./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d67b4b463cf9b59771b705723a66a102d698cbc5859334aa26ed48a8838f7285 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:36:03,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:36:03,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:36:03,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:36:03,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:36:03,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:36:03,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:36:03,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:36:03,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:36:03,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:36:03,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:36:03,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:36:03,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:36:03,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:36:03,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:36:03,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:36:03,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:36:03,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:36:03,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:36:03,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:36:03,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:36:03,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:36:03,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:36:03,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:36:03,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:36:03,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:36:03,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:36:03,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:36:03,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:36:03,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:36:03,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:36:03,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:36:03,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:36:03,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:36:03,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:36:03,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:36:03,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:36:03,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:36:03,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:36:03,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:36:03,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:36:03,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:36:03,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:36:03,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:36:03,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:36:03,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:36:03,571 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:36:03,571 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:36:03,571 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:36:03,572 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:36:03,578 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:36:03,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:36:03,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:36:03,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:36:03,580 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:36:03,580 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:36:03,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:36:03,581 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:36:03,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:36:03,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:36:03,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:36:03,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:36:03,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:36:03,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:36:03,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:36:03,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:36:03,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:36:03,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:36:03,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:36:03,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:36:03,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:36:03,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:36:03,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:36:03,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:36:03,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:36:03,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:36:03,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:36:03,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:36:03,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:36:03,588 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_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d67b4b463cf9b59771b705723a66a102d698cbc5859334aa26ed48a8838f7285 [2021-11-12 22:36:03,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:36:03,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:36:03,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:36:03,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:36:03,871 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:36:03,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i [2021-11-12 22:36:03,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/b5d07542f/67746fdb4fba4211ad60c726e6ba6d26/FLAG51008c96d [2021-11-12 22:36:04,676 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:36:04,677 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i [2021-11-12 22:36:04,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/b5d07542f/67746fdb4fba4211ad60c726e6ba6d26/FLAG51008c96d [2021-11-12 22:36:04,757 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/b5d07542f/67746fdb4fba4211ad60c726e6ba6d26 [2021-11-12 22:36:04,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:36:04,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:36:04,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:36:04,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:36:04,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:36:04,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:36:04" (1/1) ... [2021-11-12 22:36:04,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4afacf34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:04, skipping insertion in model container [2021-11-12 22:36:04,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:36:04" (1/1) ... [2021-11-12 22:36:04,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:36:04,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:36:05,164 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4531,4544] [2021-11-12 22:36:05,170 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4591,4604] [2021-11-12 22:36:05,188 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:36:05,193 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:36:06,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,168 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,168 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,169 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,171 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,196 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,206 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,208 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,211 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,214 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,215 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,216 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:06,519 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:36:06,521 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:36:06,524 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:36:06,525 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:36:06,527 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:36:06,530 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:36:06,533 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:36:06,535 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:36:06,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:36:06,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:36:06,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:36:06,676 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) [2021-11-12 22:36:06,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ec71c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:06, skipping insertion in model container [2021-11-12 22:36:06,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:36:06,678 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:36:06,680 INFO L158 Benchmark]: Toolchain (without parser) took 1917.45ms. Allocated memory is still 104.9MB. Free memory was 63.9MB in the beginning and 58.6MB in the end (delta: 5.3MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2021-11-12 22:36:06,681 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:36:06,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1914.77ms. Allocated memory is still 104.9MB. Free memory was 63.7MB in the beginning and 58.6MB in the end (delta: 5.1MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2021-11-12 22:36:06,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1914.77ms. Allocated memory is still 104.9MB. Free memory was 63.7MB in the beginning and 58.6MB in the end (delta: 5.1MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5917]: 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_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d67b4b463cf9b59771b705723a66a102d698cbc5859334aa26ed48a8838f7285 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:36:09,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:36:09,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:36:09,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:36:09,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:36:09,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:36:09,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:36:09,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:36:09,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:36:09,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:36:09,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:36:09,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:36:09,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:36:09,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:36:09,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:36:09,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:36:09,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:36:09,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:36:09,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:36:09,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:36:09,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:36:09,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:36:09,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:36:09,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:36:09,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:36:09,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:36:09,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:36:09,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:36:09,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:36:09,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:36:09,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:36:09,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:36:09,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:36:09,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:36:09,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:36:09,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:36:09,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:36:09,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:36:09,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:36:09,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:36:09,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:36:09,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:36:09,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:36:09,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:36:09,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:36:09,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:36:09,205 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:36:09,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:36:09,205 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:36:09,206 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:36:09,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:36:09,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:36:09,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:36:09,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:36:09,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:36:09,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:36:09,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:36:09,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:36:09,211 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:36:09,211 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:36:09,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:36:09,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:36:09,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:36:09,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:36:09,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:36:09,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:36:09,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:36:09,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:36:09,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:36:09,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:36:09,214 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:36:09,214 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:09,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:36:09,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:36:09,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:36:09,216 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_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d67b4b463cf9b59771b705723a66a102d698cbc5859334aa26ed48a8838f7285 [2021-11-12 22:36:09,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:36:09,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:36:09,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:36:09,676 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:36:09,677 