./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.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_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/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_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/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_e035880d-dd5c-4402-9579-5925fb1c8675/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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:26:42,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:26:42,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:26:42,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:26:42,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:26:42,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:26:42,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:26:42,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:26:42,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:26:42,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:26:42,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:26:42,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:26:42,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:26:42,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:26:42,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:26:42,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:26:42,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:26:42,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:26:42,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:26:42,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:26:42,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:26:42,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:26:42,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:26:42,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:26:42,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:26:42,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:26:42,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:26:42,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:26:42,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:26:42,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:26:42,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:26:42,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:26:42,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:26:42,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:26:42,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:26:42,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:26:42,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:26:42,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:26:42,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:26:42,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:26:42,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:26:42,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:26:42,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:26:42,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:26:42,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:26:42,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:26:42,538 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:26:42,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:26:42,539 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:26:42,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:26:42,539 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:26:42,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:26:42,540 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:26:42,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:26:42,540 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:26:42,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:26:42,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:26:42,541 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:26:42,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:26:42,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:26:42,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:26:42,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:26:42,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:26:42,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:26:42,543 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:26:42,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:26:42,543 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:26:42,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:26:42,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:26:42,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:26:42,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:26:42,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:26:42,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:26:42,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:26:42,545 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:26:42,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:26:42,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:26:42,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:26:42,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:26:42,546 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_e035880d-dd5c-4402-9579-5925fb1c8675/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2021-11-19 14:26:42,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:26:42,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:26:42,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:26:42,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:26:42,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:26:42,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-19 14:26:42,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/24d326a05/ab0d6d3076834d768d2f5a4894dd927f/FLAG415528712 [2021-11-19 14:26:43,696 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:26:43,697 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-19 14:26:43,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/24d326a05/ab0d6d3076834d768d2f5a4894dd927f/FLAG415528712 [2021-11-19 14:26:44,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/24d326a05/ab0d6d3076834d768d2f5a4894dd927f [2021-11-19 14:26:44,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:26:44,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:26:44,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:44,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:26:44,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:26:44,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:44" (1/1) ... [2021-11-19 14:26:44,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bdd4c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:44, skipping insertion in model container [2021-11-19 14:26:44,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:44" (1/1) ... [2021-11-19 14:26:44,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:26:44,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:26:44,684 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-19 14:26:44,693 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-19 14:26:44,713 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:26:44,718 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:26:45,498 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,498 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,499 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,499 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,501 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,516 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,517 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,519 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,520 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,522 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,523 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,524 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,525 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:45,966 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:26:45,967 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:26:45,968 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:26:45,970 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:26:45,971 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:26:45,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:26:45,973 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:26:45,974 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:26:45,975 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:26:45,975 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:26:46,142 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:26:46,166 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:46,184 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:26:46,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10928a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:46, skipping insertion in model container [2021-11-19 14:26:46,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:46,186 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:26:46,188 INFO L158 Benchmark]: Toolchain (without parser) took 1942.15ms. Allocated memory is still 109.1MB. Free memory was 86.1MB in the beginning and 52.9MB in the end (delta: 33.3MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2021-11-19 14:26:46,188 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:26:46,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1939.31ms. Allocated memory is still 109.1MB. Free memory was 85.7MB in the beginning and 52.9MB in the end (delta: 32.9MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2021-11-19 14:26:46,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1939.31ms. Allocated memory is still 109.1MB. Free memory was 85.7MB in the beginning and 52.9MB in the end (delta: 32.9MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: 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_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/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_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/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_e035880d-dd5c-4402-9579-5925fb1c8675/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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:26:48,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:26:48,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:26:48,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:26:48,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:26:48,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:26:48,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:26:48,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:26:48,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:26:48,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:26:48,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:26:48,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:26:48,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:26:48,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:26:48,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:26:48,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:26:48,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:26:48,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:26:48,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:26:48,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:26:48,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:26:48,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:26:48,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:26:48,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:26:48,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:26:48,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:26:48,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:26:48,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:26:48,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:26:48,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:26:48,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:26:48,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:26:48,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:26:48,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:26:48,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:26:48,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:26:48,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:26:48,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:26:48,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:26:48,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:26:48,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:26:48,500 