./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba --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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:16:27,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:16:27,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:16:27,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:16:27,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:16:27,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:16:27,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:16:27,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:16:27,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:16:27,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:16:27,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:16:27,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:16:27,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:16:27,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:16:27,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:16:27,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:16:27,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:16:27,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:16:27,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:16:27,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:16:27,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:16:27,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:16:27,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:16:27,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:16:27,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:16:27,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:16:27,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:16:27,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:16:27,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:16:27,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:16:27,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:16:27,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:16:27,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:16:27,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:16:27,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:16:27,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:16:27,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:16:27,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:16:27,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:16:27,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:16:27,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:16:27,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:16:27,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:16:27,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:16:27,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:16:27,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:16:27,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:16:27,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:16:27,839 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:16:27,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:16:27,839 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:16:27,839 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:16:27,840 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:16:27,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:16:27,840 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:16:27,840 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:16:27,840 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:16:27,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:16:27,841 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:16:27,841 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:16:27,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:16:27,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:16:27,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:16:27,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:16:27,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:16:27,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:16:27,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:16:27,846 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:16:27,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:16:27,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:16:27,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:16:27,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:16:27,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:16:27,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:16:27,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:16:27,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:16:27,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:16:27,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:16:27,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:16:27,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:16:27,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-11-22 01:16:28,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:16:28,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:16:28,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:16:28,127 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:16:28,128 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:16:28,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-22 01:16:31,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:16:31,593 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:16:31,594 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-22 01:16:31,635 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/data/49a706629/a90a387be6394bc7be95ca66aad88ae4/FLAG98931aeda [2022-11-22 01:16:31,649 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/data/49a706629/a90a387be6394bc7be95ca66aad88ae4 [2022-11-22 01:16:31,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:16:31,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:16:31,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:16:31,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:16:31,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:16:31,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:16:31" (1/1) ... [2022-11-22 01:16:31,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e9c36c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:31, skipping insertion in model container [2022-11-22 01:16:31,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:16:31" (1/1) ... [2022-11-22 01:16:31,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:16:31,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:16:32,067 WARN L237 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_87c3840b-0049-47fa-858c-48eb0d70d431/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-22 01:16:32,078 WARN L237 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_87c3840b-0049-47fa-858c-48eb0d70d431/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-22 01:16:33,167 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,168 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,169 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,170 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,171 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,186 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,186 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,188 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,189 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:33,680 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:16:33,682 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:16:33,683 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:16:33,684 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:16:33,686 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:16:33,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:16:33,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:16:33,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:16:33,689 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:16:33,690 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:16:33,978 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:16:34,028 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,034 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,129 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,129 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:16:34,238 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:16:34,251 WARN L237 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_87c3840b-0049-47fa-858c-48eb0d70d431/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-22 01:16:34,252 WARN L237 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_87c3840b-0049-47fa-858c-48eb0d70d431/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-22 01:16:34,296 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,300 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,301 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,306 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,307 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,315 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,323 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,325 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,327 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,386 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:16:34,387 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:16:34,388 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:16:34,390 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:16:34,391 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:16:34,392 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:16:34,393 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:16:34,399 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:16:34,401 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:16:34,401 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:16:34,442 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:16:34,469 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,470 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,548 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,549 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:16:34,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:16:34,864 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:16:34,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34 