./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:17,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:17,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:17,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:17,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:17,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:17,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:17,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:17,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:17,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:17,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:17,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:17,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:17,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:17,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:17,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:17,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:17,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:17,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:17,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:17,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:17,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:17,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:17,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:17,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:17,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:17,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:17,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:17,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:17,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:17,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:17,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:17,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:17,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:17,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:17,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:17,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:17,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:17,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:17,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:17,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:17,585 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:07:17,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:17,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:17,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:17,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:17,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:17,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:17,641 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:17,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:07:17,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:17,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:17,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:07:17,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:07:17,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:17,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:07:17,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:07:17,652 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:07:17,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:17,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:07:17,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:17,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:17,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:17,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:17,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:17,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:17,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:17,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:17,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:17,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:17,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:17,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:17,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:17,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:17,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:07:17,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:07:17,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:17,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:17,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:17,661 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-11-12 23:07:18,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:18,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:18,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:18,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:18,079 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:18,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-12 23:07:18,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/5626b3091/d58a4e9b5f4644b592b28e8171cc01ac/FLAG357b989e3 [2021-11-12 23:07:19,126 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:19,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-12 23:07:19,202 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/5626b3091/d58a4e9b5f4644b592b28e8171cc01ac/FLAG357b989e3 [2021-11-12 23:07:19,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/5626b3091/d58a4e9b5f4644b592b28e8171cc01ac [2021-11-12 23:07:19,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:19,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:19,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:19,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:19,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:19,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:19" (1/1) ... [2021-11-12 23:07:19,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2378cb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:19, skipping insertion in model container [2021-11-12 23:07:19,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:19" (1/1) ... [2021-11-12 23:07:19,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:19,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:20,206 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-12 23:07:20,214 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-12 23:07:20,241 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:07:20,247 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:07:21,327 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:07:21,439 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,443 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,447 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,449 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,451 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,479 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,479 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,484 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,485 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,488 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,490 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,494 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,497 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:21,939 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:07:21,941 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:07:21,942 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:07:21,944 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:07:21,946 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:07:21,946 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:07:21,948 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:07:21,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:07:21,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:07:21,950 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:07:22,119 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:22,129 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:22,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:22,255 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 23:07:22,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1166cf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:22, skipping insertion in model container [2021-11-12 23:07:22,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:22,257 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:07:22,259 INFO L158 Benchmark]: Toolchain (without parser) took 2634.75ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 57.6MB in the beginning and 87.3MB in the end (delta: -29.8MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. [2021-11-12 23:07:22,260 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 72.9MB in the beginning and 72.9MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:07:22,261 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2628.89ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 57.4MB in the beginning and 87.3MB in the end (delta: -29.9MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. [2021-11-12 23:07:22,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 72.9MB in the beginning and 72.9MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2628.89ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 57.4MB in the beginning and 87.3MB in the end (delta: -29.9MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2886]: 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:25,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:25,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:25,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:25,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:25,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:25,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:25,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:25,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:25,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:25,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:25,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:25,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:25,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:25,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:25,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:25,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:25,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:25,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:25,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:25,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:25,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:25,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:25,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:25,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:25,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:25,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:25,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:25,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:25,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:25,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:25,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:25,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:25,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:25,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:25,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:25,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:25,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:25,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:25,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:25,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:25,186 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:07:25,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:25,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:25,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:25,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:25,240 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:25,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:25,242 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:25,242 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:25,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:25,243 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:25,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:25,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:25,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:25,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:25,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:25,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:25,247 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:07:25,248 