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:26:48,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:26:48,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:26:48,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:26:48,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:26:48,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:26:48,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:26:48,548 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:26:48,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:26:48,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:26:48,548 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:26:48,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:26:48,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:26:48,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:26:48,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:26:48,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:26:48,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:26:48,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:26:48,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:26:48,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:26:48,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:26:48,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:26:48,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:26:48,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:26:48,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:26:48,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:26:48,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:26:48,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:26:48,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:26:48,554 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:26:48,554 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:26:48,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:26:48,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:26:48,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:26:48,555 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_e035880d-dd5c-4402-9579-5925fb1c8675/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2021-11-19 14:26:48,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:26:48,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:26:48,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:26:48,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:26:48,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:26:48,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-19 14:26:49,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/1716e6904/f1e92ce52b734486bb3f79fdbe077b74/FLAG47fb43c31 [2021-11-19 14:26:49,858 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:26:49,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-11-19 14:26:49,903 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/1716e6904/f1e92ce52b734486bb3f79fdbe077b74/FLAG47fb43c31 [2021-11-19 14:26:50,394 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/data/1716e6904/f1e92ce52b734486bb3f79fdbe077b74 [2021-11-19 14:26:50,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:26:50,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:26:50,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:50,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:26:50,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:26:50,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:50" (1/1) ... [2021-11-19 14:26:50,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4360fcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:50, skipping insertion in model container [2021-11-19 14:26:50,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:50" (1/1) ... [2021-11-19 14:26:50,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:26:50,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:26:50,944 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-19 14:26:50,956 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-19 14:26:50,988 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:26:50,992 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:26:51,769 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,770 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,770 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,771 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,773 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,790 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,791 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,794 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,795 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,797 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,799 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,800 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:51,800 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:26:52,198 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:26:52,201 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:26:52,202 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:26:52,204 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:26:52,204 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:26:52,205 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:26:52,206 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:26:52,207 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:26:52,208 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:26:52,413 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:26:52,440 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:52,462 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:26:52,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:26:52,511 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-19 14:26:52,515 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-19 14:26:52,517 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:26:52,517 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:26:52,605 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,611 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,611 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,615 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,617 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,632 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,635 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,638 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,638 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,641 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,642 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,643 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,646 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,720 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:26:52,722 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:26:52,722 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:26:52,724 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:26:52,730 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:26:52,730 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:26:52,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:26:52,732 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:26:52,732 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:26:52,733 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:26:52,775 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:26:52,817 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:52,831 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:26:52,855 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-11-19 14:26:52,861 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_e035880d-dd5c-4402-9579-5925fb1c8675/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-11-19 14:26:52,870 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 14:26:52,871 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 14:26:52,946 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,947 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,947 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,948 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,949 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,962 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,962 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,964 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,965 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,965 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,966 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 14:26:52,997 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 14:26:52,998 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 14:26:52,999 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 14:26:52,999 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 14:26:53,000 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 14:26:53,001 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 14:26:53,001 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 14:26:53,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 14:26:53,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 14:26:53,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 14:26:53,024 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 14:26:53,043 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:53,418 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:26:53,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53 WrapperNode [2021-11-19 14:26:53,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:53,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:26:53,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:26:53,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:26:53,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,582 INFO L137 Inliner]: procedures = 700, calls = 1034, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2021-11-19 14:26:53,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:26:53,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:26:53,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:26:53,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:26:53,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:26:53,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:26:53,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:26:53,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:26:53,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:26:53,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:53,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:26:53,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:26:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-11-19 