WrapperNode [2022-11-22 01:16:34,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:16:34,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:16:34,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:16:34,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:16:34,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:34,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,033 INFO L138 Inliner]: procedures = 692, calls = 2620, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 956 [2022-11-22 01:16:35,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:16:35,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:16:35,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:16:35,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:16:35,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:16:35,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:16:35,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:16:35,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:16:35,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (1/1) ... [2022-11-22 01:16:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:16:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:35,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:16:35,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:16:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-22 01:16:35,268 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-22 01:16:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:16:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-22 01:16:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-22 01:16:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:16:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-22 01:16:35,270 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-22 01:16:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 01:16:35,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 01:16:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:16:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:16:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:16:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:16:35,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:16:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-22 01:16:35,272 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-22 01:16:35,272 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-22 01:16:35,272 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-22 01:16:35,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-11-22 01:16:35,272 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-11-22 01:16:35,273 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-22 01:16:35,273 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-22 01:16:35,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:16:35,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:16:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:16:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:16:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:16:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-22 01:16:35,274 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-22 01:16:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 01:16:35,274 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 01:16:35,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:16:35,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:16:35,705 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:16:35,707 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:16:37,144 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:16:37,375 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:16:37,375 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:16:37,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:16:37 BoogieIcfgContainer [2022-11-22 01:16:37,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:16:37,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:16:37,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:16:37,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:16:37,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:16:31" (1/3) ... [2022-11-22 01:16:37,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151b4782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:16:37, skipping insertion in model container [2022-11-22 01:16:37,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:16:34" (2/3) ... [2022-11-22 01:16:37,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151b4782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:16:37, skipping insertion in model container [2022-11-22 01:16:37,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:16:37" (3/3) ... [2022-11-22 01:16:37,386 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-11-22 01:16:37,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:16:37,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:16:37,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:16:37,461 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@293f70dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:16:37,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:16:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-22 01:16:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:16:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:37,475 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:16:37,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -355170412, now seen corresponding path program 1 times [2022-11-22 01:16:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878579853] [2022-11-22 01:16:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:16:38,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878579853] [2022-11-22 01:16:38,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878579853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:38,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:38,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:16:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452907211] [2022-11-22 01:16:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:38,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:16:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:16:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:16:38,258 INFO L87 Difference]: Start difference. First operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 01:16:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:38,424 INFO L93 Difference]: Finished difference Result 215 states and 303 transitions. [2022-11-22 01:16:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:16:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-11-22 01:16:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:38,441 INFO L225 Difference]: With dead ends: 215 [2022-11-22 01:16:38,443 INFO L226 Difference]: Without dead ends: 112 [2022-11-22 01:16:38,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:16:38,456 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:38,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:16:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-22 01:16:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-22 01:16:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 64 states have internal predecessors, (74), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-22 01:16:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-11-22 01:16:38,524 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 34 [2022-11-22 01:16:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:38,525 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-11-22 01:16:38,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-22 01:16:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-11-22 01:16:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:16:38,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:38,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:38,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:16:38,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash -424375952, now seen corresponding path program 1 times [2022-11-22 01:16:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:38,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712343056] [2022-11-22 01:16:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:16:39,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:39,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712343056] [2022-11-22 01:16:39,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712343056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:39,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:39,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:16:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418119286] [2022-11-22 01:16:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:39,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:16:39,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:16:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:16:39,086 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 01:16:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:39,494 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-11-22 01:16:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:16:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 37 [2022-11-22 01:16:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:39,496 INFO L225 Difference]: With dead ends: 151 [2022-11-22 01:16:39,496 INFO L226 Difference]: Without dead ends: 116 [2022-11-22 01:16:39,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:16:39,498 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:39,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 640 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:16:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-22 01:16:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-22 01:16:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 67 states have internal predecessors, (77), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-22 01:16:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2022-11-22 01:16:39,513 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 37 [2022-11-22 01:16:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:39,513 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2022-11-22 01:16:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 