./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_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_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/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_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/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_4463084c-9b5b-4967-8537-f91098b82535/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 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:29:35,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:29:35,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:29:35,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:29:35,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:29:35,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:29:35,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:29:35,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:29:35,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:29:35,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:29:35,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:29:35,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:29:35,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:29:35,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:29:35,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:29:35,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:29:35,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:29:35,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:29:35,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:29:35,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:29:35,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:29:35,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:29:35,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:29:35,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:29:35,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:29:35,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:29:35,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:29:35,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:29:35,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:29:35,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:29:35,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:29:35,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:29:35,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:29:35,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:29:35,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:29:35,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:29:35,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:29:35,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:29:35,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:29:35,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:29:35,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:29:35,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:29:35,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:29:35,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:29:35,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:29:35,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:29:35,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:29:35,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:29:35,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:29:35,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:29:35,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:29:35,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:29:35,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:29:35,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:29:35,410 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:29:35,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:29:35,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:29:35,411 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:29:35,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:29:35,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:29:35,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:29:35,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:29:35,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:29:35,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:29:35,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:29:35,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:29:35,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:29:35,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:29:35,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:29:35,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:29:35,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:35,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:29:35,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:29:35,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:29:35,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:29:35,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:29:35,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:29:35,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:29:35,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:29:35,417 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_4463084c-9b5b-4967-8537-f91098b82535/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 [2021-11-13 01:29:35,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:29:35,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:29:35,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:29:35,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:29:35,707 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:29:35,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2021-11-13 01:29:35,794 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/7eed154f2/7773b731facf45388b9a64ecede63395/FLAGb91a4c59a [2021-11-13 01:29:36,694 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:29:36,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2021-11-13 01:29:36,744 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/7eed154f2/7773b731facf45388b9a64ecede63395/FLAGb91a4c59a [2021-11-13 01:29:37,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/7eed154f2/7773b731facf45388b9a64ecede63395 [2021-11-13 01:29:37,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:29:37,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:29:37,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:37,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:29:37,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:29:37,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:37" (1/1) ... [2021-11-13 01:29:37,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e8d9a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:37, skipping insertion in model container [2021-11-13 01:29:37,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:37" (1/1) ... [2021-11-13 01:29:37,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:29:37,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:37,645 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2021-11-13 01:29:37,654 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2021-11-13 01:29:37,684 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:37,694 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:38,842 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,843 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,844 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,845 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,846 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,896 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,900 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,902 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,926 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,928 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:38,936 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:39,481 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:39,483 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:39,484 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:39,486 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:39,488 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:39,489 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:39,490 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:39,490 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:39,491 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:39,492 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:39,742 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:40,125 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,128 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,168 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,173 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,181 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,204 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,206 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,207 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,207 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,208 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,209 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:40,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:40,318 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) [2021-11-13 01:29:40,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@99e8cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:40, skipping insertion in model container [2021-11-13 01:29:40,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:40,319 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:29:40,322 INFO L158 Benchmark]: Toolchain (without parser) took 3190.12ms. Allocated memory was 81.8MB in the beginning and 115.3MB in the end (delta: 33.6MB). Free memory was 49.9MB in the beginning and 66.8MB in the end (delta: -17.0MB). Peak memory consumption was 34.5MB. Max. memory is 16.1GB. [2021-11-13 01:29:40,322 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 57.4MB in the beginning and 57.4MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:29:40,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3185.88ms. Allocated memory was 81.8MB in the beginning and 115.3MB in the end (delta: 33.6MB). Free memory was 49.7MB in the beginning and 66.8MB in the end (delta: -17.2MB). Peak memory consumption was 34.5MB. Max. memory is 16.1GB. [2021-11-13 01:29:40,327 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 57.4MB in the beginning and 57.4MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3185.88ms. Allocated memory was 81.8MB in the beginning and 115.3MB in the end (delta: 33.6MB). Free memory was 49.7MB in the beginning and 66.8MB in the end (delta: -17.2MB). Peak memory consumption was 34.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7051]: 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_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/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_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/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_4463084c-9b5b-4967-8537-f91098b82535/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 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:29:42,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:29:42,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:29:42,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:29:42,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:29:42,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:29:42,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:29:42,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:29:42,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:29:42,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:29:42,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:29:42,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:29:42,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:29:42,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:29:42,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:29:42,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:29:42,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:29:42,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:29:42,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:29:42,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:29:42,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:29:42,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:29:42,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:29:42,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:29:42,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:29:42,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:29:42,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:29:42,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:29:42,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:29:42,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:29:42,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:29:42,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:29:42,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:29:42,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:29:42,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:29:42,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:29:42,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:29:42,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:29:42,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:29:42,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:29:42,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:29:42,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:29:42,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:29:42,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:29:42,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:29:42,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:29:42,958 