14:26:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-11-19 14:26:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-19 14:26:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-19 14:26:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:26:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:26:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:26:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:26:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:26:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:26:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:26:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:26:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:26:53,733 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:26:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:26:53,734 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:26:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:26:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:26:54,000 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:26:54,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:26:54,150 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:26:54,156 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:26:54,156 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 14:26:54,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:26:54 BoogieIcfgContainer [2021-11-19 14:26:54,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:26:54,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:26:54,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:26:54,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:26:54,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:26:50" (1/3) ... [2021-11-19 14:26:54,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cb876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:26:54, skipping insertion in model container [2021-11-19 14:26:54,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (2/3) ... [2021-11-19 14:26:54,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cb876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:26:54, skipping insertion in model container [2021-11-19 14:26:54,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:26:54" (3/3) ... [2021-11-19 14:26:54,167 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2021-11-19 14:26:54,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:26:54,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:26:54,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:26:54,267 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:26:54,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:26:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 14:26:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 14:26:54,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:54,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:54,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2021-11-19 14:26:54,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:54,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022790922] [2021-11-19 14:26:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:54,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:54,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:54,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:26:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:26:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:54,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:54,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:54,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022790922] [2021-11-19 14:26:54,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022790922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:54,703 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:54,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:26:54,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853160819] [2021-11-19 14:26:54,706 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:54,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:26:54,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:26:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:26:54,745 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:26:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:54,770 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-11-19 14:26:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:26:54,773 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-19 14:26:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:54,781 INFO L225 Difference]: With dead ends: 75 [2021-11-19 14:26:54,781 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 14:26:54,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:26:54,789 INFO L933 BasicCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:54,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:26:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 14:26:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-19 14:26:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:26:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-19 14:26:54,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-11-19 14:26:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-19 14:26:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:26:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-19 14:26:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:26:54,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:54,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:54,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:55,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2021-11-19 14:26:55,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:55,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706490546] [2021-11-19 14:26:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:55,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:55,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:55,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:26:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:55,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:55,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:55,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706490546] [2021-11-19 14:26:55,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706490546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:55,454 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:55,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:26:55,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594078549] [2021-11-19 14:26:55,455 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:55,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:55,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:26:55,458 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:26:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:55,544 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-11-19 14:26:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:26:55,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2021-11-19 14:26:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:55,558 INFO L225 Difference]: With dead ends: 64 [2021-11-19 14:26:55,558 INFO L226 Difference]: Without dead ends: 38 [2021-11-19 14:26:55,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:26:55,559 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:55,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:26:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-19 14:26:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-19 14:26:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:26:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-19 14:26:55,584 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2021-11-19 14:26:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:55,584 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-19 14:26:55,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:26:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-19 14:26:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 14:26:55,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:55,586 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:26:55,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:55,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:55,787 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:55,788 INFO L85 PathProgramCache]: Analyzing trace with hash 891828778, now seen corresponding path program 1 times [2021-11-19 14:26:55,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:55,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035633464] [2021-11-19 14:26:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:55,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:55,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:55,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:26:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:26:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:56,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:56,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035633464] [2021-11-19 14:26:56,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035633464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:56,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015169955] [2021-11-19 14:26:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:56,415 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:26:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:26:56,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:26:56,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:26:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:26:56,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:56,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:56,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2015169955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:56,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112501950] [2021-11-19 14:26:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:56,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:56,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:26:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:26:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:57,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:57,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112501950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:57,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:26:57,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-19 14:26:57,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086956639] [2021-11-19 14:26:57,538 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:26:57,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:26:57,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:26:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:26:57,546 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:26:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:58,081 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-11-19 14:26:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:26:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-11-19 14:26:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:58,083 INFO