01:16:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2022-11-22 01:16:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:16:39,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:39,515 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:16:39,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:16:39,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1641044390, now seen corresponding path program 1 times [2022-11-22 01:16:39,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:39,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196813336] [2022-11-22 01:16:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:39,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:16:50,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196813336] [2022-11-22 01:16:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196813336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:16:50,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013932714] [2022-11-22 01:16:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:50,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:50,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:50,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:51,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:16:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 01:16:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:51,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:16:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:16:58,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:16:58,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013932714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:58,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:16:58,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 26 [2022-11-22 01:16:58,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582309226] [2022-11-22 01:16:58,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:16:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:58,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:16:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:16:58,230 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-22 01:17:01,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:04,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:06,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:08,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:12,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:14,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:16,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:18,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:20,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:22,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:25,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:27,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:29,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:31,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:32,353 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-11-22 01:17:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:17:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2022-11-22 01:17:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:32,356 INFO L225 Difference]: With dead ends: 184 [2022-11-22 01:17:32,356 INFO L226 Difference]: Without dead ends: 182 [2022-11-22 01:17:32,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:17:32,358 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 154 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 139 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:32,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 792 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1492 Invalid, 14 Unknown, 0 Unchecked, 33.1s Time] [2022-11-22 01:17:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-22 01:17:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-11-22 01:17:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.145631067961165) internal successors, (118), 105 states have internal predecessors, (118), 51 states have call successors, (51), 21 states have call predecessors, (51), 25 states have return successors, (53), 53 states have call predecessors, (53), 49 states have call successors, (53) [2022-11-22 01:17:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2022-11-22 01:17:32,391 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 40 [2022-11-22 01:17:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:32,391 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2022-11-22 01:17:32,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-22 01:17:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2022-11-22 01:17:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:17:32,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:32,393 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:17:32,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:32,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:32,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:17:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1273911064, now seen corresponding path program 1 times [2022-11-22 01:17:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228470476] [2022-11-22 01:17:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:17:35,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228470476] [2022-11-22 01:17:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228470476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:35,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:17:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 01:17:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348683739] [2022-11-22 01:17:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:35,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:17:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:17:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:17:35,081 INFO L87 Difference]: Start difference. First operand 180 states and 222 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 01:17:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:36,490 INFO L93 Difference]: Finished difference Result 364 states and 455 transitions. [2022-11-22 01:17:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:17:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2022-11-22 01:17:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:36,493 INFO L225 Difference]: With dead ends: 364 [2022-11-22 01:17:36,493 INFO L226 Difference]: Without dead ends: 211 [2022-11-22 01:17:36,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:17:36,494 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 50 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:36,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 649 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:17:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-22 01:17:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 194. [2022-11-22 01:17:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 111 states have (on average 1.135135135135135) internal successors, (126), 114 states have internal predecessors, (126), 56 states have call successors, (56), 22 states have call predecessors, (56), 26 states have return successors, (58), 57 states have call predecessors, (58), 54 states have call successors, (58) [2022-11-22 01:17:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 240 transitions. [2022-11-22 01:17:36,543 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 240 transitions. Word has length 40 [2022-11-22 01:17:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:36,545 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 240 transitions. [2022-11-22 01:17:36,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 01:17:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 240 transitions. [2022-11-22 01:17:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:17:36,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:36,554 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:17:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:17:36,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:17:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash 180781588, now seen corresponding path program 1 times [2022-11-22 01:17:36,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:36,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521535375] [2022-11-22 01:17:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:50,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521535375] [2022-11-22 01:17:50,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521535375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365994704] [2022-11-22 01:17:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:50,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:17:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2457 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 01:17:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:51,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:17:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:17:59,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:17:59,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365994704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:17:59,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:17:59,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 32 [2022-11-22 01:17:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227468147] [2022-11-22 01:17:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:17:59,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:17:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:17:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=896, Unknown=1, NotChecked=0, Total=992 [2022-11-22 01:17:59,935 INFO L87 Difference]: Start difference. First operand 194 states and 240 transitions. Second operand has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 