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:07:25,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:25,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:25,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:25,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:25,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:07:25,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:25,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:25,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:25,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:25,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:25,252 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:07:25,252 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:25,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:25,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:25,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:25,254 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-11-12 23:07:25,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:25,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:25,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:25,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:25,798 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:25,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-12 23:07:25,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/a0ff92bae/362609817e734edb9bb6a47e15e7219b/FLAG004ed9260 [2021-11-12 23:07:26,971 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:26,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-11-12 23:07:27,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/a0ff92bae/362609817e734edb9bb6a47e15e7219b/FLAG004ed9260 [2021-11-12 23:07:27,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/data/a0ff92bae/362609817e734edb9bb6a47e15e7219b [2021-11-12 23:07:27,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:27,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:27,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:27,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:27,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:27,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:27" (1/1) ... [2021-11-12 23:07:27,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e456f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:27, skipping insertion in model container [2021-11-12 23:07:27,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:27" (1/1) ... [2021-11-12 23:07:27,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:27,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:27,907 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-12 23:07:27,916 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-12 23:07:27,955 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:07:27,964 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:07:29,088 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:07:29,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,183 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,184 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,185 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,202 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,205 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,206 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,208 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,209 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,210 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,211 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,705 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:07:29,706 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:07:29,708 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:07:29,709 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:07:29,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:07:29,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:07:29,713 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:07:29,714 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:07:29,715 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:07:29,716 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:07:29,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,897 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:29,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:30,013 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:07:30,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:30,063 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-12 23:07:30,063 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-12 23:07:30,065 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:07:30,066 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:07:30,120 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:07:30,162 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,163 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,164 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,165 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,174 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,186 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,190 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,192 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,194 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,195 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,195 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,196 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,269 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:07:30,270 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:07:30,271 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:07:30,278 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:07:30,280 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:07:30,281 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:07:30,281 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:07:30,282 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:07:30,283 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:07:30,283 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:07:30,314 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,348 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:30,437 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:07:30,463 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-11-12 23:07:30,471 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_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-11-12 23:07:30,473 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:07:30,481 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:07:30,527 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:07:30,555 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,556 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,556 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,567 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,568 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,569 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,570 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,575 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,576 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,588 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,588 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,631 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:07:30,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:07:30,633 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:07:30,634 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:07:30,635 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:07:30,635 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:07:30,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:07:30,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:07:30,638 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:07:30,639 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:07:30,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,718 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:07:30,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:31,155 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:07:31,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31 WrapperNode [2021-11-12 23:07:31,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:31,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:31,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:07:31,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:07:31,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:31,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:07:31,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:07:31,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:07:31,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:07:31,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:07:31,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:07:31,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:07:31,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (1/1) ... [2021-11-12 23:07:31,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:31,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:31,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:07:31,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:07:31,700 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-12 23:07:31,700 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-12 23:07:31,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:07:31,701 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-12 23:07:31,701 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-12 23:07:31,701 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-12 23:07:31,702 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-12 23:07:31,702 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-12 23:07:31,702 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-12 23:07:31,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:07:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:07:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:07:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-12 23:07:31,703 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-12 23:07:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:07:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:07:31,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:07:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-12 23:07:31,705 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-12 23:07:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:07:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:07:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-12 23:07:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-12 23:07:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-12 23:07:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-12 23:07:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:07:31,729 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:07:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:07:31,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:07:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:07:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-12 23:07:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:07:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:07:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:07:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-12 23:07:31,736 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-12 23:07:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-12 23:07:31,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-12 23:07:45,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:07:45,214 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 23:07:45,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:45 BoogieIcfgContainer [2021-11-12 23:07:45,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:07:45,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:07:45,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:07:45,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:07:45,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:07:27" (1/3) ... [2021-11-12 23:07:45,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a920b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:45, skipping insertion in model container [2021-11-12 23:07:45,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:31" (2/3) ... [2021-11-12 23:07:45,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a920b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:45, skipping insertion in model container [2021-11-12 23:07:45,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:45" (3/3) ... [2021-11-12 23:07:45,226 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-11-12 23:07:45,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:07:45,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:07:45,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:07:45,309 