:06,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:48:06,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:48:06,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:48:06,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:48:06,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:48:06,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:48:06,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:48:06,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:48:06,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:48:06,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:48:06,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:48:06,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:48:06,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:48:06,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:48:06,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:48:06,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:48:06,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:48:06,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:48:06,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:48:06,993 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:48:07,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:48:07,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:48:07,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:48:07,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:48:07,039 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:48:07,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:48:07,039 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:48:07,039 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:48:07,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:48:07,040 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:48:07,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:48:07,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:48:07,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:48:07,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:48:07,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:48:07,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:48:07,044 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:48:07,044 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:48:07,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:48:07,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:48:07,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:48:07,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:48:07,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:48:07,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:48:07,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:48:07,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:48:07,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:48:07,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:48:07,047 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:48:07,048 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:48:07,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:48:07,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:48:07,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:48:07,049 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-19 15:48:07,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:48:07,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:48:07,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:48:07,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:48:07,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:48:07,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-19 15:48:07,541 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/2323f2a04/8ffa5a4dc71b4915b6a2c4de8e90af34/FLAG22671a805 [2021-11-19 15:48:08,407 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:48:08,408 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-19 15:48:08,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/2323f2a04/8ffa5a4dc71b4915b6a2c4de8e90af34/FLAG22671a805 [2021-11-19 15:48:08,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/data/2323f2a04/8ffa5a4dc71b4915b6a2c4de8e90af34 [2021-11-19 15:48:08,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:48:08,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:48:08,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:08,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:48:08,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:48:08,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:08" (1/1) ... [2021-11-19 15:48:08,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0244b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:08, skipping insertion in model container [2021-11-19 15:48:08,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:08" (1/1) ... [2021-11-19 15:48:08,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:48:09,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:48:09,345 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-19 15:48:09,351 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-19 15:48:09,374 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:48:09,379 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:48:10,349 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,350 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,351 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,352 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,353 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,375 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,376 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,378 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,378 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,380 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,381 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,382 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,383 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:10,778 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:48:10,779 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:48:10,781 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:48:10,783 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:48:10,810 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:48:10,812 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:48:10,813 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:48:10,813 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:48:10,821 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:48:10,828 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:48:11,010 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:48:11,033 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:11,060 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:48:11,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:48:11,107 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-19 15:48:11,109 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-19 15:48:11,117 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:48:11,118 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:48:11,178 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,179 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,181 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,181 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,182 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,189 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,190 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,191 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,191 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,194 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,194 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,196 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,199 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,239 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:48:11,240 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:48:11,241 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:48:11,241 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:48:11,242 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:48:11,243 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:48:11,243 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:48:11,244 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:48:11,244 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:48:11,245 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:48:11,276 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:48:11,300 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:11,308 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:48:11,333 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-19 15:48:11,333 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_286927d5-d9ea-4617-bd02-48f0ec0172f3/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-19 15:48:11,335 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:48:11,336 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:48:11,415 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,415 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,415 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,416 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,416 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,422 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,423 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,424 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,428 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,430 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,430 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,431 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,432 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:48:11,475 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:48:11,476 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:48:11,478 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:48:11,479 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:48:11,480 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:48:11,481 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:48:11,482 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:48:11,482 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:48:11,483 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:48:11,483 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:48:11,525 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:48:11,543 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:11,890 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:48:11,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11 WrapperNode [2021-11-19 15:48:11,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:11,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:48:11,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:48:11,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:48:11,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,099 INFO L137 Inliner]: procedures = 700, calls = 1047, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2021-11-19 15:48:12,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:48:12,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:48:12,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:48:12,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:48:12,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:48:12,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:48:12,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:48:12,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:48:12,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (1/1) ... [2021-11-19 15:48:12,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:48:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:12,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:48:12,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:48:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2021-11-19 15:48:12,274 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2021-11-19 15:48:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:48:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:48:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:48:12,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:48:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 15:48:12,274 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 15:48:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:48:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-19 15:48:12,275 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-19 15:48:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:48:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:48:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:48:12,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:48:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-19 15:48:12,275 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-19 15:48:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 15:48:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 15:48:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:48:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:48:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:48:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 15:48:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 15:48:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-19 15:48:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-19 15:48:12,505 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:48:12,507 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:48:12,988 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:48:13,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:48:13,003 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 15:48:13,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:48:13 BoogieIcfgContainer [2021-11-19 15:48:13,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:48:13,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:48:13,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:48:13,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:48:13,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:48:08" (1/3) ... [2021-11-19 15:48:13,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff02300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:48:13, skipping