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:36:09,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i [2021-11-12 22:36:09,756 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/95592b8b9/924b7b8a91cb41feb71be7e730976cd5/FLAGc98233439 [2021-11-12 22:36:10,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:36:10,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i [2021-11-12 22:36:10,564 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/95592b8b9/924b7b8a91cb41feb71be7e730976cd5/FLAGc98233439 [2021-11-12 22:36:10,654 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/data/95592b8b9/924b7b8a91cb41feb71be7e730976cd5 [2021-11-12 22:36:10,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:36:10,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:36:10,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:36:10,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:36:10,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:36:10,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c51837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:10, skipping insertion in model container [2021-11-12 22:36:10,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:36:10" (1/1) ... [2021-11-12 22:36:10,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:36:10,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:36:11,024 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4531,4544] [2021-11-12 22:36:11,030 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4591,4604] [2021-11-12 22:36:11,049 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:36:11,056 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:36:12,244 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,246 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,247 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,249 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,250 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,275 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,276 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,278 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,279 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,281 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,282 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,283 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,283 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,517 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:36:12,519 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:36:12,521 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:36:12,522 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:36:12,524 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:36:12,525 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:36:12,528 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:36:12,529 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:36:12,533 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:36:12,534 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:36:12,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:36:12,675 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:36:12,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:36:12,715 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4531,4544] [2021-11-12 22:36:12,715 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4591,4604] [2021-11-12 22:36:12,719 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:36:12,720 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:36:12,802 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,802 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,803 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,804 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,805 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,824 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,825 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,827 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,829 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,831 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,831 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,832 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,867 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:36:12,867 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:36:12,868 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:36:12,869 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:36:12,870 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:36:12,871 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:36:12,871 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:36:12,872 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:36:12,872 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:36:12,873 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:36:12,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:36:12,907 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:36:12,930 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4531,4544] [2021-11-12 22:36:12,937 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/sv-benchmarks/c/aws-c-common/memcpy_using_uint64_harness.i[4591,4604] [2021-11-12 22:36:12,940 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 22:36:12,951 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 22:36:12,992 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,993 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,993 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,994 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:12,994 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,002 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,003 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,004 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,005 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,005 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,005 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 22:36:13,026 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 22:36:13,027 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 22:36:13,028 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 22:36:13,029 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 22:36:13,029 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 22:36:13,030 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 22:36:13,030 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 22:36:13,031 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 22:36:13,031 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 22:36:13,049 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 22:36:13,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:36:13,270 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:36:13,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13 WrapperNode [2021-11-12 22:36:13,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:36:13,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:36:13,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:36:13,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:36:13,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:36:13,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:36:13,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:36:13,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:36:13,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:36:13,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:36:13,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:36:13,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:36:13,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (1/1) ... [2021-11-12 22:36:13,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:36:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:13,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:36:13,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:36:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:36:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:36:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:36:13,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:36:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:36:13,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:36:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:36:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:36:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:36:13,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:36:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:36:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:36:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:36:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 22:36:13,530 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 22:36:14,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:36:14,327 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 22:36:14,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:36:14 BoogieIcfgContainer [2021-11-12 22:36:14,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:36:14,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:36:14,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:36:14,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:36:14,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:36:10" (1/3) ... [2021-11-12 22:36:14,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659c647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:36:14, skipping insertion in model container [2021-11-12 22:36:14,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:36:13" (2/3) ... [2021-11-12 22:36:14,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659c647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:36:14, skipping insertion in model container [2021-11-12 22:36:14,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:36:14" (3/3) ... [2021-11-12 22:36:14,337 INFO L111 eAbstractionObserver]: Analyzing ICFG memcpy_using_uint64_harness.i [2021-11-12 22:36:14,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:36:14,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:36:14,387 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:36:14,393 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 [2021-11-12 22:36:14,393 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:36:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 48 states have internal predecessors, (64), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-12 22:36:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 22:36:14,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:14,417 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:14,418 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1463681059, now seen corresponding path program 1 times [2021-11-12 22:36:14,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:14,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294489269] [2021-11-12 22:36:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:14,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:14,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:14,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:36:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:36:14,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 22:36:14,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:36:15,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:15,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294489269] [2021-11-12 22:36:15,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294489269] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:15,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:36:15,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 22:36:15,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767503085] [2021-11-12 22:36:15,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:15,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:36:15,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:36:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:36:15,162 INFO L87 Difference]: Start difference. First operand has 63 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 48 states have internal predecessors, (64), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:36:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:15,201 INFO L93 Difference]: Finished difference Result 122 states and 176 transitions. [2021-11-12 22:36:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:36:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-11-12 22:36:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:15,219 INFO L225 Difference]: With dead ends: 122 [2021-11-12 22:36:15,219 INFO L226 Difference]: Without dead ends: 57 [2021-11-12 22:36:15,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:36:15,229 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:15,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:36:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-12 22:36:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-12 22:36:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 43 states have internal predecessors, (53), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:36:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2021-11-12 22:36:15,287 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 66 [2021-11-12 22:36:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:15,287 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2021-11-12 22:36:15,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 22:36:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2021-11-12 22:36:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 22:36:15,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:15,294 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:15,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:15,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:15,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1147031271, now seen corresponding path program 1 times [2021-11-12 22:36:15,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:15,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643213793] [2021-11-12 22:36:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:15,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:15,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:15,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:36:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:36:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:15,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:16,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:16,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643213793] [2021-11-12 