01:18:02,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:04,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:07,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:09,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:11,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:15,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:17,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:19,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:21,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:23,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:25,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:27,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:29,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:31,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:33,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:18:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:34,025 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2022-11-22 01:18:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:18:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-22 01:18:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:34,029 INFO L225 Difference]: With dead ends: 270 [2022-11-22 01:18:34,029 INFO L226 Difference]: Without dead ends: 268 [2022-11-22 01:18:34,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=188, Invalid=1703, Unknown=1, NotChecked=0, Total=1892 [2022-11-22 01:18:34,031 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 217 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 132 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:34,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1016 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1228 Invalid, 15 Unknown, 0 Unchecked, 33.4s Time] [2022-11-22 01:18:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-22 01:18:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2022-11-22 01:18:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 67 states have call successors, (67), 32 states have call predecessors, (67), 38 states have return successors, (70), 69 states have call predecessors, (70), 64 states have call successors, (70) [2022-11-22 01:18:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-11-22 01:18:34,076 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 44 [2022-11-22 01:18:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:34,076 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-11-22 01:18:34,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 01:18:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-11-22 01:18:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:18:34,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:34,078 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:18:34,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:34,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:34,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:34,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash 255889020, now seen corresponding path program 1 times [2022-11-22 01:18:34,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:34,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102010190] [2022-11-22 01:18:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:34,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:34,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102010190] [2022-11-22 01:18:34,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102010190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:34,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:34,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:18:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582091273] [2022-11-22 01:18:34,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:18:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:18:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:18:34,620 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 01:18:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:35,199 INFO L93 Difference]: Finished difference Result 280 states and 330 transitions. [2022-11-22 01:18:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:18:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 46 [2022-11-22 01:18:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:35,202 INFO L225 Difference]: With dead ends: 280 [2022-11-22 01:18:35,203 INFO L226 Difference]: Without dead ends: 241 [2022-11-22 01:18:35,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:18:35,204 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:35,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 656 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:18:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-22 01:18:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2022-11-22 01:18:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 140 states have internal predecessors, (152), 64 states have call successors, (64), 31 states have call predecessors, (64), 36 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-22 01:18:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2022-11-22 01:18:35,245 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 46 [2022-11-22 01:18:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:35,246 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2022-11-22 01:18:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 01:18:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2022-11-22 01:18:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:18:35,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:35,247 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:18:35,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:18:35,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash -452361234, now seen corresponding path program 1 times [2022-11-22 01:18:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383504679] [2022-11-22 01:18:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:36,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383504679] [2022-11-22 01:18:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383504679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:36,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:36,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:18:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539810452] [2022-11-22 01:18:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:36,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:18:36,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:18:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:18:36,430 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:18:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:37,552 INFO L93 Difference]: Finished difference Result 247 states and 291 transitions. [2022-11-22 01:18:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:18:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2022-11-22 01:18:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:37,554 INFO L225 Difference]: With dead ends: 247 [2022-11-22 01:18:37,555 INFO L226 Difference]: Without dead ends: 245 [2022-11-22 01:18:37,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:18:37,556 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:37,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 387 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:18:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-22 01:18:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-11-22 01:18:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 146 states have internal predecessors, (158), 64 states have call successors, (64), 33 states have call predecessors, (64), 38 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-22 01:18:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 288 transitions. [2022-11-22 01:18:37,591 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 288 transitions. Word has length 46 [2022-11-22 01:18:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:37,591 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 288 transitions. [2022-11-22 01:18:37,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:18:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 288 transitions. [2022-11-22 01:18:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:18:37,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:37,593 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:18:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:18:37,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1055566720, now seen corresponding path program 1 times [2022-11-22 01:18:37,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:37,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395528322] [2022-11-22 01:18:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:18:38,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395528322] [2022-11-22 01:18:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395528322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:38,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:38,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:18:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770755149] [2022-11-22 01:18:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:38,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:18:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:18:38,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:18:38,455 INFO L87 Difference]: Start difference. First operand 245 states and 288 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 01:18:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:39,827 INFO L93 Difference]: Finished difference Result 255 states and 297 transitions. [2022-11-22 01:18:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:18:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 52 [2022-11-22 01:18:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:39,829 INFO L225 Difference]: With dead ends: 255 [2022-11-22 01:18:39,830 INFO L226 Difference]: Without dead ends: 253 [2022-11-22 01:18:39,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:18:39,831 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 62 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:39,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 378 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:18:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-22 01:18:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-22 01:18:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 152 states have internal predecessors, (164), 64 states have call successors, (64), 35 states have call predecessors, (64), 40 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-22 01:18:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2022-11-22 01:18:39,868 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 52 [2022-11-22 01:18:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:39,869 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2022-11-22 01:18:39,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 01:18:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2022-11-22 01:18:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:18:39,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:39,870 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:18:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:18:39,871 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -501670539, now seen corresponding path program 1 times [2022-11-22 01:18:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39383861] [2022-11-22 01:18:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:39,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:18:43,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39383861] [2022-11-22 01:18:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39383861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:43,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:43,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:18:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940490929] [2022-11-22 01:18:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:18:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:18:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:18:43,534 INFO L87 Difference]: Start difference. First operand 253 states and 294 transitions. Second operand has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-22 01:18:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:46,121 INFO L93 Difference]: Finished difference Result 274 states and 321 transitions. [2022-11-22 01:18:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:18:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-22 01:18:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:46,127 INFO L225 Difference]: With dead ends: 274 [2022-11-22 01:18:46,127 INFO L226 Difference]: Without dead ends: 272 [2022-11-22 01:18:46,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:18:46,131 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 92 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:46,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 620 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:18:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-22 01:18:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 257. [2022-11-22 01:18:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 151 states have (on average 1.1059602649006623) internal successors, (167), 155 states have internal predecessors, (167), 64 states have call successors, (64), 36 states have call predecessors, (64), 41 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-22 01:18:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 297 transitions. [2022-11-22 01:18:46,184 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 297 transitions. Word has length 54 [2022-11-22 01:18:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:46,186 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 297 transitions. [2022-11-22 01:18:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-22 01:18:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 297 transitions. [2022-11-22 01:18:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 01:18:46,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:46,189 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2022-11-22 01:18:46,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:18:46,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1986068748, now seen corresponding path program 1 times [2022-11-22 01:18:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703679549] [2022-11-22 01:18:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:46,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:18:47,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703679549] [2022-11-22 01:18:47,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703679549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:47,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:47,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:18:47,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929889091] [2022-11-22 01:18:47,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:18:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:18:47,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:18:47,922 INFO L87 Difference]: Start difference. First operand 257 states and 297 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 01:18:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:49,654 INFO L93 Difference]: Finished difference Result 267 states and 306 transitions. [2022-11-22 01:18:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:18:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 59 [2022-11-22 01:18:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:49,657 INFO L225 Difference]: With dead ends: 267 [2022-11-22 01:18:49,657 INFO L226 Difference]: Without dead ends: 263 [2022-11-22 01:18:49,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:18:49,658 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 66 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:49,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 370 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:18:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-22 01:18:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-22 01:18:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 156 states have (on average 1.0961538461538463) internal successors, (171), 159 states have internal predecessors, (171), 64 states have call successors, (64), 38 states have call predecessors, (64), 42 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-22 01:18:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 301 transitions. [2022-11-22 01:18:49,706 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 301 transitions. Word has length 59 [2022-11-22 01:18:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:49,707 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 301 transitions. [2022-11-22 01:18:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 01:18:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 301 transitions. [2022-11-22 01:18:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 01:18:49,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:49,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 01:18:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:18:49,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash 322424277, now seen corresponding path program 1 times [2022-11-22 01:18:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:49,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217085929] [2022-11-22 01:18:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:49,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:18:52,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:52,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217085929] [2022-11-22 01:18:52,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217085929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:52,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:52,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-22 01:18:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614746782] [2022-11-22 01:18:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:52,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:18:52,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:18:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:18:52,219 INFO L87 Difference]: Start difference. First operand 263 states and 301 transitions. Second operand has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-22 01:18:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:55,392 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2022-11-22 01:18:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:18:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 64 [2022-11-22 01:18:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:55,397 INFO L225 Difference]: With dead ends: 286 [2022-11-22 01:18:55,397 INFO L226 Difference]: Without dead ends: 284 [2022-11-22 01:18:55,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:18:55,398 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 118 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:55,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 889 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 01:18:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-22 01:18:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 267. [2022-11-22 01:18:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 159 states have (on average 1.0943396226415094) internal successors, (174), 162 states have internal predecessors, (174), 64 states have call successors, (64), 39 states have call predecessors, (64), 43 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-22 01:18:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 304 transitions. [2022-11-22 01:18:55,448 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 304 transitions. Word has length 64 [2022-11-22 01:18:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:55,448 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 304 transitions. [2022-11-22 01:18:55,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-22 01:18:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 304 transitions. [2022-11-22 01:18:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 01:18:55,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:55,450 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:55,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:18:55,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1272784373, now seen corresponding path program 1 times [2022-11-22 01:18:55,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:55,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425485299] [2022-11-22 01:18:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:18:55,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425485299] [2022-11-22 01:18:55,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425485299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:55,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:55,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:18:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651232210] [2022-11-22 