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:29:42,959 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:29:42,959 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:29:42,959 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:29:42,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:29:42,960 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:29:42,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:29:42,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:29:42,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:29:42,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:29:42,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:29:42,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:29:42,962 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:29:42,962 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:29:42,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:29:42,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:29:42,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:29:42,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:29:42,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:29:42,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:29:42,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:42,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:29:42,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:29:42,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:29:42,965 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:29:42,965 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:42,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:29:42,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:29:42,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:29:42,966 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_4463084c-9b5b-4967-8537-f91098b82535/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 [2021-11-13 01:29:43,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:29:43,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:29:43,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:29:43,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:29:43,422 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:29:43,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2021-11-13 01:29:43,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/4829c93a1/e15730d9d35147f19695a7e22ae60f17/FLAGbc68fd6b2 [2021-11-13 01:29:44,470 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:29:44,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2021-11-13 01:29:44,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/4829c93a1/e15730d9d35147f19695a7e22ae60f17/FLAGbc68fd6b2 [2021-11-13 01:29:44,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/data/4829c93a1/e15730d9d35147f19695a7e22ae60f17 [2021-11-13 01:29:44,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:29:44,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:29:44,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:44,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:29:44,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:29:44,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:44" (1/1) ... [2021-11-13 01:29:44,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d6ad7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:44, skipping insertion in model container [2021-11-13 01:29:44,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:29:44" (1/1) ... [2021-11-13 01:29:44,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:29:45,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:45,439 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2021-11-13 01:29:45,448 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2021-11-13 01:29:45,486 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:45,495 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:46,848 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,850 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,851 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,852 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,853 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,882 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,884 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,887 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,890 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,894 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,896 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:46,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:47,516 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:47,517 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:47,518 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:47,519 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:47,520 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:47,521 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:47,522 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:47,522 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:47,523 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:47,524 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:47,802 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:48,206 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,207 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,229 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,230 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,236 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,236 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,250 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,251 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,252 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,252 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,253 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,253 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,254 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:48,347 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:29:48,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:29:48,447 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2021-11-13 01:29:48,448 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2021-11-13 01:29:48,449 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:48,450 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:48,507 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,508 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,508 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,509 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,509 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,515 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,515 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,516 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,517 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,518 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,518 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,519 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,519 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:48,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:48,550 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:48,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:48,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:48,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:48,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:48,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:48,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:48,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:48,574 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:48,698 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,699 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,706 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,707 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,710 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,710 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,717 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,718 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,719 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,719 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,720 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,720 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,721 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:48,762 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:29:48,775 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2021-11-13 01:29:48,776 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_4463084c-9b5b-4967-8537-f91098b82535/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2021-11-13 01:29:48,777 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:29:48,778 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:29:48,838 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,839 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,839 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,839 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,840 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,845 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,846 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,847 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,847 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,848 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,849 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,849 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,849 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:48,876 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:29:48,877 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:29:48,877 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:29:48,878 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:29:48,879 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:29:48,879 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:29:48,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:29:48,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:29:48,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:29:48,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:29:48,899 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:29:49,026 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,027 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,041 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,041 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,044 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,056 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,058 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,058 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,059 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,059 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,060 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:29:49,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:29:49,622 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:29:49,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49 WrapperNode [2021-11-13 01:29:49,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:29:49,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:29:49,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:29:49,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:29:49,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:29:49,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:29:49,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:29:49,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:29:49,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:49,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:50,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:50,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:50,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:29:50,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:29:50,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:29:50,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:29:50,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (1/1) ... [2021-11-13 01:29:50,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:29:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:29:50,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:29:50,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:29:50,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-13 01:29:50,165 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_done [2021-11-13 01:29:50,165 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_done [2021-11-13 01:29:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-13 01:29:50,166 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-13 01:29:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:29:50,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:29:50,166 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-13 01:29:50,167 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-13 01:29:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:29:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:29:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:29:50,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:29:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 