22:36:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643213793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:16,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:16,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:36:16,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277878723] [2021-11-12 22:36:16,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:16,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:36:16,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:36:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:36:16,071 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:36:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:16,130 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2021-11-12 22:36:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:36:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 66 [2021-11-12 22:36:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:16,132 INFO L225 Difference]: With dead ends: 113 [2021-11-12 22:36:16,132 INFO L226 Difference]: Without dead ends: 60 [2021-11-12 22:36:16,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:36:16,134 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.97ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:16,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 8 Unknown, 0 Unchecked, 5.97ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 23.53ms Time] [2021-11-12 22:36:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-12 22:36:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-12 22:36:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:36:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2021-11-12 22:36:16,145 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 66 [2021-11-12 22:36:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:16,145 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2021-11-12 22:36:16,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:36:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2021-11-12 22:36:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:16,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:16,147 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:16,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:16,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:16,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 199368683, now seen corresponding path program 1 times [2021-11-12 22:36:16,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:16,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460792672] [2021-11-12 22:36:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:16,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:16,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:16,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:36:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:16,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:16,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:16,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460792672] [2021-11-12 22:36:16,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460792672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:16,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1106756334] [2021-11-12 22:36:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:16,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:16,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:16,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:17,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:36:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:17,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1106756334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:17,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857188679] [2021-11-12 22:36:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:17,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:17,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:17,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:36:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:17,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:18,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:18,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857188679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:18,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:36:18,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 21 [2021-11-12 22:36:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121019238] [2021-11-12 22:36:18,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:36:18,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:36:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:18,983 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:19,987 INFO L93 Difference]: Finished difference Result 183 states and 238 transitions. [2021-11-12 22:36:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:36:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2021-11-12 22:36:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:19,991 INFO L225 Difference]: With dead ends: 183 [2021-11-12 22:36:19,992 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 22:36:19,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:36:19,994 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 211 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 470.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.65ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 597.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:19,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 739 Invalid, 359 Unknown, 0 Unchecked, 12.65ms Time], IncrementalHoareTripleChecker [54 Valid, 224 Invalid, 0 Unknown, 81 Unchecked, 597.76ms Time] [2021-11-12 22:36:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 22:36:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 72. [2021-11-12 22:36:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 55 states have internal predecessors, (68), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2021-11-12 22:36:20,016 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 70 [2021-11-12 22:36:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:20,019 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2021-11-12 22:36:20,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2021-11-12 22:36:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:20,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:20,024 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:20,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:20,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:20,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:20,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:20,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1489575059, now seen corresponding path program 1 times [2021-11-12 22:36:20,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:20,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471848673] [2021-11-12 22:36:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:20,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:20,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:20,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:36:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:20,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:20,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:21,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:21,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471848673] [2021-11-12 22:36:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471848673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:21,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1128053341] [2021-11-12 22:36:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:21,182 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:21,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:21,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:36:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:21,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:21,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1128053341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:21,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727141682] [2021-11-12 22:36:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:21,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:21,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:21,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:36:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:21,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:22,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727141682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:22,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:36:22,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 21 [2021-11-12 22:36:22,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540712372] [2021-11-12 22:36:22,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:36:22,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:36:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:22,951 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:23,864 INFO L93 Difference]: Finished difference Result 183 states and 237 transitions. [2021-11-12 22:36:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:36:23,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2021-11-12 22:36:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:23,867 INFO L225 Difference]: With dead ends: 183 [2021-11-12 22:36:23,867 INFO L226 Difference]: Without dead ends: 150 [2021-11-12 22:36:23,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:36:23,869 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 205 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 517.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.12ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 597.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:23,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 789 Invalid, 404 Unknown, 0 Unchecked, 8.12ms Time], IncrementalHoareTripleChecker [66 Valid, 261 Invalid, 0 Unknown, 77 Unchecked, 597.40ms Time] [2021-11-12 22:36:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-12 22:36:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 76. [2021-11-12 22:36:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 59 states have internal predecessors, (73), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2021-11-12 22:36:23,884 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 70 [2021-11-12 22:36:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:23,884 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2021-11-12 22:36:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2021-11-12 22:36:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:23,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:23,887 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:23,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:24,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:24,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:36:24,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:24,490 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1217044335, now seen corresponding path program 1 times [2021-11-12 22:36:24,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:24,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923919881] [2021-11-12 22:36:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:24,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:24,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:24,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:24,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:36:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:24,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:25,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:25,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923919881] [2021-11-12 22:36:25,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923919881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:25,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1581466953] [2021-11-12 22:36:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:25,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:25,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:25,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:36:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:25,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:25,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1581466953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:25,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111665271] [2021-11-12 22:36:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:25,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:25,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:25,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 22:36:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:26,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:26,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111665271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:26,845 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:36:26,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 21 [2021-11-12 22:36:26,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924514639] [2021-11-12 22:36:26,845 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:26,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:36:26,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:36:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:26,848 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:27,692 INFO L93 Difference]: Finished difference Result 184 states and 237 transitions. [2021-11-12 22:36:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:36:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2021-11-12 22:36:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:27,697 INFO L225 Difference]: With dead ends: 184 [2021-11-12 22:36:27,697 INFO L226 Difference]: Without dead ends: 153 [2021-11-12 22:36:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:36:27,699 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 157 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 405.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.40ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 480.