./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P --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 b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:23:45,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:23:45,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:23:45,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:23:45,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:23:45,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:23:45,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:23:45,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:23:45,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:23:45,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:23:45,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:23:45,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:23:45,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:23:45,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:23:45,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:23:45,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:23:45,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:23:45,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:23:45,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:23:45,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:23:45,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:23:45,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:23:45,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:23:45,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:23:45,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:23:45,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:23:45,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:23:45,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:23:45,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:23:45,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:23:45,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:23:45,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:23:45,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:23:45,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:23:45,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:23:45,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:23:45,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:23:45,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:23:45,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:23:45,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:23:45,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:23:45,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:23:45,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:23:45,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:23:45,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:23:45,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:23:45,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:23:45,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:23:45,843 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:23:45,843 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:23:45,843 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:23:45,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:23:45,844 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:23:45,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:23:45,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:23:45,844 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:23:45,845 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:23:45,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:23:45,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:23:45,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:23:45,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:23:45,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:23:45,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:23:45,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:23:45,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:23:45,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:23:45,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:23:45,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:23:45,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:23:45,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:23:45,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:23:45,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:23:45,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:23:45,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:23:45,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:23:45,850 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:23:45,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:23:45,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:23:45,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:23:45,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:23:45,851 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_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 [2021-11-21 00:23:46,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:23:46,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:23:46,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:23:46,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:23:46,145 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:23:46,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2021-11-21 00:23:46,226 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/data/928158f89/5ed7d0030e964d4f8416857341dbbf0a/FLAG32e086868 [2021-11-21 00:23:47,109 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:23:47,110 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2021-11-21 00:23:47,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/data/928158f89/5ed7d0030e964d4f8416857341dbbf0a/FLAG32e086868 [2021-11-21 00:23:47,589 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/data/928158f89/5ed7d0030e964d4f8416857341dbbf0a [2021-11-21 00:23:47,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:23:47,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:23:47,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:23:47,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:23:47,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:23:47,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:23:47" (1/1) ... [2021-11-21 00:23:47,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363e0b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:47, skipping insertion in model container [2021-11-21 00:23:47,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:23:47" (1/1) ... [2021-11-21 00:23:47,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:23:47,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:23:48,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2021-11-21 00:23:48,084 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2021-11-21 00:23:49,256 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,270 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,273 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,290 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,291 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,297 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,300 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,310 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:49,829 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:23:49,830 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:23:49,831 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:23:49,832 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:23:49,834 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:23:49,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:23:49,864 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:23:49,865 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:23:49,865 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:23:49,866 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:23:50,075 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:23:50,427 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,428 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,451 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,456 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,457 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,471 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,472 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,473 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,475 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,475 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:23:50,539 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:23:50,552 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2021-11-21 00:23:50,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2021-11-21 00:23:50,585 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,586 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,586 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,587 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,587 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,593 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,593 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,594 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,626 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:23:50,627 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:23:50,628 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:23:50,629 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:23:50,630 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:23:50,630 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:23:50,631 