01:29:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 01:29:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-13 01:29:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-13 01:29:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-13 01:29:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:29:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-13 01:29:50,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-13 01:29:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-13 01:29:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:29:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 01:29:50,169 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 01:29:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-13 01:29:50,170 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-13 01:29:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:29:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:29:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 01:29:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 01:29:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-13 01:29:50,171 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-13 01:29:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:29:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 01:29:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:29:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:29:50,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:29:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2021-11-13 01:29:50,172 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2021-11-13 01:29:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 01:29:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 01:29:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-13 01:29:50,172 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-13 01:29:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:29:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-13 01:29:50,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-13 01:29:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-13 01:29:50,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-13 01:30:03,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:30:03,794 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 01:30:03,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:30:03 BoogieIcfgContainer [2021-11-13 01:30:03,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:30:03,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:30:03,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:30:03,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:30:03,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:29:44" (1/3) ... [2021-11-13 01:30:03,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20846567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:30:03, skipping insertion in model container [2021-11-13 01:30:03,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:29:49" (2/3) ... [2021-11-13 01:30:03,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20846567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:30:03, skipping insertion in model container [2021-11-13 01:30:03,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:30:03" (3/3) ... [2021-11-13 01:30:03,806 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_done_harness.i [2021-11-13 01:30:03,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:30:03,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:30:03,869 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:30:03,877 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 [2021-11-13 01:30:03,877 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:30:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 97 states have internal predecessors, (119), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-13 01:30:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 01:30:03,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:03,919 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:03,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1112082406, now seen corresponding path program 1 times [2021-11-13 01:30:03,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:03,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620336633] [2021-11-13 01:30:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:03,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:03,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:03,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:30:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:30:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 01:30:09,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-13 01:30:09,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:09,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620336633] [2021-11-13 01:30:09,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620336633] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:09,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:09,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-13 01:30:09,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026779993] [2021-11-13 01:30:09,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:09,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:30:09,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:30:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:30:09,675 INFO L87 Difference]: Start difference. First operand has 153 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 97 states have internal predecessors, (119), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:09,750 INFO L93 Difference]: Finished difference Result 298 states and 410 transitions. [2021-11-13 01:30:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:30:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 136 [2021-11-13 01:30:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:09,768 INFO L225 Difference]: With dead ends: 298 [2021-11-13 01:30:09,768 INFO L226 Difference]: Without dead ends: 147 [2021-11-13 01:30:09,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:30:09,778 INFO L933 BasicCegarLoop]: 197 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, 197 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:09,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 6.61ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:30:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-13 01:30:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-13 01:30:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 92 states have internal predecessors, (112), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 01:30:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2021-11-13 01:30:09,877 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 136 [2021-11-13 01:30:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:09,878 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2021-11-13 01:30:09,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2021-11-13 01:30:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 01:30:09,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:09,888 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:09,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 01:30:10,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:10,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash -978654614, now seen corresponding path program 1 times [2021-11-13 01:30:10,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:10,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757420809] [2021-11-13 01:30:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:10,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:10,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:10,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:10,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:30:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:30:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-13 01:30:15,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-13 01:30:15,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:15,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757420809] [2021-11-13 01:30:15,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757420809] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:15,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:15,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 01:30:15,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179599603] [2021-11-13 01:30:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:15,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:30:15,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:30:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:30:15,657 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:15,798 INFO L93 Difference]: Finished difference Result 286 states and 373 transitions. [2021-11-13 01:30:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 136 [2021-11-13 01:30:15,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:15,808 INFO L225 Difference]: With dead ends: 286 [2021-11-13 01:30:15,808 INFO L226 Difference]: Without dead ends: 151 [2021-11-13 01:30:15,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:30:15,815 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 2 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.43ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:15,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 752 Invalid, 11 Unknown, 0 Unchecked, 13.49ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 57.43ms Time] [2021-11-13 01:30:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-13 01:30:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-13 01:30:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 95 states have internal predecessors, (115), 40 states have call successors, (40), 15 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2021-11-13 01:30:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2021-11-13 01:30:15,860 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 136 [2021-11-13 01:30:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:15,866 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2021-11-13 01:30:15,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 01:30:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2021-11-13 01:30:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 01:30:15,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:15,878 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:15,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 01:30:16,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:16,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1090143658, now seen corresponding path program 1 times [2021-11-13 01:30:16,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:16,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749961298] [2021-11-13 01:30:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:16,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:16,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:16,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:16,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:30:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:30:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 01:30:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-13 01:30:21,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:21,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749961298] [2021-11-13 01:30:21,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749961298] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:21,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:21,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-13 01:30:21,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095063928] [2021-11-13 01:30:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:21,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:30:21,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:30:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:30:21,238 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 01:30:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:21,562 INFO L93 Difference]: Finished difference Result 292 states and 377 transitions. [2021-11-13 01:30:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:30:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 148 [2021-11-13 01:30:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:21,567 INFO L225 Difference]: With dead ends: 292 [2021-11-13 01:30:21,567 INFO L226 Difference]: Without dead ends: 153 [2021-11-13 01:30:21,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:30:21,569 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 259.66ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:21,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 864 Invalid, 85 Unknown, 0 Unchecked, 8.45ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 259.66ms Time] [2021-11-13 01:30:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-13 01:30:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-13 01:30:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 97 states have internal predecessors, (116), 40 states have call successors, (40), 15 states have call predecessors, (40), 17 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2021-11-13 01:30:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2021-11-13 01:30:21,588 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 148 [2021-11-13 01:30:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:21,589 