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 23:07:45,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:07:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 23:07:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-12 23:07:45,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:45,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:45,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash 213945854, now seen corresponding path program 1 times [2021-11-12 23:07:45,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:45,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271163775] [2021-11-12 23:07:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:45,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:45,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:45,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:07:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:49,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:07:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:07:49,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:07:49,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:49,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271163775] [2021-11-12 23:07:49,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271163775] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:49,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:49,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:07:49,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767767466] [2021-11-12 23:07:49,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:49,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:07:49,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:07:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:07:49,876 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:07:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:49,910 INFO L93 Difference]: Finished difference Result 221 states and 288 transitions. [2021-11-12 23:07:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:07:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-11-12 23:07:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:49,922 INFO L225 Difference]: With dead ends: 221 [2021-11-12 23:07:49,922 INFO L226 Difference]: Without dead ends: 107 [2021-11-12 23:07:49,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 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 23:07:49,931 INFO L933 BasicCegarLoop]: 137 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, 137 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:49,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:07:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-12 23:07:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-12 23:07:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-12 23:07:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-11-12 23:07:49,982 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-11-12 23:07:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:49,983 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-11-12 23:07:49,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:07:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-11-12 23:07:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:07:49,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:49,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:50,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:50,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:50,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1475951998, now seen corresponding path program 1 times [2021-11-12 23:07:50,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:50,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549711243] [2021-11-12 23:07:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:50,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:50,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:50,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:50,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:07:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:07:54,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:07:54,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:07:55,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:55,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549711243] [2021-11-12 23:07:55,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549711243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:55,224 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:55,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 23:07:55,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816786876] [2021-11-12 23:07:55,225 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:55,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:07:55,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:55,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:07:55,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:07:55,228 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:07:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:55,537 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2021-11-12 23:07:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:07:55,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 71 [2021-11-12 23:07:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:55,543 INFO L225 Difference]: With dead ends: 182 [2021-11-12 23:07:55,543 INFO L226 Difference]: Without dead ends: 109 [2021-11-12 23:07:55,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:55,546 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 49 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:55,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 314 Invalid, 33 Unknown, 0 Unchecked, 4.83ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 252.59ms Time] [2021-11-12 23:07:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-12 23:07:55,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-12 23:07:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-12 23:07:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-11-12 23:07:55,563 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-11-12 23:07:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:55,564 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-11-12 23:07:55,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:07:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-11-12 23:07:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:07:55,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:55,569 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:55,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:55,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:55,783 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1492369144, now seen corresponding path program 1 times [2021-11-12 23:07:55,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:55,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93198273] [2021-11-12 23:07:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:55,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:55,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:55,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:55,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:07:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:07:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:08:00,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:08:00,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:00,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93198273] [2021-11-12 23:08:00,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93198273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:00,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:00,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:08:00,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725199025] [2021-11-12 23:08:00,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:00,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:08:00,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:08:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:08:00,366 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:08:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:00,503 INFO L93 Difference]: Finished difference Result 189 states and 231 transitions. [2021-11-12 23:08:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 86 [2021-11-12 23:08:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:00,511 INFO L225 Difference]: With dead ends: 189 [2021-11-12 23:08:00,511 INFO L226 Difference]: Without dead ends: 114 [2021-11-12 23:08:00,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:00,513 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:00,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 377 Invalid, 13 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 97.24ms Time] [2021-11-12 23:08:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-12 23:08:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-11-12 23:08:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2) internal successors, (90), 76 states have internal predecessors, (90), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-12 23:08:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-11-12 23:08:00,533 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 86 [2021-11-12 23:08:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:00,534 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-11-12 23:08:00,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:08:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-11-12 23:08:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:08:00,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:00,537 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:00,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:00,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:00,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash 874325450, now seen corresponding path program 1 times [2021-11-12 23:08:00,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:00,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342260688] [2021-11-12 23:08:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:00,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:00,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:00,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:00,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:08:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:05,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:08:05,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:05,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342260688] [2021-11-12 23:08:05,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342260688] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:05,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:05,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:08:05,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577431010] [2021-11-12 23:08:05,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:05,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:08:05,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:05,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:08:05,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:05,813 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:08:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:05,910 INFO L93 Difference]: Finished difference Result 193 states and 233 transitions. [2021-11-12 23:08:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:08:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-12 23:08:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:05,913 INFO L225 Difference]: With dead ends: 193 [2021-11-12 23:08:05,913 INFO L226 Difference]: Without dead ends: 116 [2021-11-12 23:08:05,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:05,915 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:05,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 20 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 58.32ms Time] [2021-11-12 23:08:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-12 23:08:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-11-12 23:08:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-12 23:08:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2021-11-12 23:08:05,929 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 86 [2021-11-12 23:08:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:05,930 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2021-11-12 23:08:05,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:08:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2021-11-12 23:08:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:08:05,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:05,934 