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:23:50,631 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:23:50,632 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:23:50,632 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:23:50,651 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:23:50,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,783 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,784 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,793 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,793 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,794 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,794 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,794 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,795 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:23:50,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:23:51,075 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:23:51,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51 WrapperNode [2021-11-21 00:23:51,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:23:51,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:23:51,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:23:51,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:23:51,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,297 INFO L137 Inliner]: procedures = 774, calls = 2455, calls flagged for inlining = 69, calls inlined = 20, statements flattened = 838 [2021-11-21 00:23:51,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:23:51,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:23:51,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:23:51,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:23:51,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:23:51,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:23:51,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:23:51,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:23:51,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (1/1) ... [2021-11-21 00:23:51,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:23:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:51,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:23:51,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:23:51,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-21 00:23:51,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:23:51,506 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 00:23:51,507 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 00:23:51,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:23:51,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:23:51,507 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-21 00:23:51,507 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-21 00:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:23:51,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:23:51,509 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:23:51,509 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-21 00:23:51,509 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-21 00:23:51,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:23:51,509 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-21 00:23:51,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-21 00:23:51,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:23:51,510 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:23:51,510 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:23:51,510 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_find [2021-11-21 00:23:51,510 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_find [2021-11-21 00:23:51,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:23:51,511 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-21 00:23:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-21 00:23:51,511 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-21 00:23:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-21 00:23:51,511 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-21 00:23:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-21 00:23:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-21 00:23:51,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-21 00:23:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:23:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-21 00:23:51,512 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-21 00:23:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-21 00:23:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-21 00:23:51,513 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-21 00:23:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-21 00:23:51,513 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-21 00:23:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-21 00:23:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:23:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:23:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-21 00:23:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-21 00:23:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:23:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-21 00:23:51,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-21 00:23:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-21 00:23:51,515 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-21 00:23:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2021-11-21 00:23:51,515 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2021-11-21 00:23:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 00:23:51,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-21 00:23:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:23:51,926 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:23:51,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:23:52,060 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-21 00:23:52,109 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-21 00:23:52,395 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-11-21 00:23:53,015 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:23:53,169 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:23:53,169 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-21 00:23:53,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:23:53 BoogieIcfgContainer [2021-11-21 00:23:53,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:23:53,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:23:53,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:23:53,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:23:53,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:23:47" (1/3) ... [2021-11-21 00:23:53,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c09407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:23:53, skipping insertion in model container [2021-11-21 00:23:53,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:23:51" (2/3) ... [2021-11-21 00:23:53,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c09407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:23:53, skipping insertion in model container [2021-11-21 00:23:53,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:23:53" (3/3) ... [2021-11-21 00:23:53,180 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_find_harness.i [2021-11-21 00:23:53,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:23:53,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:23:53,234 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:23:53,241 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 [2021-11-21 00:23:53,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:23:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 109 states have internal predecessors, (134), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-11-21 00:23:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-21 00:23:53,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:53,278 INFO L514 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 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] [2021-11-21 00:23:53,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash -539624963, now seen corresponding path program 1 times [2021-11-21 00:23:53,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:53,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526311671] [2021-11-21 00:23:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:53,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:53,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:23:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066652918] [2021-11-21 00:23:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:53,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:53,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:53,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:53,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:23:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:54,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2467 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:23:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-21 00:23:54,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:23:54,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526311671] [2021-11-21 00:23:54,776 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:23:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066652918] [2021-11-21 00:23:54,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066652918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:23:54,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:23:54,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:23:54,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914110335] [2021-11-21 