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2021-11-13 01:30:21,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 01:30:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2021-11-13 01:30:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-13 01:30:21,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:21,593 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:21,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:21,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:21,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1917407753, now seen corresponding path program 1 times [2021-11-13 01:30:21,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:21,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201124346] [2021-11-13 01:30:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:21,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:21,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:21,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:30:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 01:30:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:26,326 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 16 treesize of output 12 [2021-11-13 01:30:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:27,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:28,342 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 30 treesize of output 26 [2021-11-13 01:30:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 01:30:28,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:28,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201124346] [2021-11-13 01:30:28,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201124346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:28,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:28,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 15 [2021-11-13 01:30:28,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282591691] [2021-11-13 01:30:28,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:28,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 01:30:28,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:28,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 01:30:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:30:28,728 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-13 01:30:30,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:32,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:34,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:36,371 INFO L93 Difference]: Finished difference Result 303 states and 390 transitions. [2021-11-13 01:30:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 01:30:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 153 [2021-11-13 01:30:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:36,376 INFO L225 Difference]: With dead ends: 303 [2021-11-13 01:30:36,376 INFO L226 Difference]: Without dead ends: 170 [2021-11-13 01:30:36,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:30:36,378 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 28 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7363.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.94ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 7518.21ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:36,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1552 Invalid, 127 Unknown, 0 Unchecked, 9.94ms Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 3 Unknown, 40 Unchecked, 7518.21ms Time] [2021-11-13 01:30:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-13 01:30:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-11-13 01:30:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 108 states have internal predecessors, (128), 40 states have call successors, (40), 16 states have call predecessors, (40), 19 states have return successors, (44), 40 states have call predecessors, (44), 39 states have call successors, (44) [2021-11-13 01:30:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2021-11-13 01:30:36,394 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 153 [2021-11-13 01:30:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:36,394 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2021-11-13 01:30:36,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-13 01:30:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2021-11-13 01:30:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-13 01:30:36,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:36,397 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:36,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-13 01:30:36,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:36,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash -40924935, now seen corresponding path program 1 times [2021-11-13 01:30:36,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:36,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502346901] [2021-11-13 01:30:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:36,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:36,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:36,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:36,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:30:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:30:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:41,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 01:30:41,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:41,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502346901] [2021-11-13 01:30:41,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502346901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:41,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 01:30:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565692528] [2021-11-13 01:30:41,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:30:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:30:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:30:41,965 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-13 01:30:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:42,098 INFO L93 Difference]: Finished difference Result 308 states and 398 transitions. [2021-11-13 01:30:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:30:42,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 153 [2021-11-13 01:30:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:42,103 INFO L225 Difference]: With dead ends: 308 [2021-11-13 01:30:42,103 INFO L226 Difference]: Without dead ends: 170 [2021-11-13 01:30:42,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:30:42,105 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 26 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.64ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:42,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 519 Invalid, 22 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 114.64ms Time] [2021-11-13 01:30:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-13 01:30:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2021-11-13 01:30:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 109 states have internal predecessors, (128), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2021-11-13 01:30:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2021-11-13 01:30:42,123 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 153 [2021-11-13 01:30:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:42,123 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2021-11-13 01:30:42,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-13 01:30:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2021-11-13 01:30:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-13 01:30:42,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:42,127 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:42,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:42,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:42,328 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash 253240325, now seen corresponding path program 1 times [2021-11-13 01:30:42,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:42,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841853163] [2021-11-13 01:30:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:42,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:42,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:30:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 01:30:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:46,758 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 16 treesize of output 12 [2021-11-13 01:30:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:30:47,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:48,900 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 30 treesize of output 26 [2021-11-13 01:30:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 01:30:49,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:49,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841853163] [2021-11-13 01:30:49,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841853163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:49,223 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:49,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 17 [2021-11-13 01:30:49,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713613662] [2021-11-13 01:30:49,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:49,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 01:30:49,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 01:30:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:30:49,226 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 17 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 6 states have call successors, (40), 3 states have call predecessors, (40), 7 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) [2021-11-13 01:30:51,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:53,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:55,529 INFO L93 Difference]: Finished difference Result 329 states and 420 transitions. [2021-11-13 01:30:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:30:55,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 6 states have call successors, (40), 3 states have call predecessors, (40), 7 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) Word has length 159 [2021-11-13 01:30:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:55,535 INFO L225 Difference]: With dead ends: 329 [2021-11-13 01:30:55,535 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 01:30:55,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:30:55,537 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 43 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5969.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.51ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 6151.28ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:55,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1899 Invalid, 289 Unknown, 0 Unchecked, 8.51ms Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 2 Unknown, 127 Unchecked, 6151.28ms Time] [2021-11-13 01:30:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 01:30:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2021-11-13 01:30:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.2) internal successors, (132), 113 states have internal predecessors, (132), 42 states have call successors, (42), 17 states have call predecessors, (42), 20 states have return successors, (48), 42 states have call predecessors, (48), 41 states have call successors, (48) [2021-11-13 01:30:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2021-11-13 01:30:55,556 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 159 [2021-11-13 01:30:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:55,557 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2021-11-13 01:30:55,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 6 states have call successors, (40), 3 states have call predecessors, (40), 7 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) [2021-11-13 01:30:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2021-11-13 01:30:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 01:30:55,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:55,561 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:55,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:55,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:55,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:30:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1005891537, now seen corresponding path program 1 times [2021-11-13 01:30:55,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:55,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284577538] [2021-11-13 01:30:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:55,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:55,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:55,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:55,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:30:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:31:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 01:31:00,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 01:31:00,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284577538] [2021-11-13 01:31:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284577538] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:00,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:00,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-13 01:31:00,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259923083] [2021-11-13 01:31:00,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:00,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:31:00,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:31:00,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:00,940 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-13 01:31:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:01,325 INFO L93 Difference]: Finished difference Result 312 states and 401 transitions. [2021-11-13 01:31:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:01,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 164 [2021-11-13 01:31:01,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:01,329 INFO L225 Difference]: With dead ends: 312 [2021-11-13 01:31:01,329 INFO L226 Difference]: Without dead ends: 175 [2021-11-13 01:31:01,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:01,331 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 37 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 291.