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:27,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 920 Invalid, 339 Unknown, 0 Unchecked, 8.40ms Time], IncrementalHoareTripleChecker [45 Valid, 185 Invalid, 0 Unknown, 109 Unchecked, 480.32ms Time] [2021-11-12 22:36:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-12 22:36:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 80. [2021-11-12 22:36:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 63 states have internal predecessors, (78), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2021-11-12 22:36:27,725 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 70 [2021-11-12 22:36:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:27,729 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2021-11-12 22:36:27,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2021-11-12 22:36:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:27,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:27,736 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:27,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:27,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:28,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:28,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:28,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -62819343, now seen corresponding path program 1 times [2021-11-12 22:36:28,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:28,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135049781] [2021-11-12 22:36:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:28,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:28,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:28,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:28,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:36:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:28,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:28,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:28,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:28,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135049781] [2021-11-12 22:36:28,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135049781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:28,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710297583] [2021-11-12 22:36:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:28,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:28,895 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:28,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:36:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:29,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:29,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710297583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:29,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013045268] [2021-11-12 22:36:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:29,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:29,551 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:29,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:36:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:29,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:30,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:30,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013045268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:30,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:36:30,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 21 [2021-11-12 22:36:30,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532211871] [2021-11-12 22:36:30,795 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:30,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:36:30,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:30,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:36:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:30,797 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:31,686 INFO L93 Difference]: Finished difference Result 184 states and 236 transitions. [2021-11-12 22:36:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:36:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2021-11-12 22:36:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:31,689 INFO L225 Difference]: With dead ends: 184 [2021-11-12 22:36:31,689 INFO L226 Difference]: Without dead ends: 155 [2021-11-12 22:36:31,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:36:31,691 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 133 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 436.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.87ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 534.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:31,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 868 Invalid, 336 Unknown, 0 Unchecked, 5.87ms Time], IncrementalHoareTripleChecker [44 Valid, 228 Invalid, 0 Unknown, 64 Unchecked, 534.35ms Time] [2021-11-12 22:36:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-12 22:36:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-11-12 22:36:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 67 states have internal predecessors, (83), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-11-12 22:36:31,704 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 70 [2021-11-12 22:36:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:31,705 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-11-12 22:36:31,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-11-12 22:36:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:31,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:31,706 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:31,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:31,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-12 22:36:32,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:32,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:32,327 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash -649625357, now seen corresponding path program 1 times [2021-11-12 22:36:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:32,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998214885] [2021-11-12 22:36:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:32,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:32,329 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:32,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:36:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:32,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:32,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:32,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998214885] [2021-11-12 22:36:32,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998214885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:32,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552923985] [2021-11-12 22:36:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:32,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:32,822 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:32,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:36:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:33,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552923985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:33,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124972102] [2021-11-12 22:36:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:33,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:33,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:33,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:36:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:33,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:34,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:34,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124972102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:34,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:36:34,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 21 [2021-11-12 22:36:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531174997] [2021-11-12 22:36:34,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:34,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:36:34,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:36:34,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:34,499 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:35,404 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2021-11-12 22:36:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:36:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2021-11-12 22:36:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:35,407 INFO L225 Difference]: With dead ends: 183 [2021-11-12 22:36:35,407 INFO L226 Difference]: Without dead ends: 156 [2021-11-12 22:36:35,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:36:35,408 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 240 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 442.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.69ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 512.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:35,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 645 Invalid, 376 Unknown, 0 Unchecked, 4.69ms Time], IncrementalHoareTripleChecker [80 Valid, 211 Invalid, 0 Unknown, 85 Unchecked, 512.31ms Time] [2021-11-12 22:36:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-12 22:36:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 88. [2021-11-12 22:36:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2021-11-12 22:36:35,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 70 [2021-11-12 22:36:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:35,421 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2021-11-12 22:36:35,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2021-11-12 22:36:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:35,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:35,423 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:35,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:35,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:35,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-12 22:36:36,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:36,032 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 51439221, now seen corresponding path program 1 times [2021-11-12 22:36:36,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:36,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053464981] [2021-11-12 22:36:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:36,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:36,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:36,034 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:36,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:36:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:36,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:36,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:36,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053464981] [2021-11-12 22:36:36,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053464981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:36,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664554182] [2021-11-12 22:36:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:36,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:36,543 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:36,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:36:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:36,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:37,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1664554182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:37,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612063868] [2021-11-12 22:36:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:37,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:37,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:37,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:37,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:36:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:37,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:38,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612063868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:38,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:36:38,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 21 [2021-11-12 22:36:38,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459905936] [2021-11-12 22:36:38,225 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:38,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:36:38,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:36:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:38,227 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:38,830 INFO L93 Difference]: Finished difference Result 164 states and 207 transitions. [2021-11-12 22:36:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:36:38,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2021-11-12 22:36:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:38,833 INFO L225 Difference]: With dead ends: 164 [2021-11-12 22:36:38,833 INFO L226 Difference]: Without dead ends: 139 [2021-11-12 22:36:38,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:36:38,835 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 56 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 366.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 426.