L225 Difference]: With dead ends: 68 [2021-11-19 14:26:58,084 INFO L226 Difference]: Without dead ends: 42 [2021-11-19 14:26:58,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:26:58,086 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:58,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 287 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:26:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-19 14:26:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-19 14:26:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:26:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-19 14:26:58,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2021-11-19 14:26:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:58,095 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-19 14:26:58,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:26:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-19 14:26:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 14:26:58,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:58,097 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:58,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:58,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:58,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:58,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:26:58,712 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1668252970, now seen corresponding path program 2 times [2021-11-19 14:26:58,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:58,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453920056] [2021-11-19 14:26:58,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:26:58,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:58,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:58,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:58,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:26:58,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:26:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:26:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:26:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:59,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:00,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:00,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453920056] [2021-11-19 14:27:00,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453920056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:00,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417347274] [2021-11-19 14:27:00,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:27:00,034 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:27:00,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:27:00,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:27:00,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:27:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:27:00,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:00,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:00,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417347274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:00,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515595902] [2021-11-19 14:27:00,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:27:00,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:00,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:27:00,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:27:00,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:27:01,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:27:01,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:27:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:01,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:01,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515595902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:01,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:27:01,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-19 14:27:01,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796404195] [2021-11-19 14:27:01,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:27:01,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:27:01,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:27:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:27:01,561 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:27:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:03,836 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-11-19 14:27:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:27:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-11-19 14:27:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:03,842 INFO L225 Difference]: With dead ends: 76 [2021-11-19 14:27:03,842 INFO L226 Difference]: Without dead ends: 50 [2021-11-19 14:27:03,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:27:03,844 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:03,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 321 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:27:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-19 14:27:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-19 14:27:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:27:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-19 14:27:03,854 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-11-19 14:27:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:03,854 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-19 14:27:03,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:27:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-19 14:27:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 14:27:03,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:03,856 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:03,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:04,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:04,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 14:27:04,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:04,476 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash 988125994, now seen corresponding path program 3 times [2021-11-19 14:27:04,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:04,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93609281] [2021-11-19 14:27:04,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:27:04,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:04,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:04,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:04,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:27:04,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:27:04,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:27:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:05,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:08,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:08,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93609281] [2021-11-19 14:27:08,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93609281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:08,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636029648] [2021-11-19 14:27:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:27:08,210 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:08,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:27:08,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:27:08,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:27:09,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:27:09,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:27:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:09,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:10,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636029648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:10,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416484302] [2021-11-19 14:27:10,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:27:10,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:27:10,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:27:10,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 14:27:20,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:27:20,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:20,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:27:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:20,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:21,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416484302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:21,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:27:21,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 39 [2021-11-19 14:27:21,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464595106] [2021-11-19 14:27:21,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:27:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 14:27:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 14:27:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 14:27:21,480 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:27:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:31,182 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-11-19 14:27:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 14:27:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-19 14:27:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:31,185 INFO L225 Difference]: With dead ends: 92 [2021-11-19 14:27:31,185 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 14:27:31,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=798, Invalid=2064, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 14:27:31,189 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:31,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 569 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:27:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 14:27:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-19 14:27:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 14:27:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-19 14:27:31,205 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 40 [2021-11-19 14:27:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:31,205 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-19 14:27:31,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:27:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-19 14:27:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 14:27:31,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:31,208 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:31,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:31,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:31,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:31,813 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 511579094, now seen corresponding path program 4 times [2021-11-19 14:27:31,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:31,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686865673] [2021-11-19 14:27:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:27:31,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:31,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:31,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:27:32,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:27:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 14:27:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:32,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-19 14:27:32,245 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-19 14:27:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 