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:01,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 643 Invalid, 67 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 348.41ms Time] [2021-11-13 01:31:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-13 01:31:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-13 01:31:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 115 states have internal predecessors, (133), 42 states have call successors, (42), 17 states have call predecessors, (42), 21 states have return successors, (50), 42 states have call predecessors, (50), 41 states have call successors, (50) [2021-11-13 01:31:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 225 transitions. [2021-11-13 01:31:01,371 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 225 transitions. Word has length 164 [2021-11-13 01:31:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:01,373 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 225 transitions. [2021-11-13 01:31:01,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-13 01:31:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 225 transitions. [2021-11-13 01:31:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 01:31:01,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:01,377 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:01,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:01,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:01,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:01,598 INFO L85 PathProgramCache]: Analyzing trace with hash -648979799, now seen corresponding path program 1 times [2021-11-13 01:31:01,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:01,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801331582] [2021-11-13 01:31:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:01,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:01,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:01,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:01,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:31:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:31:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:06,161 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 16 treesize of output 12 [2021-11-13 01:31:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:31:06,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 01:31:07,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:07,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801331582] [2021-11-13 01:31:07,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801331582] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:07,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:07,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-11-13 01:31:07,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343411102] [2021-11-13 01:31:07,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:07,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:07,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:31:07,727 INFO L87 Difference]: Start difference. First operand 175 states and 225 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 01:31:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:07,863 INFO L93 Difference]: Finished difference Result 323 states and 412 transitions. [2021-11-13 01:31:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:31:07,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 165 [2021-11-13 01:31:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:07,868 INFO L225 Difference]: With dead ends: 323 [2021-11-13 01:31:07,869 INFO L226 Difference]: Without dead ends: 182 [2021-11-13 01:31:07,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:31:07,871 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 9 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 56.52ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:07,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 865 Invalid, 80 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 74 Unchecked, 56.52ms Time] [2021-11-13 01:31:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-13 01:31:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-13 01:31:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 120 states have internal predecessors, (140), 42 states have call successors, (42), 19 states have call predecessors, (42), 22 states have return successors, (50), 42 states have call predecessors, (50), 41 states have call successors, (50) [2021-11-13 01:31:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2021-11-13 01:31:07,888 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 165 [2021-11-13 01:31:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 232 transitions. [2021-11-13 01:31:07,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 01:31:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 232 transitions. [2021-11-13 01:31:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 01:31:07,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:07,893 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:07,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-13 01:31:08,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:08,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:08,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1153365888, now seen corresponding path program 1 times [2021-11-13 01:31:08,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:08,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345936519] [2021-11-13 01:31:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:08,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:08,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:08,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:31:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 01:31:12,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-13 01:31:13,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:13,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345936519] [2021-11-13 01:31:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345936519] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:13,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:13,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-13 01:31:13,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442045014] [2021-11-13 01:31:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:13,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:13,243 INFO L87 Difference]: Start difference. First operand 182 states and 232 transitions. Second operand has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:31:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:13,538 INFO L93 Difference]: Finished difference Result 323 states and 414 transitions. [2021-11-13 01:31:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:31:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 174 [2021-11-13 01:31:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:13,542 INFO L225 Difference]: With dead ends: 323 [2021-11-13 01:31:13,542 INFO L226 Difference]: Without dead ends: 184 [2021-11-13 01:31:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:31:13,544 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 259.66ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:13,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 859 Invalid, 90 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 259.66ms Time] [2021-11-13 01:31:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-13 01:31:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-13 01:31:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 42 states have call successors, (42), 19 states have call predecessors, (42), 23 states have return successors, (53), 42 states have call predecessors, (53), 41 states have call successors, (53) [2021-11-13 01:31:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 236 transitions. [2021-11-13 01:31:13,562 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 236 transitions. Word has length 174 [2021-11-13 01:31:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 236 transitions. [2021-11-13 01:31:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:31:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 236 transitions. [2021-11-13 01:31:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 01:31:13,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:13,566 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:13,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:13,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:13,793 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1809976868, now seen corresponding path program 1 times [2021-11-13 01:31:13,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:13,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709490202] [2021-11-13 01:31:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:13,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:13,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:13,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:13,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:31:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:18,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1941 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:31:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 01:31:18,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-13 01:31:19,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:19,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709490202] [2021-11-13 01:31:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709490202] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:19,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:19,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 01:31:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250998242] [2021-11-13 01:31:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:19,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:31:19,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:19,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:31:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:31:19,134 INFO L87 Difference]: Start difference. First operand 184 states and 236 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 01:31:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:19,204 INFO L93 Difference]: Finished difference Result 332 states and 434 transitions. [2021-11-13 01:31:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 176 [2021-11-13 01:31:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:19,222 INFO L225 Difference]: With dead ends: 332 [2021-11-13 01:31:19,222 INFO L226 Difference]: Without dead ends: 191 [2021-11-13 01:31:19,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:31:19,224 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.37ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:19,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 756 Invalid, 13 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 44.37ms Time] [2021-11-13 01:31:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-13 01:31:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-13 01:31:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 128 states have internal predecessors, (146), 42 states have call successors, (42), 19 states have call predecessors, (42), 25 states have return successors, (56), 43 states have call predecessors, (56), 41 states have call successors, (56) [2021-11-13 01:31:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 244 transitions. [2021-11-13 01:31:19,245 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 244 transitions. Word has length 176 [2021-11-13 01:31:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:19,245 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 244 transitions. [2021-11-13 01:31:19,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 01:31:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 244 transitions. [2021-11-13 01:31:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-13 01:31:19,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:19,248 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:19,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:19,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:19,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2071333262, now seen corresponding path program 1 times [2021-11-13 01:31:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:19,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891565688] [2021-11-13 01:31:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:19,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:19,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:19,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:31:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:31:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 01:31:25,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-13 01:31:26,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:26,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891565688] [2021-11-13 01:31:26,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891565688] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:26,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:26,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-13 01:31:26,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065472220] [2021-11-13 01:31:26,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:26,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:26,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:31:26,830 INFO L87 Difference]: Start difference. First operand 191 states and 244 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-13 01:31:29,047 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 [] [2021-11-13 01:31:31,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:32,039 INFO L93 Difference]: Finished difference Result 339 states and 442 transitions. [2021-11-13 01:31:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:31:32,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 182 [2021-11-13 01:31:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:32,047 INFO L225 Difference]: With dead ends: 339 [2021-11-13 01:31:32,047 INFO L226 Difference]: Without dead ends: 189 [2021-11-13 01:31:32,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:31:32,049 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4715.