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:38,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 738 Invalid, 231 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [16 Valid, 177 Invalid, 0 Unknown, 38 Unchecked, 426.74ms Time] [2021-11-12 22:36:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-12 22:36:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-11-12 22:36:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.25) internal successors, (120), 97 states have internal predecessors, (120), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:36:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-11-12 22:36:38,847 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 70 [2021-11-12 22:36:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:38,848 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-11-12 22:36:38,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-12 22:36:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-11-12 22:36:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:36:38,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:38,850 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:38,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:39,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:39,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:39,463 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 731497591, now seen corresponding path program 1 times [2021-11-12 22:36:39,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:39,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807118110] [2021-11-12 22:36:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:39,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:39,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:39,466 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:39,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:36:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:39,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:39,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807118110] [2021-11-12 22:36:39,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807118110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:39,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574674702] [2021-11-12 22:36:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:39,882 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:39,883 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:36:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:40,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:40,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574674702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:40,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734577178] [2021-11-12 22:36:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:40,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:40,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:40,447 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:40,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 22:36:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:40,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:36:40,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734577178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:40,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:40,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 22:36:40,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449338840] [2021-11-12 22:36:40,891 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:40,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:36:40,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:40,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:36:40,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:36:40,892 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:36:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:41,044 INFO L93 Difference]: Finished difference Result 235 states and 310 transitions. [2021-11-12 22:36:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:36:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 70 [2021-11-12 22:36:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:41,048 INFO L225 Difference]: With dead ends: 235 [2021-11-12 22:36:41,048 INFO L226 Difference]: Without dead ends: 125 [2021-11-12 22:36:41,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:36:41,051 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.89ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:41,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 352 Invalid, 36 Unknown, 0 Unchecked, 0.89ms Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 97.02ms Time] [2021-11-12 22:36:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-12 22:36:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-12 22:36:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.2307692307692308) internal successors, (128), 105 states have internal predecessors, (128), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:36:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2021-11-12 22:36:41,069 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 70 [2021-11-12 22:36:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:41,069 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2021-11-12 22:36:41,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:36:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2021-11-12 22:36:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 22:36:41,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:41,073 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:41,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:41,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:41,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-12 22:36:41,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:41,688 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:41,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:41,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1086717825, now seen corresponding path program 2 times [2021-11-12 22:36:41,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:41,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801664934] [2021-11-12 22:36:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:41,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:41,690 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:41,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:36:41,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:36:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:36:41,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:36:42,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:36:42,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:42,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801664934] [2021-11-12 22:36:42,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801664934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:42,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:42,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:36:42,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086240891] [2021-11-12 22:36:42,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:42,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:36:42,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:36:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:36:42,690 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 22:36:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:42,800 INFO L93 Difference]: Finished difference Result 131 states and 166 transitions. [2021-11-12 22:36:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 78 [2021-11-12 22:36:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:42,803 INFO L225 Difference]: With dead ends: 131 [2021-11-12 22:36:42,803 INFO L226 Difference]: Without dead ends: 127 [2021-11-12 22:36:42,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:36:42,804 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 29 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:42,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 279 Invalid, 38 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 70.41ms Time] [2021-11-12 22:36:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-12 22:36:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-12 22:36:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 106 states have internal predecessors, (129), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:36:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2021-11-12 22:36:42,818 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 78 [2021-11-12 22:36:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:42,819 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2021-11-12 22:36:42,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 22:36:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2021-11-12 22:36:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 22:36:42,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:42,822 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:42,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 22:36:43,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:43,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1183676692, now seen corresponding path program 1 times [2021-11-12 22:36:43,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:43,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97299774] [2021-11-12 22:36:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:43,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:43,038 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:43,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:36:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:36:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:36:43,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 22:36:43,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:43,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97299774] [2021-11-12 22:36:43,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97299774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:43,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760303390] [2021-11-12 22:36:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:43,732 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:43,733 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:43,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:36:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:43,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:36:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:36:44,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-12 22:36:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760303390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:44,658 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:44,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9, 9] total 23 [2021-11-12 22:36:44,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239449868] [2021-11-12 22:36:44,658 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:44,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:36:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:36:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:36:44,660 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-12 22:36:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:44,948 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2021-11-12 22:36:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 95 [2021-11-12 22:36:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:44,951 INFO L225 Difference]: With dead ends: 152 [2021-11-12 22:36:44,951 INFO L226 Difference]: Without dead ends: 98 [2021-11-12 22:36:44,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:36:44,952 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 194 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 149.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:44,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 237 Invalid, 71 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [27 Valid, 38 Invalid, 0 Unknown, 6 Unchecked, 149.65ms Time] [2021-11-12 22:36:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-12 22:36:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-12 22:36:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2021-11-12 22:36:44,962 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 95 [2021-11-12 22:36:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:44,963 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2021-11-12 22:36:44,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-12 22:36:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2021-11-12 22:36:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:36:44,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:44,965 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:44,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:45,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:45,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:45,368 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1629378004, now seen corresponding path program 1 times [2021-11-12 22:36:45,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:45,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413617593] [2021-11-12 22:36:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:45,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:45,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:45,371 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:45,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:36:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:36:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:36:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:36:46,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:46,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413617593] [2021-11-12 22:36:46,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413617593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:46,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547292946] [2021-11-12 22:36:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:46,219 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:46,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:46,220 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:46,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:36:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:36:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:36:46,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:36:46,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547292946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:46,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210528078] [2021-11-12 22:36:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:46,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:46,962 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:46,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 22:36:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:36:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:36:47,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:36:47,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210528078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:47,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-12 22:36:47,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080659329] [2021-11-12 22:36:47,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:47,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:36:47,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:36:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:36:47,515 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 1 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:36:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:48,066 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2021-11-12 22:36:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:36:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 1 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 97 [2021-11-12 22:36:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:48,069 INFO L225 Difference]: With dead ends: 197 [2021-11-12 22:36:48,069 INFO L226 Difference]: Without dead ends: 114 [2021-11-12 22:36:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:36:48,071 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 14 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 226.