00:23:54,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:23:54,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:23:54,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:23:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:23:54,830 INFO L87 Difference]: Start difference. First operand has 200 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 109 states have internal predecessors, (134), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 00:23:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:56,003 INFO L93 Difference]: Finished difference Result 396 states and 554 transitions. [2021-11-21 00:23:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:23:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 131 [2021-11-21 00:23:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:56,017 INFO L225 Difference]: With dead ends: 396 [2021-11-21 00:23:56,017 INFO L226 Difference]: Without dead ends: 202 [2021-11-21 00:23:56,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:23:56,026 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 1 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:56,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 924 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 00:23:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-21 00:23:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-11-21 00:23:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 110 states have (on average 1.190909090909091) internal successors, (131), 111 states have internal predecessors, (131), 68 states have call successors, (68), 22 states have call predecessors, (68), 23 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2021-11-21 00:23:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 267 transitions. [2021-11-21 00:23:56,094 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 267 transitions. Word has length 131 [2021-11-21 00:23:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:56,095 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 267 transitions. [2021-11-21 00:23:56,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 00:23:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 267 transitions. [2021-11-21 00:23:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 00:23:56,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:56,100 INFO L514 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 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] [2021-11-21 00:23:56,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:56,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:23:56,323 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1729564345, now seen corresponding path program 1 times [2021-11-21 00:23:56,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:56,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614868103] [2021-11-21 00:23:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:56,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-21 00:23:56,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:56,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614868103] [2021-11-21 00:23:56,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614868103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:23:56,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669965510] [2021-11-21 00:23:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:56,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:56,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:56,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:56,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:23:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 00:23:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:57,817 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 [2021-11-21 00:23:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-21 00:23:58,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:23:58,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669965510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:23:58,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:23:58,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2021-11-21 00:23:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280445751] [2021-11-21 00:23:58,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:23:58,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:23:58,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:23:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:23:58,522 INFO L87 Difference]: Start difference. First operand 202 states and 267 transitions. Second operand has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-21 00:23:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:59,366 INFO L93 Difference]: Finished difference Result 390 states and 513 transitions. [2021-11-21 00:23:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:23:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 139 [2021-11-21 00:23:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:59,372 INFO L225 Difference]: With dead ends: 390 [2021-11-21 00:23:59,372 INFO L226 Difference]: Without dead ends: 204 [2021-11-21 00:23:59,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:23:59,374 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 22 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:59,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1232 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 64 Unchecked, 0.8s Time] [2021-11-21 00:23:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-21 00:23:59,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-21 00:23:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 112 states have (on average 1.1875) internal successors, (133), 112 states have internal predecessors, (133), 68 states have call successors, (68), 23 states have call predecessors, (68), 23 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2021-11-21 00:23:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 269 transitions. [2021-11-21 00:23:59,420 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 269 transitions. Word has length 139 [2021-11-21 00:23:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:59,421 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 269 transitions. [2021-11-21 00:23:59,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-21 00:23:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 269 transitions. [2021-11-21 00:23:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 00:23:59,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:59,425 INFO L514 BasicCegarLoop]: trace histogram [14, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:59,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:59,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:59,651 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1847957895, now seen corresponding path program 1 times [2021-11-21 00:23:59,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392988033] [2021-11-21 00:23:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:59,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-21 00:23:59,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:59,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392988033] [2021-11-21 00:23:59,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392988033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:23:59,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256795759] [2021-11-21 00:23:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:59,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:59,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:59,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:24:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:24:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:00,782 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 [2021-11-21 00:24:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-21 00:24:01,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:01,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256795759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:01,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:24:01,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2021-11-21 00:24:01,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537224251] [2021-11-21 00:24:01,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:01,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:24:01,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:24:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:24:01,301 INFO L87 Difference]: Start difference. First operand 204 states and 269 transitions. Second operand has 12 states, 9 states have (on average 7.222222222222222) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-21 00:24:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:01,816 INFO L93 Difference]: Finished difference Result 396 states and 520 transitions. [2021-11-21 00:24:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:24:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 7.222222222222222) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 145 [2021-11-21 00:24:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:01,823 INFO L225 Difference]: With dead ends: 396 [2021-11-21 00:24:01,823 INFO L226 Difference]: Without dead ends: 207 [2021-11-21 00:24:01,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:24:01,826 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 25 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:01,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1065 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2021-11-21 00:24:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-21 