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 4837.79ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:32,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1049 Invalid, 117 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 73 Unchecked, 4837.79ms Time] [2021-11-13 01:31:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-13 01:31:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2021-11-13 01:31:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 41 states have call successors, (41), 19 states have call predecessors, (41), 24 states have return successors, (52), 42 states have call predecessors, (52), 40 states have call successors, (52) [2021-11-13 01:31:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2021-11-13 01:31:32,064 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 182 [2021-11-13 01:31:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:32,065 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2021-11-13 01:31:32,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-13 01:31:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2021-11-13 01:31:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 01:31:32,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:32,067 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:32,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:32,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:32,277 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1352140560, now seen corresponding path program 1 times [2021-11-13 01:31:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:32,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382280696] [2021-11-13 01:31:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:32,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:32,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:32,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:32,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:31:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:36,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:36,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-13 01:31:37,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-13 01:31:37,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:37,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382280696] [2021-11-13 01:31:37,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382280696] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:37,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:37,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-13 01:31:37,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776888659] [2021-11-13 01:31:37,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:37,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:37,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:31:37,733 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 01:31:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:38,051 INFO L93 Difference]: Finished difference Result 290 states and 373 transitions. [2021-11-13 01:31:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:31:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 187 [2021-11-13 01:31:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:38,056 INFO L225 Difference]: With dead ends: 290 [2021-11-13 01:31:38,057 INFO L226 Difference]: Without dead ends: 184 [2021-11-13 01:31:38,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:31:38,059 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 246.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.14ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:38,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 864 Invalid, 85 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 278.14ms Time] [2021-11-13 01:31:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-13 01:31:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-11-13 01:31:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 119 states have internal predecessors, (137), 41 states have call successors, (41), 19 states have call predecessors, (41), 22 states have return successors, (50), 41 states have call predecessors, (50), 40 states have call successors, (50) [2021-11-13 01:31:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 228 transitions. [2021-11-13 01:31:38,086 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 228 transitions. Word has length 187 [2021-11-13 01:31:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:38,086 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 228 transitions. [2021-11-13 01:31:38,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 01:31:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 228 transitions. [2021-11-13 01:31:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 01:31:38,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:38,091 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:38,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:38,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:38,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1832527067, now seen corresponding path program 1 times [2021-11-13 01:31:38,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:38,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426272627] [2021-11-13 01:31:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:38,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:38,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:38,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:38,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:31:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:31:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-13 01:31:43,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-11-13 01:31:43,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:43,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426272627] [2021-11-13 01:31:43,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426272627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:43,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:43,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 01:31:43,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739042244] [2021-11-13 01:31:43,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:43,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:43,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:31:43,902 INFO L87 Difference]: Start difference. First operand 180 states and 228 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 01:31:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:44,712 INFO L93 Difference]: Finished difference Result 273 states and 348 transitions. [2021-11-13 01:31:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:31:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 4 states have call successors, (27) Word has length 192 [2021-11-13 01:31:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:44,716 INFO L225 Difference]: With dead ends: 273 [2021-11-13 01:31:44,716 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 01:31:44,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:31:44,718 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 53 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 654.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 735.90ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:44,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1061 Invalid, 161 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 735.90ms Time] [2021-11-13 01:31:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 01:31:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-13 01:31:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 117 states have internal predecessors, (134), 41 states have call successors, (41), 19 states have call predecessors, (41), 21 states have return successors, (48), 41 states have call predecessors, (48), 40 states have call successors, (48) [2021-11-13 01:31:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 223 transitions. [2021-11-13 01:31:44,736 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 223 transitions. Word has length 192 [2021-11-13 01:31:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:44,737 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 223 transitions. [2021-11-13 01:31:44,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 01:31:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 223 transitions. [2021-11-13 01:31:44,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 01:31:44,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:44,739 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:44,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:44,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:44,966 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1652376459, now seen corresponding path program 1 times [2021-11-13 01:31:44,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:44,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442699583] [2021-11-13 01:31:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:44,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:44,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:44,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:31:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-13 01:31:49,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 01:31:50,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:50,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442699583] [2021-11-13 01:31:50,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442699583] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:31:50,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:31:50,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-13 01:31:50,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477551835] [2021-11-13 01:31:50,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:50,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:31:50,359 INFO L87 Difference]: Start difference. First operand 178 states and 223 transitions. Second operand has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-13 01:31:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:50,669 INFO L93 Difference]: Finished difference Result 269 states and 340 transitions. [2021-11-13 01:31:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:31:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 193 [2021-11-13 01:31:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:50,672 INFO L225 Difference]: With dead ends: 269 [2021-11-13 01:31:50,672 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 01:31:50,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:31:50,673 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 2 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 248.