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:48,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 702 Invalid, 141 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [14 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 270.09ms Time] [2021-11-12 22:36:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-12 22:36:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-12 22:36:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2021-11-12 22:36:48,084 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 97 [2021-11-12 22:36:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:48,084 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2021-11-12 22:36:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 1 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:36:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2021-11-12 22:36:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:36:48,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:48,087 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:48,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:48,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:48,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:48,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:48,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:48,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1230035908, now seen corresponding path program 2 times [2021-11-12 22:36:48,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:48,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508315193] [2021-11-12 22:36:48,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:48,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:48,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:48,693 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:48,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:36:48,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:36:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:36:48,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:36:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:36:50,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:50,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508315193] [2021-11-12 22:36:50,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508315193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:50,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1259984405] [2021-11-12 22:36:50,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:50,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:50,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:50,172 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:50,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:36:50,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:36:50,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:36:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:36:50,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:36:51,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1259984405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:51,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294662684] [2021-11-12 22:36:51,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:51,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:51,171 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:51,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 22:36:51,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:36:51,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:36:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:36:51,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:36:51,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294662684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:51,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:51,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-11-12 22:36:51,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246710485] [2021-11-12 22:36:51,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:51,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:36:51,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:36:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:36:51,869 INFO L87 Difference]: Start difference. First operand 114 states and 139 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 1 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:36:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:54,566 INFO L93 Difference]: Finished difference Result 229 states and 294 transitions. [2021-11-12 22:36:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 22:36:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 1 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 113 [2021-11-12 22:36:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:54,569 INFO L225 Difference]: With dead ends: 229 [2021-11-12 22:36:54,569 INFO L226 Difference]: Without dead ends: 146 [2021-11-12 22:36:54,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 22:36:54,571 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 888.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1062.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:54,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1122 Invalid, 539 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [30 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1062.52ms Time] [2021-11-12 22:36:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-12 22:36:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-12 22:36:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 128 states have (on average 1.125) internal successors, (144), 128 states have internal predecessors, (144), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:36:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2021-11-12 22:36:54,581 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 113 [2021-11-12 22:36:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:54,581 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2021-11-12 22:36:54,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 1 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:36:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2021-11-12 22:36:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:36:54,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:54,584 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:54,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-12 22:36:54,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 22:36:54,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:55,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:55,195 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:55,196 INFO L85 PathProgramCache]: Analyzing trace with hash 473450404, now seen corresponding path program 3 times [2021-11-12 22:36:55,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:55,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757622068] [2021-11-12 22:36:55,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:36:55,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:55,197 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:55,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:36:55,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-12 22:36:55,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-12 22:36:55,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:55,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:36:55,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-12 22:36:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-12 22:36:58,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-12 22:37:01,344 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_19| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_1|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_19|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_19| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_1|)))) is different from true [2021-11-12 22:37:03,663 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_20| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_2| (_ BitVec 64))) (and (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_20| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_2|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_20|) (_ bv0 64))))) is different from true [2021-11-12 22:37:06,004 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_21| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_3| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_21|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_3|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_21| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_3|)))) is different from true [2021-11-12 22:37:07,989 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-12 22:37:07,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-11-12 22:37:11,218 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2|) (_ bv0 64)) .cse0) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|) (_ bv0 64)) .cse0)))) is different from true [2021-11-12 22:37:13,872 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|)) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3|) (_ bv0 64)) .cse0) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|) (_ bv0 64)) .cse0)))) is different from true [2021-11-12 22:37:16,684 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|) (_ bv0 64)) .cse0) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|))))) is different from true [2021-11-12 22:37:25,751 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-11-12 22:37:25,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 40 [2021-11-12 22:37:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 915 trivial. 35 not checked. [2021-11-12 22:37:25,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-11-12 22:37:44,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757622068] [2021-11-12 22:37:44,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757622068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:44,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223262871] [2021-11-12 22:37:44,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:37:44,911 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:44,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:44,922 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:44,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 22:37:45,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-12 22:37:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-12 22:37:45,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:45,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:37:45,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-12 22:37:47,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-12 22:37:48,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-12 22:37:51,407 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_32| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_7| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_7|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_32|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_32| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_7|)))) is different from true [2021-11-12 22:37:53,865 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_33| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_8|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_33|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_33| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_8|)))) is different from true [2021-11-12 22:37:56,473 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_9| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_34| (_ BitVec 64))) (and (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_34| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_9|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_34|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_9|) (_ bv0 64))))) is different from true [2021-11-12 22:37:58,950 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-12 22:37:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-11-12 22:38:02,071 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|)) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|) (_ bv0 64)) .cse0)))) is different from true [2021-11-12 22:38:04,691 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|) (_ bv0 64)) .cse0) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|))))) is different from true [2021-11-12 22:38:07,290 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10|) (_ bv0 64)) .cse0)))) is different from true [2021-11-12 22:38:10,070 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-11-12 22:38:10,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 40 [2021-11-12 22:38:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 924 trivial. 26 not checked. [2021-11-12 22:38:10,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-11-12 22:39:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223262871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:15,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431146778] [2021-11-12 22:39:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:39:15,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:15,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:39:15,261 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:39:15,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 22:39:16,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-12 22:39:16,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:39:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-12 22:39:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:16,745 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 15 treesize of output 13 [2021-11-12 22:39:20,735 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-12 22:39:20,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-12 22:39:24,617 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-12 22:39:24,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-12 22:39:29,001 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14|) (_ bv0 64)))) (and (not (= (_ bv0 64) |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14|)) (= .cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64))) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|))))) is different from true [2021-11-12 22:39:32,136 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15|)) (= .cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64))) (not (= (_ bv0 64) |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15|) (_ bv0 64)) .cse0)))) is different from true [2021-11-12 22:39:35,184 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16|) (_ bv0 64)))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16|)) (= (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)) .cse0) (not (= (_ bv0 64) |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16|))))) is different from true [2021-11-12 22:39:38,487 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-11-12 22:39:38,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 52 [2021-11-12 22:39:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 28 proven. 