insertion in model container [2021-11-19 15:48:13,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:11" (2/3) ... [2021-11-19 15:48:13,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff02300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:48:13, skipping insertion in model container [2021-11-19 15:48:13,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:48:13" (3/3) ... [2021-11-19 15:48:13,013 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-11-19 15:48:13,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:48:13,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:48:13,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:48:13,075 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 15:48:13,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:48:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-19 15:48:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:48:13,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:13,106 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:13,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 464723229, now seen corresponding path program 1 times [2021-11-19 15:48:13,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:13,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478791835] [2021-11-19 15:48:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:13,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:13,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:48:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:48:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 15:48:13,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:48:13,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:13,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478791835] [2021-11-19 15:48:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478791835] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:13,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:13,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 15:48:13,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615294597] [2021-11-19 15:48:13,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:13,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:48:13,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:48:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:48:14,022 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:48:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:14,090 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2021-11-19 15:48:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:48:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 84 [2021-11-19 15:48:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:14,116 INFO L225 Difference]: With dead ends: 188 [2021-11-19 15:48:14,116 INFO L226 Difference]: Without dead ends: 93 [2021-11-19 15:48:14,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 166 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 15:48:14,127 INFO L933 BasicCegarLoop]: 127 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, 127 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 15:48:14,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-19 15:48:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-19 15:48:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-19 15:48:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-11-19 15:48:14,176 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2021-11-19 15:48:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:14,179 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-11-19 15:48:14,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:48:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-11-19 15:48:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:48:14,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:14,189 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:14,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:14,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:14,414 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:14,418 INFO L85 PathProgramCache]: Analyzing trace with hash 463621205, now seen corresponding path program 1 times [2021-11-19 15:48:14,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:14,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993614508] [2021-11-19 15:48:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:14,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:14,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:14,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:14,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:48:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:48:14,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:48:14,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:48:15,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:15,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993614508] [2021-11-19 15:48:15,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993614508] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:15,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-19 15:48:15,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232781653] [2021-11-19 15:48:15,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:15,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:15,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:15,250 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 15:48:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:15,382 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2021-11-19 15:48:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:48:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2021-11-19 15:48:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:15,393 INFO L225 Difference]: With dead ends: 169 [2021-11-19 15:48:15,393 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 15:48:15,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:48:15,395 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:15,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 563 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 15:48:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-19 15:48:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:48:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-11-19 15:48:15,428 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2021-11-19 15:48:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:15,429 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-11-19 15:48:15,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 15:48:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-11-19 15:48:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:48:15,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:15,437 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:15,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:15,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:15,654 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash -583798319, now seen corresponding path program 1 times [2021-11-19 15:48:15,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:15,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687723172] [2021-11-19 15:48:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:15,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:15,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:15,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:48:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:48:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:48:16,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 15:48:16,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:16,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687723172] [2021-11-19 15:48:16,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687723172] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:16,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:16,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-19 15:48:16,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684092629] [2021-11-19 15:48:16,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:16,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:48:16,600 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:16,877 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2021-11-19 15:48:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2021-11-19 15:48:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:16,880 INFO L225 Difference]: With dead ends: 174 [2021-11-19 15:48:16,880 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 15:48:16,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:48:16,882 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 50 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:16,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 663 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 15:48:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-19 15:48:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:48:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2021-11-19 15:48:16,895 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2021-11-19 15:48:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:16,895 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2021-11-19 15:48:16,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2021-11-19 15:48:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 15:48:16,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:16,897 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:16,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:17,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:17,114 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:17,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1801781246, now seen corresponding path program 1 times [2021-11-19 15:48:17,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:17,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921444933] [2021-11-19 15:48:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:17,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:17,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:17,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:48:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:17,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:48:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:48:17,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 15:48:18,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:18,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921444933] [2021-11-19 15:48:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921444933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:18,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:18,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2021-11-19 15:48:18,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763367324] [2021-11-19 15:48:18,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:18,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:48:18,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:48:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:48:18,096 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:18,487 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2021-11-19 15:48:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-11-19 15:48:18,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:18,490 INFO L225 Difference]: With dead ends: 183 [2021-11-19 15:48:18,491 INFO L226 Difference]: Without dead ends: 103 [2021-11-19 15:48:18,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:48:18,493 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 76 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:18,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 752 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:48:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-19 15:48:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-11-19 15:48:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:48:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2021-11-19 15:48:18,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2021-11-19 15:48:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:18,509 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2021-11-19 15:48:18,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2021-11-19 15:48:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 15:48:18,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:18,511 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:18,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:18,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:18,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1442434984, now seen corresponding path program 1 times [2021-11-19 15:48:18,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:18,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867656271] [2021-11-19 15:48:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:18,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:18,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:18,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:48:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:48:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:48:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 15:48:19,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:19,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867656271] [2021-11-19 15:48:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867656271] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:19,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:19,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3] total 9 [2021-11-19 15:48:19,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001966620] [2021-11-19 15:48:19,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:19,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:19,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:48:19,467 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:19,736 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2021-11-19 15:48:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:19,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2021-11-19 