00:24:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-11-21 00:24:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 114 states have internal predecessors, (135), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (69), 68 states have call predecessors, (69), 68 states have call successors, (69) [2021-11-21 00:24:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 273 transitions. [2021-11-21 00:24:01,864 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 273 transitions. Word has length 145 [2021-11-21 00:24:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:01,865 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 273 transitions. [2021-11-21 00:24:01,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 7.222222222222222) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-21 00:24:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 273 transitions. [2021-11-21 00:24:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-21 00:24:01,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:01,880 INFO L514 BasicCegarLoop]: trace histogram [14, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:01,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:02,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:02,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1665949110, now seen corresponding path program 1 times [2021-11-21 00:24:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989758451] [2021-11-21 00:24:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:02,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-11-21 00:24:02,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989758451] [2021-11-21 00:24:02,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989758451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:02,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:24:02,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:24:02,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760248145] [2021-11-21 00:24:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:02,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:24:02,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:24:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:24:02,424 INFO L87 Difference]: Start difference. First operand 207 states and 273 transitions. Second operand has 5 states, 3 states have (on average 17.333333333333332) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 00:24:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:03,276 INFO L93 Difference]: Finished difference Result 327 states and 435 transitions. [2021-11-21 00:24:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:24:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 17.333333333333332) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 149 [2021-11-21 00:24:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:03,281 INFO L225 Difference]: With dead ends: 327 [2021-11-21 00:24:03,281 INFO L226 Difference]: Without dead ends: 209 [2021-11-21 00:24:03,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:24:03,283 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 0 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:03,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 842 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:24:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-21 00:24:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-21 00:24:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 115 states have (on average 1.182608695652174) internal successors, (136), 116 states have internal predecessors, (136), 69 states have call successors, (69), 24 states have call predecessors, (69), 24 states have return successors, (72), 68 states have call predecessors, (72), 68 states have call successors, (72) [2021-11-21 00:24:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 277 transitions. [2021-11-21 00:24:03,328 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 277 transitions. Word has length 149 [2021-11-21 00:24:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:03,331 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 277 transitions. [2021-11-21 00:24:03,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 17.333333333333332) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 00:24:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 277 transitions. [2021-11-21 00:24:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-21 00:24:03,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:03,339 INFO L514 BasicCegarLoop]: trace histogram [14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:03,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:24:03,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:03,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1308818725, now seen corresponding path program 1 times [2021-11-21 00:24:03,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:03,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321617395] [2021-11-21 00:24:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:03,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-21 00:24:03,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321617395] [2021-11-21 00:24:03,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321617395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:03,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:24:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-21 00:24:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064965580] [2021-11-21 00:24:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:03,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:24:03,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:24:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:24:03,885 INFO L87 Difference]: Start difference. First operand 209 states and 277 transitions. Second operand has 14 states, 11 states have (on average 5.090909090909091) internal successors, (56), 12 states have internal predecessors, (56), 8 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (30), 5 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-21 00:24:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:06,288 INFO L93 Difference]: Finished difference Result 342 states and 458 transitions. [2021-11-21 00:24:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:24:06,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.090909090909091) internal successors, (56), 12 states have internal predecessors, (56), 8 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (30), 5 states have call predecessors, (30), 7 states have call successors, (30) Word has length 153 [2021-11-21 00:24:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:06,292 INFO L225 Difference]: With dead ends: 342 [2021-11-21 00:24:06,293 INFO L226 Difference]: Without dead ends: 215 [2021-11-21 00:24:06,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:24:06,295 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 47 mSDsluCounter, 2552 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 2457 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:24:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-21 00:24:06,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2021-11-21 00:24:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 118 states have internal predecessors, (137), 69 states have call successors, (69), 24 states have call predecessors, (69), 25 states have return successors, (75), 68 states have call predecessors, (75), 68 states have call successors, (75) [2021-11-21 00:24:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 281 transitions. [2021-11-21 00:24:06,317 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 281 transitions. Word has length 153 [2021-11-21 00:24:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:06,318 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 281 transitions. [2021-11-21 00:24:06,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.090909090909091) internal successors, (56), 12 states have internal predecessors, (56), 8 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (30), 5 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-21 00:24:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 281 transitions. [2021-11-21 00:24:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-21 00:24:06,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:06,321 INFO L514 BasicCegarLoop]: trace histogram [14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:06,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:24:06,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash 281187341, now seen corresponding path program 2 times [2021-11-21 00:24:06,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:06,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339963596] [2021-11-21 00:24:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:06,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-21 00:24:06,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339963596] [2021-11-21 00:24:06,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339963596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:24:06,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467547774] [2021-11-21 00:24:06,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:24:06,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:06,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:06,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:06,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:24:07,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:24:07,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:24:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:24:07,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-21 