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 269.32ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:50,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 846 Invalid, 88 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 269.32ms Time] [2021-11-13 01:31:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 01:31:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-13 01:31:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 117 states have internal predecessors, (134), 41 states have call successors, (41), 19 states have call predecessors, (41), 21 states have return successors, (47), 41 states have call predecessors, (47), 40 states have call successors, (47) [2021-11-13 01:31:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2021-11-13 01:31:50,685 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 193 [2021-11-13 01:31:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2021-11-13 01:31:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-13 01:31:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2021-11-13 01:31:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 01:31:50,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:50,688 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:50,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:50,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:50,913 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1289696526, now seen corresponding path program 1 times [2021-11-13 01:31:50,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:50,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047339964] [2021-11-13 01:31:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:50,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:50,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:50,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:50,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:31:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:31:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:57,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:57,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 9 [2021-11-13 01:31:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 01:31:57,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:59,417 INFO L354 Elim1Store]: treesize reduction 221, result has 42.6 percent of original size [2021-11-13 01:31:59,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 183 [2021-11-13 01:33:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-13 01:33:18,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:18,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047339964] [2021-11-13 01:33:18,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047339964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:18,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:18,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 7] imperfect sequences [] total 15 [2021-11-13 01:33:18,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517607651] [2021-11-13 01:33:18,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:18,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 01:33:18,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:18,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 01:33:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-13 01:33:18,903 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand has 15 states, 14 states have (on average 6.714285714285714) internal successors, (94), 13 states have internal predecessors, (94), 7 states have call successors, (37), 4 states have call predecessors, (37), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-11-13 01:33:21,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:23,143 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:25,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:30,314 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2021-11-13 01:33:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:33:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.714285714285714) internal successors, (94), 13 states have internal predecessors, (94), 7 states have call successors, (37), 4 states have call predecessors, (37), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 215 [2021-11-13 01:33:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:30,320 INFO L225 Difference]: With dead ends: 296 [2021-11-13 01:33:30,320 INFO L226 Difference]: Without dead ends: 215 [2021-11-13 01:33:30,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 415 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:33:30,322 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 89 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 44 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9947.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.34ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 10422.93ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:30,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2046 Invalid, 608 Unknown, 0 Unchecked, 9.34ms Time], IncrementalHoareTripleChecker [44 Valid, 497 Invalid, 3 Unknown, 64 Unchecked, 10422.93ms Time] [2021-11-13 01:33:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-13 01:33:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 205. [2021-11-13 01:33:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 135 states have internal predecessors, (156), 47 states have call successors, (47), 21 states have call predecessors, (47), 24 states have return successors, (61), 48 states have call predecessors, (61), 46 states have call successors, (61) [2021-11-13 01:33:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 264 transitions. [2021-11-13 01:33:30,343 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 264 transitions. Word has length 215 [2021-11-13 01:33:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:30,345 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 264 transitions. [2021-11-13 01:33:30,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.714285714285714) internal successors, (94), 13 states have internal predecessors, (94), 7 states have call successors, (37), 4 states have call predecessors, (37), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-11-13 01:33:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 264 transitions. [2021-11-13 01:33:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 01:33:30,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:30,348 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:30,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-13 01:33:30,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:30,557 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1287849484, now seen corresponding path program 1 times [2021-11-13 01:33:30,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:30,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844836195] [2021-11-13 01:33:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:30,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:30,563 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:30,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:33:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 01:33:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:37,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:33:37,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 9 [2021-11-13 01:33:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 01:33:37,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:40,236 INFO L354 Elim1Store]: treesize reduction 221, result has 42.6 percent of original size [2021-11-13 01:33:40,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 183 [2021-11-13 01:35:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-13 01:35:11,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:11,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844836195] [2021-11-13 01:35:11,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844836195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:11,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:11,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 9] imperfect sequences [] total 19 [2021-11-13 01:35:11,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043060414] [2021-11-13 01:35:11,278 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:11,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 01:35:11,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 01:35:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:35:11,280 INFO L87 Difference]: Start difference. First operand 205 states and 264 transitions. Second operand has 19 states, 18 states have (on average 5.333333333333333) internal successors, (96), 15 states have internal predecessors, (96), 7 states have call successors, (38), 5 states have call predecessors, (38), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-11-13 01:35:13,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:15,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:21,550 INFO L93 Difference]: Finished difference Result 221 states and 282 transitions. [2021-11-13 01:35:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 01:35:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.333333333333333) internal successors, (96), 15 states have internal predecessors, (96), 7 states have call successors, (38), 5 states have call predecessors, (38), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 215 [2021-11-13 01:35:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:21,553 INFO L225 Difference]: With dead ends: 221 [2021-11-13 01:35:21,553 INFO L226 Difference]: Without dead ends: 219 [2021-11-13 01:35:21,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 413 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-11-13 01:35:21,555 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 103 mSDsluCounter, 2207 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8525.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2393 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.91ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 8998.83ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:21,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2393 Invalid, 733 Unknown, 0 Unchecked, 9.91ms Time], IncrementalHoareTripleChecker [42 Valid, 627 Invalid, 2 Unknown, 62 Unchecked, 8998.83ms Time] [2021-11-13 01:35:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-13 01:35:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 210. [2021-11-13 01:35:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 139 states have internal predecessors, (159), 48 states have call successors, (48), 22 states have call predecessors, (48), 25 states have return successors, (62), 48 states have call predecessors, (62), 47 states have call successors, (62) [2021-11-13 01:35:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 269 transitions. [2021-11-13 01:35:21,573 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 269 transitions. Word has length 215 [2021-11-13 01:35:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 269 transitions. [2021-11-13 01:35:21,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.333333333333333) internal successors, (96), 15 states have internal predecessors, (96), 7 states have call successors, (38), 5 states have call predecessors, (38), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-11-13 01:35:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 269 transitions. [2021-11-13 01:35:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-13 01:35:21,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:21,577 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:21,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:21,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:21,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1304674839, now seen corresponding path program 1 times [2021-11-13 01:35:21,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:21,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164752537] [2021-11-13 01:35:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:21,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:21,813 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:21,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:35:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:35:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:28,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:28,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 35 [2021-11-13 01:35:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-13 01:35:28,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:29,348 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-13 01:35:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 1 [2021-11-13 01:35:30,385 INFO L354 Elim1Store]: treesize reduction 350, result has 9.1 percent of original size [2021-11-13 01:35:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 55 [2021-11-13 01:35:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-13 01:35:32,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:32,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164752537] [2021-11-13 01:35:32,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164752537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:32,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 8] imperfect sequences [] total 17 [2021-11-13 01:35:32,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101011212] [2021-11-13 01:35:32,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 01:35:32,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 01:35:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:35:32,118 INFO L87 Difference]: Start difference. First operand 210 states and 269 transitions. Second operand has 17 states, 16 states have (on average 6.4375) internal successors, (103), 14 states have internal predecessors, (103), 8 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (35), 7 states have call predecessors, (35), 8 states have call successors, (35) [2021-11-13 01:35:34,339 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:36,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:38,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:40,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:42,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:51,700 INFO L93 Difference]: Finished difference Result 363 states and 479 transitions. [2021-11-13 01:35:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 01:35:51,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.4375) internal successors, (103), 14 states have internal predecessors, (103), 8 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (35), 7 states have call predecessors, (35), 8 states have call successors, (35) Word has length 218 [2021-11-13 01:35:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:51,705 INFO L225 Difference]: With dead ends: 363 [2021-11-13 01:35:51,706 INFO L226 Difference]: Without dead ends: 268 [2021-11-13 01:35:51,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2021-11-13 01:35:51,708 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 155 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 57 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16323.