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:05,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:06,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:06,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash 261547704, now seen corresponding path program 1 times [2021-11-12 23:08:06,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:06,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129963738] [2021-11-12 23:08:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:06,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:06,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:06,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:08:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:10,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:08:10,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:10,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:08:10,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:10,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129963738] [2021-11-12 23:08:10,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129963738] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:10,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:10,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 23:08:10,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326692890] [2021-11-12 23:08:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:10,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:10,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:10,609 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:08:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:10,694 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2021-11-12 23:08:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:10,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-12 23:08:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:10,697 INFO L225 Difference]: With dead ends: 160 [2021-11-12 23:08:10,697 INFO L226 Difference]: Without dead ends: 120 [2021-11-12 23:08:10,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:10,699 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 4 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:10,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 517 Invalid, 19 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 52.38ms Time] [2021-11-12 23:08:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-12 23:08:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-11-12 23:08:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 80 states have internal predecessors, (94), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-12 23:08:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-11-12 23:08:10,720 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 86 [2021-11-12 23:08:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,721 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-11-12 23:08:10,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:08:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-11-12 23:08:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:08:10,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,723 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:10,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:10,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:10,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2061885074, now seen corresponding path program 1 times [2021-11-12 23:08:10,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:10,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070552604] [2021-11-12 23:08:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:10,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:10,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:10,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:08:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:15,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:15,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:08:15,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:15,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070552604] [2021-11-12 23:08:15,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070552604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:15,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98177541] [2021-11-12 23:08:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:15,856 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:15,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:15,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:08:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:17,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:08:17,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:08:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98177541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:17,936 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:17,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-12 23:08:17,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239489476] [2021-11-12 23:08:17,937 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:17,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:17,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:08:17,938 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:08:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:18,027 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-11-12 23:08:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:18,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 89 [2021-11-12 23:08:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:18,030 INFO L225 Difference]: With dead ends: 141 [2021-11-12 23:08:18,030 INFO L226 Difference]: Without dead ends: 118 [2021-11-12 23:08:18,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:08:18,032 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 4 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:18,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 384 Invalid, 11 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 49.62ms Time] [2021-11-12 23:08:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-12 23:08:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-12 23:08:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 82 states have internal predecessors, (96), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-12 23:08:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2021-11-12 23:08:18,044 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 89 [2021-11-12 23:08:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:18,045 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2021-11-12 23:08:18,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:08:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2021-11-12 23:08:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:08:18,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:18,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:18,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-12 23:08:18,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:18,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:18,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash 755434702, now seen corresponding path program 1 times [2021-11-12 23:08:18,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:18,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166157546] [2021-11-12 23:08:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:18,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:18,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:18,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:18,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:08:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:08:22,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:08:23,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:23,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166157546] [2021-11-12 23:08:23,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166157546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:23,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1300592767] [2021-11-12 23:08:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:23,120 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:23,121 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:23,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:08:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:08:27,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:08:27,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1300592767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:27,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313408049] [2021-11-12 23:08:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:27,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:27,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:27,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:08:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:08:29,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:08:29,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313408049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:29,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:08:29,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 23:08:29,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934048935] [2021-11-12 23:08:29,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:29,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:08:29,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:08:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:08:29,675 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:08:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:30,115 INFO L93 Difference]: Finished difference Result 218 states and 266 transitions. [2021-11-12 23:08:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2021-11-12 23:08:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:30,118 INFO L225 Difference]: With dead ends: 218 [2021-11-12 23:08:30,118 INFO L226 Difference]: Without dead ends: 133 [2021-11-12 23:08:30,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:08:30,120 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.06ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 246.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:30,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 743 Invalid, 65 Unknown, 0 Unchecked, 14.06ms Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 246.48ms Time] [2021-11-12 23:08:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-12 23:08:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2021-11-12 23:08:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-12 23:08:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2021-11-12 23:08:30,142 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 91 [2021-11-12 23:08:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:30,143 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2021-11-12 23:08:30,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:08:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2021-11-12 23:08:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 23:08:30,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:30,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:30,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:30,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-12 23:08:30,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:30,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:30,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -396927233, now seen corresponding path program 1 times [2021-11-12 23:08:30,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:30,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137500055] [2021-11-12 23:08:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:30,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:30,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:30,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:30,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:08:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:08:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:08:35,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:08:35,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:35,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137500055] [2021-11-12 23:08:35,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137500055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:35,452 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:35,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:08:35,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467435495] [2021-11-12 23:08:35,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:35,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:35,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:35,454 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:08:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:35,781 INFO L93 Difference]: Finished difference Result 181 states and 218 transitions. [2021-11-12 23:08:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 94 [2021-11-12 23:08:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:35,784 INFO L225 Difference]: With dead ends: 181 [2021-11-12 23:08:35,784 INFO L226 Difference]: Without dead ends: 125 [2021-11-12 23:08:35,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:35,786 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 46 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 276.