00:24:07,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467547774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:07,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:24:07,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-21 00:24:07,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537358918] [2021-11-21 00:24:07,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:07,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:24:07,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:24:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:24:07,400 INFO L87 Difference]: Start difference. First operand 211 states and 281 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-21 00:24:08,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:08,808 INFO L93 Difference]: Finished difference Result 219 states and 288 transitions. [2021-11-21 00:24:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:24:08,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) Word has length 159 [2021-11-21 00:24:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:08,811 INFO L225 Difference]: With dead ends: 219 [2021-11-21 00:24:08,811 INFO L226 Difference]: Without dead ends: 217 [2021-11-21 00:24:08,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:24:08,813 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 8 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:08,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 910 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:24:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-21 00:24:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-11-21 00:24:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 121 states have internal predecessors, (140), 69 states have call successors, (69), 25 states have call predecessors, (69), 26 states have return successors, (75), 68 states have call predecessors, (75), 68 states have call successors, (75) [2021-11-21 00:24:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 284 transitions. [2021-11-21 00:24:08,832 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 284 transitions. Word has length 159 [2021-11-21 00:24:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:08,833 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 284 transitions. [2021-11-21 00:24:08,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-21 00:24:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 284 transitions. [2021-11-21 00:24:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-21 00:24:08,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:08,836 INFO L514 BasicCegarLoop]: trace histogram [14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:08,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 00:24:09,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:24:09,059 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1693755451, now seen corresponding path program 1 times [2021-11-21 00:24:09,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:09,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762369450] [2021-11-21 00:24:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:09,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-21 00:24:09,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:09,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762369450] [2021-11-21 00:24:09,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762369450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:24:09,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977894129] [2021-11-21 00:24:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:09,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:09,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:09,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:24:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:09,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 00:24:09,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-21 00:24:11,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977894129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:11,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:24:11,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-21 00:24:11,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586088809] [2021-11-21 00:24:11,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:11,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:24:11,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:24:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:24:11,441 INFO L87 Difference]: Start difference. First operand 215 states and 284 transitions. Second operand has 10 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-21 00:24:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:12,278 INFO L93 Difference]: Finished difference Result 358 states and 479 transitions. [2021-11-21 00:24:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:24:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 5 states have call successors, (33) Word has length 168 [2021-11-21 00:24:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:12,282 INFO L225 Difference]: With dead ends: 358 [2021-11-21 00:24:12,282 INFO L226 Difference]: Without dead ends: 217 [2021-11-21 00:24:12,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:24:12,284 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 29 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:12,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1456 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 192 Invalid, 0 Unknown, 112 Unchecked, 0.8s Time] [2021-11-21 00:24:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-21 00:24:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-11-21 00:24:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 68 states have call successors, (68), 25 states have call predecessors, (68), 26 states have return successors, (73), 68 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-21 00:24:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 281 transitions. [2021-11-21 00:24:12,302 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 281 transitions. Word has length 168 [2021-11-21 00:24:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:12,303 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 281 transitions. [2021-11-21 00:24:12,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-21 00:24:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 281 transitions. [2021-11-21 00:24:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-21 00:24:12,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:12,306 INFO L514 BasicCegarLoop]: trace histogram [14, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:12,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:12,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:24:12,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2010366356, now seen corresponding path program 1 times [2021-11-21 00:24:12,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:12,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38592489] [2021-11-21 00:24:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:12,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-21 00:24:12,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38592489] [2021-11-21 00:24:12,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38592489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:24:12,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239259792] [2021-11-21 00:24:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:12,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:12,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:12,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:12,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:24:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:24:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-21 00:24:13,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239259792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:13,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:24:13,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:24:13,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667542748] [2021-11-21 00:24:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:13,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:24:13,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:24:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:24:13,843 INFO L87 Difference]: Start difference. First operand 214 states and 281 transitions. Second operand has 7 states, 3 states have (on average 21.666666666666668) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 3 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-21 00:24:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:15,150 INFO L93 Difference]: Finished difference Result 356 states and 469 transitions. [2021-11-21 00:24:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:24:15,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 3 states have (on average 21.666666666666668) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 3 states have call predecessors, (33), 4 states have call successors, (33) Word has length 172 [2021-11-21 00:24:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:15,154 INFO L225 Difference]: With dead ends: 356 [2021-11-21 00:24:15,154 INFO L226 Difference]: Without dead ends: 215 [2021-11-21 00:24:15,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:24:15,156 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 11 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:15,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1220 