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.81ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 17104.74ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:51,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 2074 Invalid, 864 Unknown, 0 Unchecked, 11.81ms Time], IncrementalHoareTripleChecker [57 Valid, 728 Invalid, 5 Unknown, 74 Unchecked, 17104.74ms Time] [2021-11-13 01:35:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-13 01:35:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 252. [2021-11-13 01:35:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 169 states have internal predecessors, (199), 56 states have call successors, (56), 25 states have call predecessors, (56), 29 states have return successors, (80), 57 states have call predecessors, (80), 55 states have call successors, (80) [2021-11-13 01:35:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 335 transitions. [2021-11-13 01:35:51,730 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 335 transitions. Word has length 218 [2021-11-13 01:35:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:51,731 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 335 transitions. [2021-11-13 01:35:51,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.4375) internal successors, (103), 14 states have internal predecessors, (103), 8 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (35), 7 states have call predecessors, (35), 8 states have call successors, (35) [2021-11-13 01:35:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 335 transitions. [2021-11-13 01:35:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-13 01:35:51,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:51,734 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:51,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:51,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:51,958 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:51,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1562840277, now seen corresponding path program 1 times [2021-11-13 01:35:51,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:51,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414414167] [2021-11-13 01:35:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:51,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:51,964 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:51,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:35:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:35:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:58,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:35:58,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 35 [2021-11-13 01:35:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 01:35:59,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:00,224 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-13 01:36:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 1 [2021-11-13 01:36:01,773 INFO L354 Elim1Store]: treesize reduction 323, result has 16.1 percent of original size [2021-11-13 01:36:01,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 82 [2021-11-13 01:36:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-13 01:36:05,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:05,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414414167] [2021-11-13 01:36:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414414167] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:05,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:36:05,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2021-11-13 01:36:05,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635424556] [2021-11-13 01:36:05,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:05,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:36:05,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:36:05,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:36:05,065 INFO L87 Difference]: Start difference. First operand 252 states and 335 transitions. Second operand has 10 states, 9 states have (on average 8.88888888888889) internal successors, (80), 10 states have internal predecessors, (80), 5 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:36:07,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:09,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:11,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:18,619 INFO L93 Difference]: Finished difference Result 342 states and 444 transitions. [2021-11-13 01:36:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:36:18,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.88888888888889) internal successors, (80), 10 states have internal predecessors, (80), 5 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 218 [2021-11-13 01:36:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:18,625 INFO L225 Difference]: With dead ends: 342 [2021-11-13 01:36:18,625 INFO L226 Difference]: Without dead ends: 231 [2021-11-13 01:36:18,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:36:18,627 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 40 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10688.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.70ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11192.71ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:18,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1045 Invalid, 345 Unknown, 0 Unchecked, 5.70ms Time], IncrementalHoareTripleChecker [4 Valid, 338 Invalid, 3 Unknown, 0 Unchecked, 11192.71ms Time] [2021-11-13 01:36:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-13 01:36:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2021-11-13 01:36:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 148 states have (on average 1.1891891891891893) internal successors, (176), 151 states have internal predecessors, (176), 49 states have call successors, (49), 23 states have call predecessors, (49), 27 states have return successors, (68), 50 states have call predecessors, (68), 48 states have call successors, (68) [2021-11-13 01:36:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 293 transitions. [2021-11-13 01:36:18,646 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 293 transitions. Word has length 218 [2021-11-13 01:36:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:18,647 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 293 transitions. [2021-11-13 01:36:18,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.88888888888889) internal successors, (80), 10 states have internal predecessors, (80), 5 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-13 01:36:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 293 transitions. [2021-11-13 01:36:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 01:36:18,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:18,651 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:18,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:18,877 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash -281722156, now seen corresponding path program 1 times [2021-11-13 01:36:18,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:18,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723993545] [2021-11-13 01:36:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:18,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:18,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:18,888 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:18,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:36:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 01:36:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:27,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:36:27,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 9 [2021-11-13 01:36:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-11-13 01:36:27,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:30,529 INFO L354 Elim1Store]: treesize reduction 221, result has 42.6 percent of original size [2021-11-13 01:36:30,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 183 [2021-11-13 01:36:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-13 01:36:31,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:31,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723993545] [2021-11-13 01:36:31,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723993545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:31,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:31,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 10] imperfect sequences [] total 21 [2021-11-13 01:36:31,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182958829] [2021-11-13 01:36:31,986 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:31,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 01:36:31,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 01:36:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:36:31,988 INFO L87 Difference]: Start difference. First operand 225 states and 293 transitions. Second operand has 21 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 7 states have call successors, (38), 5 states have call predecessors, (38), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-11-13 01:36:34,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:36,252 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:38,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:47,241 INFO L93 Difference]: Finished difference Result 325 states and 412 transitions. [2021-11-13 01:36:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 01:36:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 7 states have call successors, (38), 5 states have call predecessors, (38), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 219 [2021-11-13 01:36:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:47,245 INFO L225 Difference]: With dead ends: 325 [2021-11-13 01:36:47,245 INFO L226 Difference]: Without dead ends: 242 [2021-11-13 01:36:47,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 419 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-11-13 01:36:47,247 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 120 mSDsluCounter, 2782 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12795.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.01ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 13541.75ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:47,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 2964 Invalid, 1059 Unknown, 0 Unchecked, 13.01ms Time], IncrementalHoareTripleChecker [38 Valid, 946 Invalid, 3 Unknown, 72 Unchecked, 13541.75ms Time] [2021-11-13 01:36:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-13 01:36:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2021-11-13 01:36:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 158 states have internal predecessors, (183), 49 states have call successors, (49), 25 states have call predecessors, (49), 29 states have return successors, (67), 50 states have call predecessors, (67), 48 states have call successors, (67) [2021-11-13 01:36:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 299 transitions. [2021-11-13 01:36:47,266 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 299 transitions. Word has length 219 [2021-11-13 01:36:47,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:47,267 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 299 transitions. [2021-11-13 01:36:47,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 7 states have call successors, (38), 5 states have call predecessors, (38), 4 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-11-13 01:36:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 299 transitions. [2021-11-13 01:36:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-13 01:36:47,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:47,275 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:47,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:47,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:47,502 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1273103455, now seen corresponding path program 1 times [2021-11-13 01:36:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:47,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711053920] [2021-11-13 01:36:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:47,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:47,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:47,508 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4463084c-9b5b-4967-8537-f91098b82535/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:36:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:36:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:59,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:36:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 190 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 146 treesize of output 50 [2021-11-13 01:37:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-13 01:37:00,311 INFO L328 TraceCheckSpWp]: Computing backward predicates...