90 refuted. 0 times theorem prover too weak. 895 trivial. 2 not checked. [2021-11-12 22:39:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:27,939 INFO L354 Elim1Store]: treesize reduction 86, result has 52.0 percent of original size [2021-11-12 22:40:27,939 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 4 new quantified variables, introduced 7 case distinctions, treesize of input 471 treesize of output 351 [2021-11-12 22:40:28,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:40:28,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 407 treesize of output 443 [2021-11-12 22:40:29,720 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 6 treesize of output 4 [2021-11-12 22:40:35,612 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 12 treesize of output 8 [2021-11-12 22:40:38,209 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 12 treesize of output 8 [2021-11-12 22:40:41,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:40:41,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-11-12 22:40:42,106 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 12 treesize of output 8 [2021-11-12 22:40:43,067 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 12 treesize of output 8 [2021-11-12 22:42:24,038 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 33 treesize of output 25 [2021-11-12 22:42:24,800 INFO L354 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2021-11-12 22:42:24,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 22:42:25,637 INFO L354 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2021-11-12 22:42:25,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 22:42:26,274 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 33 treesize of output 25 [2021-11-12 22:42:26,741 INFO L354 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2021-11-12 22:42:26,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 22:42:27,085 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 33 treesize of output 25 [2021-11-12 22:42:28,407 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:42:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2021-11-12 22:42:29,029 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-12 22:42:29,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 76 [2021-11-12 22:42:31,449 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 18 treesize of output 14 [2021-11-12 22:42:31,691 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 33 treesize of output 25 [2021-11-12 22:42:32,761 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 33 treesize of output 25 [2021-11-12 22:42:33,475 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:42:33,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2021-11-12 22:42:34,167 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-12 22:42:34,244 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 33 treesize of output 25 [2021-11-12 22:42:35,272 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 33 treesize of output 25 [2021-11-12 22:42:35,910 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:42:35,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2021-11-12 22:42:36,149 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 18 treesize of output 14 [2021-11-12 22:42:56,043 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-12 22:42:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:42:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 8 [2021-11-12 22:42:57,719 INFO L354 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2021-11-12 22:42:57,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 26 [2021-11-12 22:42:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:42:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-12 22:42:58,727 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-12 22:42:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:42:58,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-12 22:42:59,042 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-12 22:42:59,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:42:59,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-12 22:43:01,042 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-12 22:43:01,406 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-12 22:43:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 8 [2021-11-12 22:43:24,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:24,888 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 11 treesize of output 7 [2021-11-12 22:43:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:25,312 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 11 treesize of output 7 [2021-11-12 22:43:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:25,425 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:43:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-12 22:43:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:25,730 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 19 treesize of output 11 [2021-11-12 22:43:25,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:25,987 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 19 treesize of output 11 [2021-11-12 22:43:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:26,152 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:43:26,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-11-12 22:43:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:28,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:43:28,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 83 [2021-11-12 22:43:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:29,779 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:43:29,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-11-12 22:43:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:30,596 INFO L354 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2021-11-12 22:43:30,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 65 [2021-11-12 22:43:38,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:38,439 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 11 treesize of output 7 [2021-11-12 22:43:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:38,630 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-12 22:43:38,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-12 22:43:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2021-11-12 22:43:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:45,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:43:45,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 235 [2021-11-12 22:43:47,474 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 12 treesize of output 8 [2021-11-12 22:43:47,820 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 12 treesize of output 8 [2021-11-12 22:43:48,508 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 12 treesize of output 8 [2021-11-12 22:43:48,878 INFO L354 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2021-11-12 22:43:48,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-12 22:43:49,187 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 12 treesize of output 8 [2021-11-12 22:43:49,956 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 6 treesize of output 4 [2021-11-12 22:43:50,153 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 6 treesize of output 4 [2021-11-12 22:43:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:51,329 INFO L354 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2021-11-12 22:43:51,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 33 [2021-11-12 22:43:51,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:51,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-11-12 22:43:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:52,054 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-12 22:43:52,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 1 [2021-11-12 22:43:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:53,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-11-12 22:43:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:53,347 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 20 treesize of output 16 [2021-11-12 22:43:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:53,437 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 20 treesize of output 16 [2021-11-12 22:43:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:55,633 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 38 treesize of output 36 [2021-11-12 22:43:55,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:43:56,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:43:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 137 [2021-11-12 22:44:19,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:44:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 521 treesize of output 501 [2021-11-12 22:45:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2021-11-12 22:45:52,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431146778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:45:52,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:45:52,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21, 26, 19, 28, 22] total 94 [2021-11-12 22:45:52,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536788021] [2021-11-12 22:45:52,633 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:45:52,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-12 22:45:52,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-12 22:45:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=5773, Unknown=60, NotChecked=2520, Total=8742 [2021-11-12 22:45:52,638 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand has 94 states, 91 states have (on average 2.21978021978022) internal successors, (202), 82 states have internal predecessors, (202), 19 states have call successors, (47), 18 states have call predecessors, (47), 18 states have return successors, (47), 20 states have call predecessors, (47), 18 states have call successors, (47) [2021-11-12 22:46:03,206 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_32| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_7| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_7|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_32|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_32| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_7|)))) (exists ((|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_19| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_1|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_19|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_19| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_1|))))) is different from true [2021-11-12 22:46:32,797 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_20| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_2| (_ BitVec 64))) (and (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_20| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_2|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_20|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_33| (_ BitVec 64))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_8|) (_ bv0 64)) (select (select |c_#memory_int| |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_33|) (_ bv0 64))) (not (= |v_ULTIMATE.start_memcpy_using_uint64_harness_~#d1~0#1.base_BEFORE_CALL_33| |v_ULTIMATE.start_memcpy_using_uint64_impl_~src#1.base_BEFORE_CALL_8|))))) is different from true [2021-11-12 22:46:50,433 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|)) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|) (_ bv0 64)) .cse0)))) (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse1 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14|) (_ bv0 64)))) (and (not (= (_ bv0 64) |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14|)) (= .cse1 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64))) (= .cse1 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_14| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_14| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|))))) (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse2 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2|) (_ bv0 64)) .cse2) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|) (_ bv0 64)) .cse2))))) is different from true [2021-11-12 22:46:52,457 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_15|)) (= .cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64))) (not (= (_ bv0 64) |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_15|) (_ bv0 64)) .cse0)))) (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse1 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|)) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3|) (_ bv0 64)) .cse1) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|) (_ bv0 64)) .cse1)))) (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse2 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|) (_ bv0 64)) .cse2) (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (= .cse2 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|)))))) is different from true [2021-11-12 22:46:54,468 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10|) (_ bv0 64)) .cse0)))) (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64))) (let ((.cse1 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16|) (_ bv0 64)))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16|) (_ bv0 64)) .cse1) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_16|)) (= (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)) .cse1) (not (= (_ bv0 64) |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_16|))))) (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4| (_ BitVec 64)) (|ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| (_ BitVec 64))) (let ((.cse2 (select (select |c_#memory_int| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|) (_ bv0 64)))) (and (not (= |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|) (_ bv0 64)) .cse2) (= .cse2 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| |ULTIMATE.start_memcpy_using_uint64_impl_~s~0#1.base|)) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|)))))) is different from true [2021-11-12 22:47:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:47:01,336 INFO L93 Difference]: Finished difference Result 203 states and 233 transitions. [2021-11-12 22:47:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 22:47:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 91 states have (on average 2.21978021978022) internal successors, (202), 82 states have internal predecessors, (202), 19 states have call successors, (47), 18 states have call predecessors, (47), 18 states have return successors, (47), 20 states have call predecessors, (47), 18 states have call successors, (47) Word has length 145 [2021-11-12 22:47:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:47:01,340 INFO L225 Difference]: With dead ends: 203 [2021-11-12 22:47:01,341 INFO L226 Difference]: Without dead ends: 179 [2021-11-12 22:47:01,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 751 SyntacticMatches, 28 SemanticMatches, 120 ConstructedPredicates, 20 IntricatePredicates, 0 DeprecatedPredicates, 4162 ImplicationChecksByTransitivity, 232.2s TimeCoverageRelationStatistics Valid=752, Invalid=9555, Unknown=75, NotChecked=4380, Total=14762 [2021-11-12 22:47:01,348 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 83 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1545.