15:48:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:19,739 INFO L225 Difference]: With dead ends: 179 [2021-11-19 15:48:19,739 INFO L226 Difference]: Without dead ends: 102 [2021-11-19 15:48:19,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:48:19,741 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 58 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:19,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 561 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-19 15:48:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-11-19 15:48:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:48:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2021-11-19 15:48:19,759 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2021-11-19 15:48:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:19,760 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2021-11-19 15:48:19,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:48:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2021-11-19 15:48:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 15:48:19,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:19,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:19,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:19,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:19,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1734248118, now seen corresponding path program 1 times [2021-11-19 15:48:19,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:19,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408906505] [2021-11-19 15:48:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:19,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:19,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:19,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:48:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:20,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:48:20,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:48:20,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:48:20,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:20,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408906505] [2021-11-19 15:48:20,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408906505] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:20,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:20,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 15:48:20,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459549998] [2021-11-19 15:48:20,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:20,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:48:20,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:48:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:48:20,647 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:48:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:20,743 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2021-11-19 15:48:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2021-11-19 15:48:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:20,748 INFO L225 Difference]: With dead ends: 178 [2021-11-19 15:48:20,748 INFO L226 Difference]: Without dead ends: 100 [2021-11-19 15:48:20,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:48:20,750 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:20,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 681 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-19 15:48:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-11-19 15:48:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:48:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-11-19 15:48:20,766 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2021-11-19 15:48:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:20,766 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-11-19 15:48:20,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:48:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-11-19 15:48:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 15:48:20,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:20,768 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:20,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:20,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:20,985 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 26119479, now seen corresponding path program 1 times [2021-11-19 15:48:20,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:20,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862334202] [2021-11-19 15:48:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:20,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:20,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:20,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:21,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:48:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 15:48:21,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:48:22,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-19 15:48:23,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:23,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862334202] [2021-11-19 15:48:23,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862334202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:48:23,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682365342] [2021-11-19 15:48:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:23,085 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:48:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:48:23,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:48:23,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 15:48:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:23,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:48:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:48:23,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 15:48:23,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682365342] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:23,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:48:23,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-19 15:48:23,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000411536] [2021-11-19 15:48:23,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:23,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:23,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:23,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:23,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:48:23,996 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:48:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:24,166 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2021-11-19 15:48:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:48:24,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2021-11-19 15:48:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:24,168 INFO L225 Difference]: With dead ends: 183 [2021-11-19 15:48:24,169 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 15:48:24,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:48:24,171 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 8 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:24,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 783 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 15:48:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-11-19 15:48:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:48:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2021-11-19 15:48:24,184 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 99 [2021-11-19 15:48:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:24,185 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2021-11-19 15:48:24,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:48:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2021-11-19 15:48:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 15:48:24,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:24,187 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:24,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:24,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:24,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:48:24,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2063472241, now seen corresponding path program 1 times [2021-11-19 15:48:24,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:24,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968323877] [2021-11-19 15:48:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:24,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:24,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:24,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:24,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:48:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:24,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 15:48:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:27,444 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (_ bv0 64)) (_ bv16 64)))) (exists ((v_aws_linked_list_back_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= v_aws_linked_list_back_~list.base_BEFORE_CALL_6 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_6) (_ bv0 64)))))) is different from true [2021-11-19 15:48:35,684 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:48:44,057 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:48:52,299 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:49:00,746 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:49:09,074 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:49:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:49:09,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:14,853 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 15:49:14,854 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 36 treesize of output 35 [2021-11-19 15:49:14,873 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 15:49:14,874 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 31 treesize of output 23 [2021-11-19 15:49:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:49:14,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:14,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968323877] [2021-11-19 15:49:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968323877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:49:14,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218364998] [2021-11-19 15:49:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:14,927 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:49:14,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:49:14,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:49:14,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 15:49:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 15:49:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:15,737 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 15:49:15,737 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 15:49:24,157 WARN L227 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:49:24,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:49:24,158 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 1 case distinctions, treesize of input 71 treesize of output 84 [2021-11-19 15:57:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 29 proven. 2 refuted. 29 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:57:57,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:58:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 15:58:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218364998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:58:02,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600712337] [2021-11-19 15:58:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:58:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:58:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:58:02,017 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:58:02,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286927d5-d9ea-4617-bd02-48f0ec0172f3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 15:58:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:58:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 15:58:02,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:58:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:58:16,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:58:19,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:58:19,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:58:19,925 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:58:19,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:58:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 15:58:20,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600712337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:58:20,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:58:20,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17, 9, 14, 9] total 61 [2021-11-19 15:58:20,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443234190] [2021-11-19 15:58:20,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:58:20,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-19 15:58:20,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:58:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-19 15:58:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3270, Unknown=18, NotChecked=116, Total=3660 [2021-11-19 15:58:20,051 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 61 states, 55 states have (on average 4.3090909090909095) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 13 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-19 15:59:23,745 WARN L227 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:59:38,128 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 16:00:02,946 WARN L227 SmtUtils]: Spent 18.29s on a formula simplification. DAG size of input: 65 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 16:00:15,506 WARN L227 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 16:00:26,040 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 16:00:36,537 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 16:01:01,287 WARN L227 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 16:01:39,834 WARN L227 SmtUtils]: Spent 17.69s on a formula simplification. DAG size of input: 70 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)