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:24:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-21 00:24:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2021-11-21 00:24:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 68 states have call successors, (68), 25 states have call predecessors, (68), 26 states have return successors, (72), 68 states have call predecessors, (72), 67 states have call successors, (72) [2021-11-21 00:24:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 280 transitions. [2021-11-21 00:24:15,173 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 280 transitions. Word has length 172 [2021-11-21 00:24:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:15,173 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 280 transitions. [2021-11-21 00:24:15,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 3 states have (on average 21.666666666666668) internal successors, (65), 6 states have internal predecessors, (65), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 3 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-21 00:24:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 280 transitions. [2021-11-21 00:24:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-21 00:24:15,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:15,177 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:24:15,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:15,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:15,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -772513423, now seen corresponding path program 1 times [2021-11-21 00:24:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282429291] [2021-11-21 00:24:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:15,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-21 00:24:16,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:16,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282429291] [2021-11-21 00:24:16,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282429291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:24:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723369045] [2021-11-21 00:24:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:16,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:16,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:16,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:24:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:17,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:24:17,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-21 00:24:17,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:17,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723369045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:17,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:24:17,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-21 00:24:17,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138435424] [2021-11-21 00:24:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:17,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:24:17,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:17,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:24:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:24:17,535 INFO L87 Difference]: Start difference. First operand 214 states and 280 transitions. Second operand has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-21 00:24:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:18,906 INFO L93 Difference]: Finished difference Result 422 states and 550 transitions. [2021-11-21 00:24:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:24:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 182 [2021-11-21 00:24:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:18,909 INFO L225 Difference]: With dead ends: 422 [2021-11-21 00:24:18,909 INFO L226 Difference]: Without dead ends: 216 [2021-11-21 00:24:18,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:24:18,911 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 0 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:18,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 831 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:24:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-21 00:24:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-21 00:24:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 120 states have (on average 1.175) internal successors, (141), 122 states have internal predecessors, (141), 68 states have call successors, (68), 25 states have call predecessors, (68), 27 states have return successors, (73), 68 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-21 00:24:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 282 transitions. [2021-11-21 00:24:18,929 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 282 transitions. Word has length 182 [2021-11-21 00:24:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:18,930 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 282 transitions. [2021-11-21 00:24:18,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-21 00:24:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 282 transitions. [2021-11-21 00:24:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-21 00:24:18,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:18,934 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:24:18,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:19,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:19,154 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 995806080, now seen corresponding path program 1 times [2021-11-21 00:24:19,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:19,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950425535] [2021-11-21 00:24:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:19,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:19,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:24:19,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284850508] [2021-11-21 00:24:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:19,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:19,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:19,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:24:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:24:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-21 00:24:20,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:20,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950425535] [2021-11-21 00:24:20,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:24:20,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284850508] [2021-11-21 00:24:20,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284850508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:20,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:24:20,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:24:20,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156085651] [2021-11-21 00:24:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:20,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:24:20,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:24:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:24:20,167 INFO L87 Difference]: Start difference. First operand 216 states and 282 transitions. Second operand has 5 states, 4 states have (on average 17.75) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-21 00:24:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:21,551 INFO L93 Difference]: Finished difference Result 365 states and 481 transitions. [2021-11-21 00:24:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:24:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.75) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 187 [2021-11-21 00:24:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:21,554 INFO L225 Difference]: With dead ends: 365 [2021-11-21 00:24:21,555 INFO L226 Difference]: Without dead ends: 214 [2021-11-21 00:24:21,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:24:21,556 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 0 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:21,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 830 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:24:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-21 00:24:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2021-11-21 00:24:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 117 states have internal predecessors, (136), 68 states have call successors, (68), 25 states have call predecessors, (68), 25 states have return successors, (71), 67 states have call predecessors, (71), 67 states have call successors, (71) [2021-11-21 00:24:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 275 transitions. [2021-11-21 00:24:21,571 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 275 transitions. Word has length 187 [2021-11-21 00:24:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:21,572 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 275 transitions. [2021-11-21 00:24:21,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.75) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-21 00:24:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 275 transitions. [2021-11-21 00:24:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-21 00:24:21,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:21,575 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:21,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:21,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:24:21,776 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:21,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1274731677, now seen corresponding path program 1 times [2021-11-21 