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:35,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 621 Invalid, 76 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 276.11ms Time] [2021-11-12 23:08:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-12 23:08:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-12 23:08:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-11-12 23:08:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2021-11-12 23:08:35,797 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 94 [2021-11-12 23:08:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:35,798 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2021-11-12 23:08:35,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:08:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2021-11-12 23:08:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:08:35,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:35,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:35,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 23:08:36,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:36,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1537767131, now seen corresponding path program 1 times [2021-11-12 23:08:36,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:36,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619900727] [2021-11-12 23:08:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:36,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:36,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:36,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:36,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:08:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:40,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:08:40,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:08:40,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:40,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619900727] [2021-11-12 23:08:40,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619900727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:40,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [667032864] [2021-11-12 23:08:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:40,937 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:40,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:40,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:08:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:08:45,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:08:45,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [667032864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:45,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71087695] [2021-11-12 23:08:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:45,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:45,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:45,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:08:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:08:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:47,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-12 23:08:47,602 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-12 23:08:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:08:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:08:48,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:49,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-12 23:08:49,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-12 23:08:49,898 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 23 treesize of output 21 [2021-11-12 23:08:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:08:50,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71087695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:50,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:08:50,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 11, 9] total 25 [2021-11-12 23:08:50,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309688368] [2021-11-12 23:08:50,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:08:50,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:08:50,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:08:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:08:50,305 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 7 states have call successors, (31), 3 states have call predecessors, (31), 8 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:08:52,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:54,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:56,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:58,615 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-11-12 23:08:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:08:58,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 7 states have call successors, (31), 3 states have call predecessors, (31), 8 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 109 [2021-11-12 23:08:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:58,617 INFO L225 Difference]: With dead ends: 168 [2021-11-12 23:08:58,618 INFO L226 Difference]: Without dead ends: 134 [2021-11-12 23:08:58,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 23:08:58,620 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 47 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7301.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.06ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 7479.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:58,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1751 Invalid, 389 Unknown, 0 Unchecked, 9.06ms Time], IncrementalHoareTripleChecker [18 Valid, 252 Invalid, 3 Unknown, 116 Unchecked, 7479.05ms Time] [2021-11-12 23:08:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-12 23:08:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-12 23:08:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-12 23:08:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-11-12 23:08:58,633 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 109 [2021-11-12 23:08:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:58,634 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-11-12 23:08:58,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 7 states have call successors, (31), 3 states have call predecessors, (31), 8 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:08:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-11-12 23:08:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:08:58,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:58,637 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:58,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:58,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 23:08:59,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-12 23:08:59,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:59,260 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash 92818734, now seen corresponding path program 1 times [2021-11-12 23:08:59,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:59,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864074698] [2021-11-12 23:08:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:59,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:59,264 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:59,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:09:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:09:04,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:09:05,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:05,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864074698] [2021-11-12 23:09:05,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864074698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:05,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740989134] [2021-11-12 23:09:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:05,183 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:05,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:05,199 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:05,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:09:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:09:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:09:09,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:09:10,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740989134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:10,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137125660] [2021-11-12 23:09:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:10,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:09:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:09:10,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:09:10,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 23:09:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:09:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:09:12,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:09:13,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137125660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:13,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:09:13,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-12 23:09:13,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451942059] [2021-11-12 23:09:13,459 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:09:13,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:09:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:09:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:09:13,462 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:15,974 INFO L93 Difference]: Finished difference Result 174 states and 211 transitions. [2021-11-12 23:09:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:09:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 116 [2021-11-12 23:09:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:15,978 INFO L225 Difference]: With dead ends: 174 [2021-11-12 23:09:15,978 INFO L226 Difference]: Without dead ends: 142 [2021-11-12 23:09:15,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:09:15,980 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 59 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 506.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.00ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 584.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:15,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1374 Invalid, 170 Unknown, 0 Unchecked, 5.00ms Time], IncrementalHoareTripleChecker [53 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 584.65ms Time] [2021-11-12 23:09:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-12 23:09:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-12 23:09:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-11-12 23:09:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2021-11-12 23:09:15,993 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 116 [2021-11-12 23:09:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:15,994 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2021-11-12 23:09:15,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 2 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:09:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2021-11-12 23:09:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:09:15,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:15,997 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:16,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:16,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:09:16,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:16,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:16,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash 706804910, now seen corresponding path program 2 times [2021-11-12 23:09:16,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:16,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624449668] [2021-11-12 23:09:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:09:16,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:16,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:16,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0372ce7d-9ab4-43bf-92ac-cdb47fe999c6/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process