01:18:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:55,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:18:55,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:18:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:18:55,860 INFO L87 Difference]: Start difference. First operand 267 states and 304 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:18:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:56,690 INFO L93 Difference]: Finished difference Result 334 states and 388 transitions. [2022-11-22 01:18:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:18:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-11-22 01:18:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:56,693 INFO L225 Difference]: With dead ends: 334 [2022-11-22 01:18:56,693 INFO L226 Difference]: Without dead ends: 283 [2022-11-22 01:18:56,694 INFO L412 NwaCegarLoop]: 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 [2022-11-22 01:18:56,694 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 8 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:56,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:18:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-22 01:18:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2022-11-22 01:18:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 162 states have (on average 1.0925925925925926) internal successors, (177), 165 states have internal predecessors, (177), 64 states have call successors, (64), 39 states have call predecessors, (64), 44 states have return successors, (67), 66 states have call predecessors, (67), 61 states have call successors, (67) [2022-11-22 01:18:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 308 transitions. [2022-11-22 01:18:56,743 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 308 transitions. Word has length 66 [2022-11-22 01:18:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:56,744 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 308 transitions. [2022-11-22 01:18:56,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:18:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 308 transitions. [2022-11-22 01:18:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 01:18:56,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:56,745 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:56,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:18:56,746 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:56,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1331017075, now seen corresponding path program 1 times [2022-11-22 01:18:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:56,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205909595] [2022-11-22 01:18:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 01:18:57,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205909595] [2022-11-22 01:18:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205909595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:57,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:57,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:18:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335200763] [2022-11-22 01:18:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:18:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:18:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:57,496 INFO L87 Difference]: Start difference. First operand 271 states and 308 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 01:18:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:57,792 INFO L93 Difference]: Finished difference Result 324 states and 371 transitions. [2022-11-22 01:18:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:18:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 71 [2022-11-22 01:18:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:57,794 INFO L225 Difference]: With dead ends: 324 [2022-11-22 01:18:57,795 INFO L226 Difference]: Without dead ends: 263 [2022-11-22 01:18:57,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:18:57,796 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:57,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 222 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-22 01:18:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-22 01:18:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 158 states have (on average 1.0886075949367089) internal successors, (172), 161 states have internal predecessors, (172), 61 states have call successors, (61), 38 states have call predecessors, (61), 43 states have return successors, (64), 63 states have call predecessors, (64), 58 states have call successors, (64) [2022-11-22 01:18:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 297 transitions. [2022-11-22 01:18:57,841 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 297 transitions. Word has length 71 [2022-11-22 01:18:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:57,842 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 297 transitions. [2022-11-22 01:18:57,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 01:18:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 297 transitions. [2022-11-22 01:18:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:18:57,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:57,844 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:57,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:18:57,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:57,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1772650051, now seen corresponding path program 1 times [2022-11-22 01:18:57,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:57,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417889886] [2022-11-22 01:18:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:57,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:18:58,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:58,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417889886] [2022-11-22 01:18:58,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417889886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:18:58,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:18:58,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:18:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737357721] [2022-11-22 01:18:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:18:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:18:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:18:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:18:58,144 INFO L87 Difference]: Start difference. First operand 263 states and 297 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-22 01:18:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:58,545 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2022-11-22 01:18:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:18:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-11-22 01:18:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:58,548 INFO L225 Difference]: With dead ends: 312 [2022-11-22 01:18:58,548 INFO L226 Difference]: Without dead ends: 270 [2022-11-22 01:18:58,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:18:58,549 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 4 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:58,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 619 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:18:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-22 01:18:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2022-11-22 01:18:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 160 states have (on average 1.08125) internal successors, (173), 163 states have internal predecessors, (173), 61 states have call successors, (61), 38 states have call predecessors, (61), 43 states have return successors, (64), 63 states have call predecessors, (64), 58 states have call successors, (64) [2022-11-22 01:18:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 298 transitions. [2022-11-22 01:18:58,596 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 298 transitions. Word has length 70 [2022-11-22 01:18:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:58,597 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 298 transitions. [2022-11-22 01:18:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-22 01:18:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 298 transitions. [2022-11-22 01:18:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:18:58,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:58,598 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:18:58,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -162484669, now seen corresponding path program 1 times [2022-11-22 01:18:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449900845] [2022-11-22 01:18:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:19:06,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:06,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449900845] [2022-11-22 01:19:06,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449900845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:19:06,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372280126] [2022-11-22 01:19:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:19:06,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:19:06,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:19:06,531 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:19:06,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87c3840b-0049-47fa-858c-48eb0d70d431/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:19:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:19:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-22 01:19:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:19:07,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:19:15,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:19:15,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-11-22 01:19:15,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:19:15,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 17 [2022-11-22 01:19:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:19:15,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:18,701 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-22 01:27:20,690 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.