00:24:21,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383335223] [2021-11-21 00:24:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:21,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:21,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:24:21,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103812411] [2021-11-21 00:24:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:21,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:21,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:21,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:24:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:24:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-21 00:24:23,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:24:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-21 00:24:23,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383335223] [2021-11-21 00:24:23,775 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:24:23,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103812411] [2021-11-21 00:24:23,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103812411] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:24:23,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:24:23,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2021-11-21 00:24:23,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457787598] [2021-11-21 00:24:23,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:23,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:24:23,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:24:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:24:23,780 INFO L87 Difference]: Start difference. First operand 210 states and 275 transitions. Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) [2021-11-21 00:24:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:24,908 INFO L93 Difference]: Finished difference Result 218 states and 282 transitions. [2021-11-21 00:24:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:24:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) Word has length 192 [2021-11-21 00:24:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:24,912 INFO L225 Difference]: With dead ends: 218 [2021-11-21 00:24:24,912 INFO L226 Difference]: Without dead ends: 216 [2021-11-21 00:24:24,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:24:24,913 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 6 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:24,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 911 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 00:24:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-21 00:24:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2021-11-21 00:24:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 120 states have internal predecessors, (139), 68 states have call successors, (68), 26 states have call predecessors, (68), 26 states have return successors, (71), 67 states have call predecessors, (71), 67 states have call successors, (71) [2021-11-21 00:24:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2021-11-21 00:24:24,928 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 192 [2021-11-21 00:24:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:24,929 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2021-11-21 00:24:24,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) [2021-11-21 00:24:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2021-11-21 00:24:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-21 00:24:24,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:24,931 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:24,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:25,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:24:25,147 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash 737908145, now seen corresponding path program 1 times [2021-11-21 00:24:25,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:25,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885713964] [2021-11-21 00:24:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:25,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:25,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:24:25,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561447131] [2021-11-21 00:24:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:25,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:25,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:25,199 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:25,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e75722d-88e5-4496-8fd8-5df1465dbe7e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:24:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 281 conjunts are in the unsatisfiable core [2021-11-21 00:24:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:26,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 00:24:26,597 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:24:26,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:24:26,651 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:24:26,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:24:27,328 INFO L354 Elim1Store]: treesize reduction 211, result has 10.2 percent of original size [2021-11-21 00:24:27,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 70 [2021-11-21 00:24:27,894 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-21 00:24:27,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 40 [2021-11-21 00:24:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:28,068 INFO L354 Elim1Store]: treesize reduction 66, result has 32.7 percent of original size [2021-11-21 00:24:28,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 58 [2021-11-21 00:24:28,453 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 74 treesize of output 70 [2021-11-21 00:24:28,506 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-21 00:24:28,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 83 treesize of output 100 [2021-11-21 00:24:29,014 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 11 treesize of output 7 [2021-11-21 00:24:55,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:55,360 INFO L354 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2021-11-21 00:24:55,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 445 treesize of output 314 [2021-11-21 00:24:55,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:55,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:55,486 INFO L354 Elim1Store]: treesize reduction 282, result has 20.6 percent of original size [2021-11-21 00:24:55,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 596 treesize of output 482 [2021-11-21 00:24:55,640 INFO L354 Elim1Store]: treesize reduction 186, result has 26.2 percent of original size [2021-11-21 00:24:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 579 treesize of output 627 [2021-11-21 00:24:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:24:56,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 14 [2021-11-21 00:24:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 14 [2021-11-21 00:24:56,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:24:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:24:56,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 239 treesize of output 156 [2021-11-21 00:24:56,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:56,733 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 00:24:56,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 73 [2021-11-21 00:28:17,193 INFO L354 Elim1Store]: treesize reduction 76, result has 33.3 percent of original size [2021-11-21 00:28:17,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 158 [2021-11-21 00:28:17,394 INFO L354 Elim1Store]: treesize reduction 96, result has 36.0 percent of original size [2021-11-21 00:28:17,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 212 [2021-11-21 00:31:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:31:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:31:56,544 INFO L354 Elim1Store]: treesize reduction 361, result has 21.2 percent of original size [2021-11-21 00:31:56,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 214 treesize of output 286 [2021-11-21 00:32:17,305 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:32:17,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 124 [2021-11-21 00:32:17,340 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:32:17,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 105 [2021-11-21 00:32:17,471 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-21 00:32:17,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 106 [2021-11-21 00:32:18,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-21 00:32:41,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:32:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:33:04,277 INFO L354 Elim1Store]: treesize reduction 176, result has 14.1 percent of original size [2021-11-21 00:33:04,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 215 [2021-11-21 00:33:05,256 INFO L354 Elim1Store]: treesize reduction 236, result has 13.6 percent of original size [2021-11-21 00:33:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 252 treesize of output 229 [2021-11-21 00:33:07,295 INFO L354 Elim1Store]: treesize reduction 578, result has 6.9 percent of original size [2021-11-21 00:33:07,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 238 treesize of output 244 [2021-11-21 00:34:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:46,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:48,235 INFO L354 Elim1Store]: treesize reduction 378, result has 17.5 percent of original size [2021-11-21 00:34:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 222 treesize of output 271