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.46ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2447 IncrementalHoareTripleChecker+Unchecked, 1778.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:47:01,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1057 Invalid, 2968 Unknown, 0 Unchecked, 11.46ms Time], IncrementalHoareTripleChecker [36 Valid, 485 Invalid, 0 Unknown, 2447 Unchecked, 1778.79ms Time] [2021-11-12 22:47:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-12 22:47:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2021-11-12 22:47:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:47:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2021-11-12 22:47:01,365 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 145 [2021-11-12 22:47:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:47:01,365 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2021-11-12 22:47:01,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 91 states have (on average 2.21978021978022) internal successors, (202), 82 states have internal predecessors, (202), 19 states have call successors, (47), 18 states have call predecessors, (47), 18 states have return successors, (47), 20 states have call predecessors, (47), 18 states have call successors, (47) [2021-11-12 22:47:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2021-11-12 22:47:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:47:01,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:47:01,368 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:47:01,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-12 22:47:01,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:47:01,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-12 22:47:01,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:47:01,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:47:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:47:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 535490018, now seen corresponding path program 1 times [2021-11-12 22:47:01,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:47:01,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368556496] [2021-11-12 22:47:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:47:01,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:47:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:47:01,985 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:47:01,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 22:47:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:47:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-12 22:47:02,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:47:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:47:03,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:47:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:47:06,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:47:06,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368556496] [2021-11-12 22:47:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368556496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:47:06,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885749674] [2021-11-12 22:47:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:47:06,588 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:47:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:47:06,589 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:47:06,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 22:47:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:47:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-12 22:47:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:47:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:47:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:47:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:47:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885749674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:47:07,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775980459] [2021-11-12 22:47:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:47:07,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:47:07,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:47:07,740 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:47:07,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-12 22:47:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:47:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:47:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:47:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 986 trivial. 0 not checked. [2021-11-12 22:47:09,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:47:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-12 22:47:12,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775980459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:47:12,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:47:12,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 10, 12] total 82 [2021-11-12 22:47:12,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476407217] [2021-11-12 22:47:12,354 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:47:12,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-12 22:47:12,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:47:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-12 22:47:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5489, Unknown=0, NotChecked=0, Total=6642 [2021-11-12 22:47:12,357 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand has 82 states, 82 states have (on average 2.6951219512195124) internal successors, (221), 82 states have internal predecessors, (221), 6 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 22:47:39,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:47:41,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:47:46,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:47:47,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:47:55,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:10,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:12,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:13,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:15,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:18,459 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:48:20,161 INFO L93 Difference]: Finished difference Result 377 states and 485 transitions. [2021-11-12 22:48:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-12 22:48:20,163 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.6951219512195124) internal successors, (221), 82 states have internal predecessors, (221), 6 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) Word has length 145 [2021-11-12 22:48:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:48:20,166 INFO L225 Difference]: With dead ends: 377 [2021-11-12 22:48:20,166 INFO L226 Difference]: Without dead ends: 286 [2021-11-12 22:48:20,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=3143, Invalid=10899, Unknown=0, NotChecked=0, Total=14042 [2021-11-12 22:48:20,172 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 201 mSDsluCounter, 4711 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48520.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 4831 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.82ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 50099.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:48:20,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 4831 Invalid, 4385 Unknown, 0 Unchecked, 18.82ms Time], IncrementalHoareTripleChecker [124 Valid, 3958 Invalid, 0 Unknown, 303 Unchecked, 50099.09ms Time] [2021-11-12 22:48:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-12 22:48:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 244. [2021-11-12 22:48:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 225 states have (on average 1.1244444444444444) internal successors, (253), 225 states have internal predecessors, (253), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 22:48:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 280 transitions. [2021-11-12 22:48:20,194 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 280 transitions. Word has length 145 [2021-11-12 22:48:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:48:20,195 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 280 transitions. [2021-11-12 22:48:20,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.6951219512195124) internal successors, (221), 82 states have internal predecessors, (221), 6 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 22:48:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 280 transitions. [2021-11-12 22:48:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 22:48:20,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:48:20,198 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:48:20,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:48:20,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-12 22:48:20,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-12 22:48:20,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:48:20,816 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:48:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:48:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash -330201232, now seen corresponding path program 1 times [2021-11-12 22:48:20,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:48:20,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182052519] [2021-11-12 22:48:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:48:20,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:48:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:48:20,819 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:48:20,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 22:48:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:48:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-12 22:48:21,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:48:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3959 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:48:24,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:48:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3959 backedges. 2 proven. 3844 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:48:37,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:48:37,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182052519] [2021-11-12 22:48:37,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182052519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:48:37,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222283874] [2021-11-12 22:48:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:48:37,679 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:48:37,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:48:37,682 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:48:37,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 22:48:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:48:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-12 22:48:38,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:48:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3959 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 22:48:38,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:48:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3959 backedges. 2 proven. 3844 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:48:39,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222283874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:48:39,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011688432] [2021-11-12 22:48:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:48:39,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:48:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:48:39,376 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:48:39,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f9c6230-8bff-4a7a-bbc3-38f09cb69202/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 22:48:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:48:39,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:48:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:48:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3959 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2021-11-12 22:48:41,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:48:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3959 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3956 trivial. 0 not checked. [2021-11-12 22:48:43,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011688432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:48:43,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:48:43,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65, 65, 8, 8] total 139 [2021-11-12 22:48:43,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044080841] [2021-11-12 22:48:43,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:48:43,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-12 22:48:43,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:48:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-12 22:48:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4261, Invalid=14921, Unknown=0, NotChecked=0, Total=19182 [2021-11-12 22:48:43,658 INFO L87 Difference]: Start difference. First operand 244 states and 280 transitions. Second operand has 139 states, 139 states have (on average 2.316546762589928) internal successors, (322), 139 states have internal predecessors, (322), 6 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33)