14:27:32,377 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-19 14:27:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-19 14:27:32,617 INFO L354 Elim1Store]: treesize reduction 107, result has 19.5 percent of original size [2021-11-19 14:27:32,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-19 14:27:32,942 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-19 14:27:32,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-19 14:27:33,349 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-19 14:27:33,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-19 14:27:33,858 INFO L354 Elim1Store]: treesize reduction 338, result has 13.6 percent of original size [2021-11-19 14:27:33,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-19 14:27:34,446 INFO L354 Elim1Store]: treesize reduction 446, result has 12.4 percent of original size [2021-11-19 14:27:34,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-19 14:27:35,213 INFO L354 Elim1Store]: treesize reduction 532, result has 11.8 percent of original size [2021-11-19 14:27:35,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 113 [2021-11-19 14:27:36,066 INFO L354 Elim1Store]: treesize reduction 671, result has 10.7 percent of original size [2021-11-19 14:27:36,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-11-19 14:27:37,258 INFO L354 Elim1Store]: treesize reduction 818, result has 9.9 percent of original size [2021-11-19 14:27:37,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2021-11-19 14:27:38,516 INFO L354 Elim1Store]: treesize reduction 979, result has 9.3 percent of original size [2021-11-19 14:27:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 126 treesize of output 155 [2021-11-19 14:27:40,334 INFO L354 Elim1Store]: treesize reduction 1154, result has 8.7 percent of original size [2021-11-19 14:27:40,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 137 treesize of output 169 [2021-11-19 14:27:42,418 INFO L354 Elim1Store]: treesize reduction 1343, result has 8.2 percent of original size [2021-11-19 14:27:42,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 148 treesize of output 183 [2021-11-19 14:27:44,702 INFO L354 Elim1Store]: treesize reduction 1438, result has 8.0 percent of original size [2021-11-19 14:27:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 191 [2021-11-19 14:27:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:52,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:54,683 WARN L227 SmtUtils]: Spent 2.01m on a formula simplification that was a NOOP. DAG size: 142 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:30:41,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 109 [2021-11-19 14:30:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 655343 treesize of output 655341 [2021-11-19 14:30:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:54,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:54,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686865673] [2021-11-19 14:30:54,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686865673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:54,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22507252] [2021-11-19 14:30:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:30:54,649 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:30:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:30:54,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:30:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:30:55,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:30:55,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:30:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 14:30:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 14:30:57,757 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-11-19 14:30:57,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-19 14:30:57,854 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-19 14:30:57,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-19 14:30:58,020 INFO L354 Elim1Store]: treesize reduction 107, result has 19.5 percent of original size [2021-11-19 14:30:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-19 14:30:58,240 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-19 14:30:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-11-19 14:30:58,593 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-19 14:30:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-19 14:30:58,974 INFO L354 Elim1Store]: treesize reduction 326, result has 14.0 percent of original size [2021-11-19 14:30:58,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 87 [2021-11-19 14:30:59,550 INFO L354 Elim1Store]: treesize reduction 446, result has 12.4 percent of original size [2021-11-19 14:30:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-19 14:31:00,150 INFO L354 Elim1Store]: treesize reduction 568, result has 11.4 percent of original size [2021-11-19 14:31:00,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 116 [2021-11-19 14:31:01,183 INFO L354 Elim1Store]: treesize reduction 653, result has 10.9 percent of original size [2021-11-19 14:31:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 103 treesize of output 126 [2021-11-19 14:31:02,375 INFO L354 Elim1Store]: treesize reduction 818, result has 9.9 percent of original size [2021-11-19 14:31:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2021-11-19 14:31:03,643 INFO L354 Elim1Store]: treesize reduction 931, result has 9.5 percent of original size [2021-11-19 14:31:03,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2021-11-19 14:31:05,288 INFO L354 Elim1Store]: treesize reduction 1154, result has 8.7 percent of original size [2021-11-19 14:31:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 137 treesize of output 169 [2021-11-19 14:31:07,020 INFO L354 Elim1Store]: treesize reduction 1343, result has 8.2 percent of original size [2021-11-19 14:31:07,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 148 treesize of output 183 [2021-11-19 14:31:09,161 INFO L354 Elim1Store]: treesize reduction 1438, result has 8.0 percent of original size [2021-11-19 14:31:09,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 191 [2021-11-19 14:31:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:19,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:22,330 WARN L227 SmtUtils]: Spent 2.05m on a formula simplification that was a NOOP. DAG size: 142 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:33:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2021-11-19 14:33:23,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 109 [2021-11-19 14:33:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 655343 treesize of output 655341 [2021-11-19 14:33:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:33,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [22507252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:33,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077998087] [2021-11-19 14:33:33,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:33:33,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:33,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:33:33,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e035880d-dd5c-4402-9579-5925fb1c8675/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:33:33,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:33:33,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:33:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-19 14:33:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:34,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-19 14:33:34,119 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-19 14:33:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 14:33:34,619 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-19 14:33:34,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-19 14:33:35,244 INFO L354 Elim1Store]: treesize reduction 107, result has 19.5 percent of original size [2021-11-19 14:33:35,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-19 14:33:35,995 INFO L354 Elim1Store]: treesize reduction 176, result has 16.6 percent of original size [2021-11-19 14:33:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-11-19 14:33:37,033 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-19 14:33:37,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-19 14:33:38,079 INFO L354 Elim1Store]: treesize reduction 338, result has 13.6 percent of original size [2021-11-19 14:33:38,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-19 14:33:39,455 INFO L354 Elim1Store]: treesize reduction 446, result has 12.4 percent of original size [2021-11-19 14:33:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-19 14:33:40,988 INFO L354 Elim1Store]: treesize reduction 568, result has 11.4 percent of original size [2021-11-19 14:33:40,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 116 [2021-11-19 14:33:42,805 INFO L354 Elim1Store]: treesize reduction 653, result has 10.9 percent of original size [2021-11-19 14:33:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 103 treesize of output 126 [2021-11-19 14:33:44,770 INFO L354 Elim1Store]: treesize reduction 786, result has 10.2 percent of original size [2021-11-19 14:33:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-11-19 14:33:46,981 INFO L354 Elim1Store]: treesize reduction 931, result has 9.5 percent of original size [2021-11-19 14:33:46,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2021-11-19 14:33:49,374 INFO L354 Elim1Store]: treesize reduction 1112, result has 8.8 percent of original size [2021-11-19 14:33:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 134 treesize of output 166 [2021-11-19 14:33:52,839 INFO L354 Elim1Store]: treesize reduction 1298, result has 8.3 percent of original size [2021-11-19 14:33:52,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 180 [2021-11-19 14:33:56,295 INFO L354 Elim1Store]: treesize reduction 1498, result has 7.8 percent of original size [2021-11-19 14:33:56,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 156 treesize of output 194 [2021-11-19 14:34:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:32,970 WARN L227 SmtUtils]: Spent 4.51m on a formula simplification. DAG size of input: 156 DAG size of output: 149 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:38:41,287 WARN L227 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-19 14:38:44,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2021-11-19 14:40:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 109 [2021-11-19 14:40:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 655343 treesize of output 655341 [2021-11-19 14:40:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:40:46,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077998087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:46,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:40:46,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 26, 22, 27, 22] total 82 [2021-11-19 14:40:46,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192084828] [2021-11-19 14:40:46,170 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:40:46,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-19 14:40:46,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-19 14:40:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=5085, Unknown=43, NotChecked=0, Total=6642 [2021-11-19 14:40:46,177 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 82 states, 80 states have (on average 1.2375) internal successors, (99), 79 states have internal predecessors, (99), 7 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10)